style(rubocop): fix all safe auto correctable offenses

Gemfile

@@ -1,52 +1,52 @@
-source 'https://rubygems.org'
-gem 'rails', '= 5.2.8.1'
-gem 'mysql2'
-gem 'puma'
-gem 'turbolinks', '~> 5'
-gem 'haml'
-gem 'nifty-utils'
-gem 'nilify_blanks'
-gem 'kaminari'
-gem 'bcrypt'
-gem 'foreman'
-gem 'hashie'
-gem 'authie', '~> 3.0'
-gem 'dynamic_form'
-gem 'changey'
-gem 'mail', :git => 'https://github.com/mikel/mail.git', :branch => '2-7-stable'
-gem 'autoprefixer-rails'
-gem 'bunny'
-gem 'secure_headers'
-gem 'chronic'
-gem 'basic_ssl'
-gem 'clockwork'
-gem 'encrypto_signo'
-gem 'nio4r'
-gem 'sentry-raven'
-gem 'gelf'
-gem 'moonrope'
-gem 'jwt'
-gem 'highline', :require => false
-gem 'resolv', '~> 0.2.1'
-gem 'dotenv-rails'
+source "https://rubygems.org"
+gem "authie", "~> 3.0"
+gem "autoprefixer-rails"
+gem "basic_ssl"
+gem "bcrypt"
+gem "bunny"
+gem "changey"
+gem "chronic"
+gem "clockwork"
+gem "dotenv-rails"
+gem "dynamic_form"
+gem "encrypto_signo"
+gem "foreman"
+gem "gelf"
+gem "haml"
+gem "hashie"
+gem "highline", require: false
+gem "jwt"
+gem "kaminari"
+gem "mail", git: "https://github.com/mikel/mail.git", branch: "2-7-stable"
+gem "moonrope"
+gem "mysql2"
+gem "nifty-utils"
+gem "nilify_blanks"
+gem "nio4r"
+gem "puma"
+gem "rails", "= 5.2.8.1"
+gem "resolv", "~> 0.2.1"
+gem "secure_headers"
+gem "sentry-raven"
+gem "turbolinks", "~> 5"
 
 group :development, :assets do
-  gem 'sass-rails', '~> 5.0'
-  gem 'uglifier', '>= 1.3.0'
-  gem 'coffee-rails', '~> 4.2'
-  gem 'jquery-rails'
+  gem "coffee-rails", "~> 4.2"
+  gem "jquery-rails"
+  gem "sass-rails", "~> 5.0"
+  gem "uglifier", ">= 1.3.0"
 end
 
 group :development, :test do
-  gem 'byebug'
+  gem "byebug"
 end
 
 group :development do
-  gem 'annotate'
-  gem 'rspec', require: false
-  gem 'rspec-rails', require: false
-  gem "factory_bot_rails", "~> 4.0", require: false
+  gem "annotate"
   gem "database_cleaner", require: false
+  gem "factory_bot_rails", "~> 4.0", require: false
+  gem "rspec", require: false
+  gem "rspec-rails", require: false
   gem "rubocop"
   gem "rubocop-rails"
 end

Rakefile

@@ -1,6 +1,6 @@
 # Add your own tasks in files placed in lib/tasks ending in .rake,
 # for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
 
-require_relative 'config/application'
+require_relative "config/application"
 
 Rails.application.load_tasks

api/authenticator.rb

@@ -1,19 +1,19 @@
 authenticator :server do
   friendly_name "Server Authenticator"
-  header "X-Server-API-Key", "The API token for a server that you wish to authenticate with.", :example => 'f29a45f0d4e1744ebaee'
-  error 'InvalidServerAPIKey', "The API token provided in X-Server-API-Key was not valid.", :attributes => {:token => "The token that was looked up"}
-  error 'ServerSuspended', "The mail server has been suspended"
+  header "X-Server-API-Key", "The API token for a server that you wish to authenticate with.", example: "f29a45f0d4e1744ebaee"
+  error "InvalidServerAPIKey", "The API token provided in X-Server-API-Key was not valid.", attributes: { token: "The token that was looked up" }
+  error "ServerSuspended", "The mail server has been suspended"
   lookup do
-    if key = request.headers['X-Server-API-Key']
-      if credential = Credential.where(:type => 'API', :key => key).first
+    if key = request.headers["X-Server-API-Key"]
+      if credential = Credential.where(type: "API", key: key).first
         if credential.server.suspended?
-          error 'ServerSuspended'
+          error "ServerSuspended"
         else
           credential.use
           credential
         end
       else
-        error 'InvalidServerAPIKey', :token => key
+        error "InvalidServerAPIKey", token: key
       end
     end
   end

api/controllers/messages_api_controller.rb

@@ -6,35 +6,34 @@ controller :messages do
   action :message do
     title "Return message details"
     description "Returns all details about a message"
-    param :id, "The ID of the message", :type => Integer, :required => true
-    returns Hash, :structure => :message, :structure_opts => {:paramable => {:expansions => false}}
-    error 'MessageNotFound', "No message found matching provided ID", :attributes => {:id => "The ID of the message"}
+    param :id, "The ID of the message", type: Integer, required: true
+    returns Hash, structure: :message, structure_opts: { paramable: { expansions: false } }
+    error "MessageNotFound", "No message found matching provided ID", attributes: { id: "The ID of the message" }
     action do
       begin
         message = identity.server.message(params.id)
       rescue Postal::MessageDB::Message::NotFound => e
-        error 'MessageNotFound', :id => params.id
+        error "MessageNotFound", id: params.id
       end
-      structure :message, message, :return => true
+      structure :message, message, return: true
     end
   end
 
   action :deliveries do
     title "Return deliveries for a message"
     description "Returns an array of deliveries which have been attempted for this message"
-    param :id, "The ID of the message", :type => Integer, :required => true
-    returns Array, :structure => :delivery, :structure_opts => {:full => true}
-    error 'MessageNotFound', "No message found matching provided ID", :attributes => {:id => "The ID of the message"}
+    param :id, "The ID of the message", type: Integer, required: true
+    returns Array, structure: :delivery, structure_opts: { full: true }
+    error "MessageNotFound", "No message found matching provided ID", attributes: { id: "The ID of the message" }
     action do
       begin
         message = identity.server.message(params.id)
       rescue Postal::MessageDB::Message::NotFound => e
-        error 'MessageNotFound', :id => params.id
+        error "MessageNotFound", id: params.id
       end
       message.deliveries.map do |d|
         structure :delivery, d
       end
     end
   end
-
 end

api/controllers/send_api_controller.rb

@@ -7,30 +7,30 @@ controller :send do
     title "Send a message"
     description "This action allows you to send a message by providing the appropriate options"
     # Acceptable Parameters
-    param :to, "The e-mail addresses of the recipients (max 50)", :type => Array
-    param :cc, "The e-mail addresses of any CC contacts (max 50)", :type => Array
-    param :bcc, "The e-mail addresses of any BCC contacts (max 50)", :type => Array
-    param :from, "The e-mail address for the From header", :type => String
-    param :sender, "The e-mail address for the Sender header", :type => String
-    param :subject, "The subject of the e-mail", :type => String
-    param :tag, "The tag of the e-mail", :type => String
-    param :reply_to, "Set the reply-to address for the mail", :type => String
-    param :plain_body, "The plain text body of the e-mail", :type => String
-    param :html_body, "The HTML body of the e-mail", :type => String
-    param :attachments, "An array of attachments for this e-mail", :type => Array
-    param :headers, "A hash of additional headers", :type => Hash
-    param :bounce, "Is this message a bounce?", :type => :boolean
+    param :to, "The e-mail addresses of the recipients (max 50)", type: Array
+    param :cc, "The e-mail addresses of any CC contacts (max 50)", type: Array
+    param :bcc, "The e-mail addresses of any BCC contacts (max 50)", type: Array
+    param :from, "The e-mail address for the From header", type: String
+    param :sender, "The e-mail address for the Sender header", type: String
+    param :subject, "The subject of the e-mail", type: String
+    param :tag, "The tag of the e-mail", type: String
+    param :reply_to, "Set the reply-to address for the mail", type: String
+    param :plain_body, "The plain text body of the e-mail", type: String
+    param :html_body, "The HTML body of the e-mail", type: String
+    param :attachments, "An array of attachments for this e-mail", type: Array
+    param :headers, "A hash of additional headers", type: Hash
+    param :bounce, "Is this message a bounce?", type: :boolean
     # Errors
-    error 'ValidationError', "The provided data was not sufficient to send an email", :attributes => {:errors => "A hash of error details"}
-    error 'NoRecipients', "There are no recipients defined to receive this message"
-    error 'NoContent', "There is no content defined for this e-mail"
-    error 'TooManyToAddresses', "The maximum number of To addresses has been reached (maximum 50)"
-    error 'TooManyCCAddresses', "The maximum number of CC addresses has been reached (maximum 50)"
-    error 'TooManyBCCAddresses', "The maximum number of BCC addresses has been reached (maximum 50)"
-    error 'FromAddressMissing', "The From address is missing and is required"
-    error 'UnauthenticatedFromAddress', "The From address is not authorised to send mail from this server"
-    error 'AttachmentMissingName', "An attachment is missing a name"
-    error 'AttachmentMissingData', "An attachment is missing data"
+    error "ValidationError", "The provided data was not sufficient to send an email", attributes: { errors: "A hash of error details" }
+    error "NoRecipients", "There are no recipients defined to receive this message"
+    error "NoContent", "There is no content defined for this e-mail"
+    error "TooManyToAddresses", "The maximum number of To addresses has been reached (maximum 50)"
+    error "TooManyCCAddresses", "The maximum number of CC addresses has been reached (maximum 50)"
+    error "TooManyBCCAddresses", "The maximum number of BCC addresses has been reached (maximum 50)"
+    error "FromAddressMissing", "The From address is missing and is required"
+    error "UnauthenticatedFromAddress", "The From address is not authorised to send mail from this server"
+    error "AttachmentMissingName", "An attachment is missing a name"
+    error "AttachmentMissingData", "An attachment is missing data"
     # Return
     returns Hash
     # Action
@@ -51,13 +51,14 @@ controller :send do
       attributes[:attachments] = []
       (params.attachments || []).each do |attachment|
         next unless attachment.is_a?(Hash)
-        attributes[:attachments] << {:name => attachment['name'], :content_type => attachment['content_type'], :data => attachment['data'], :base64 => true}
+
+        attributes[:attachments] << { name: attachment["name"], content_type: attachment["content_type"], data: attachment["data"], base64: true }
       end
-      message = OutgoingMessagePrototype.new(identity.server, request.ip, 'api', attributes)
+      message = OutgoingMessagePrototype.new(identity.server, request.ip, "api", attributes)
       message.credential = identity
       if message.valid?
         result = message.create_messages
-        {:message_id => message.message_id, :messages => result}
+        { message_id: message.message_id, messages: result }
       else
         error message.errors.first
       end
@@ -67,44 +68,43 @@ controller :send do
   action :raw do
     title "Send a raw RFC2882 message"
     description "This action allows you to send us a raw RFC2822 formatted message along with the recipients that it should be sent to. This is similar to sending a message through our SMTP service."
-    param :mail_from, "The address that should be logged as sending the message", :type => String, :required => true
-    param :rcpt_to, "The addresses this message should be sent to", :type => Array, :required => true
-    param :data, "A base64 encoded RFC2822 message to send", :type => String, :required => true
-    param :bounce, "Is this message a bounce?", :type => :boolean
+    param :mail_from, "The address that should be logged as sending the message", type: String, required: true
+    param :rcpt_to, "The addresses this message should be sent to", type: Array, required: true
+    param :data, "A base64 encoded RFC2822 message to send", type: String, required: true
+    param :bounce, "Is this message a bounce?", type: :boolean
     returns Hash
-    error 'UnauthenticatedFromAddress', "The From address is not authorised to send mail from this server"
+    error "UnauthenticatedFromAddress", "The From address is not authorised to send mail from this server"
     action do
       # Decode the raw message
       raw_message = Base64.decode64(params.data)
 
       # Parse through mail to get the from/sender headers
       mail = Mail.new(raw_message.split("\r\n\r\n", 2).first)
-      from_headers = {'from' => mail.from, 'sender' => mail.sender}
+      from_headers = { "from" => mail.from, "sender" => mail.sender }
       authenticated_domain = identity.server.find_authenticated_domain_from_headers(from_headers)
 
       # If we're not authenticated, don't continue
       if authenticated_domain.nil?
-        error 'UnauthenticatedFromAddress'
+        error "UnauthenticatedFromAddress"
       end
 
       # Store the result ready to return
-      result = {:message_id => nil, :messages => {}}
+      result = { message_id: nil, messages: {} }
       params.rcpt_to.uniq.each do |rcpt_to|
         message = identity.server.message_db.new_message
         message.rcpt_to = rcpt_to
         message.mail_from = params.mail_from
         message.raw_message = raw_message
         message.received_with_ssl = true
-        message.scope = 'outgoing'
+        message.scope = "outgoing"
         message.domain_id = authenticated_domain.id
         message.credential_id = identity.id
         message.bounce = params.bounce ? 1 : 0
         message.save
         result[:message_id] = message.message_id if result[:message_id].nil?
-        result[:messages][rcpt_to] = {:id => message.id, :token => message.token}
+        result[:messages][rcpt_to] = { id: message.id, token: message.token }
       end
       result
     end
   end
-
 end

api/structures/delivery_api_structure.rb

@@ -2,9 +2,9 @@ structure :delivery do
   basic :id
   basic :status
   basic :details
-  basic :output, :value => proc { o.output&.strip }
-  basic :sent_with_ssl, :value => proc { o.sent_with_ssl == 1 }
+  basic :output, value: proc { o.output&.strip }
+  basic :sent_with_ssl, value: proc { o.sent_with_ssl == 1 }
   basic :log_id
-  basic :time, :value => proc { o.time&.to_f }
-  basic :timestamp, :value => proc { o.timestamp.to_f }
+  basic :time, value: proc { o.time&.to_f }
+  basic :timestamp, value: proc { o.timestamp.to_f }
 end

api/structures/message_api_structure.rb

@@ -2,65 +2,65 @@ structure :message do
   basic :id
   basic :token
 
-  expansion(:status) {
+  expansion(:status) do
     {
-      :status => o.status,
-      :last_delivery_attempt => o.last_delivery_attempt ? o.last_delivery_attempt.to_f : nil,
-      :held => o.held == 1 ? true : false,
-      :hold_expiry => o.hold_expiry ? o.hold_expiry.to_f : nil
-    }
+      status: o.status,
+      last_delivery_attempt: o.last_delivery_attempt ? o.last_delivery_attempt.to_f : nil,
+      held: o.held == 1,
+      hold_expiry: o.hold_expiry ? o.hold_expiry.to_f : nil
     }
+  end
 
-  expansion(:details) {
+  expansion(:details) do
     {
-      :rcpt_to => o.rcpt_to,
-      :mail_from => o.mail_from,
-      :subject => o.subject,
-      :message_id => o.message_id,
-      :timestamp => o.timestamp.to_f,
-      :direction => o.scope,
-      :size => o.size,
-      :bounce => o.bounce,
-      :bounce_for_id => o.bounce_for_id,
-      :tag => o.tag,
-      :received_with_ssl => o.received_with_ssl
-    }
+      rcpt_to: o.rcpt_to,
+      mail_from: o.mail_from,
+      subject: o.subject,
+      message_id: o.message_id,
+      timestamp: o.timestamp.to_f,
+      direction: o.scope,
+      size: o.size,
+      bounce: o.bounce,
+      bounce_for_id: o.bounce_for_id,
+      tag: o.tag,
+      received_with_ssl: o.received_with_ssl
     }
+  end
 
-  expansion(:inspection) {
+  expansion(:inspection) do
     {
-      :inspected => o.inspected == 1 ? true : false,
-      :spam => o.spam == 1 ? true : false,
-      :spam_score => o.spam_score.to_f,
-      :threat => o.threat == 1 ? true : false,
-      :threat_details => o.threat_details
-    }
+      inspected: o.inspected == 1,
+      spam: o.spam == 1,
+      spam_score: o.spam_score.to_f,
+      threat: o.threat == 1,
+      threat_details: o.threat_details
     }
+  end
 
   expansion(:plain_body) { o.plain_body }
 
   expansion(:html_body) { o.html_body }
 
-  expansion(:attachments) {
+  expansion(:attachments) do
     o.attachments.map do |attachment|
       {
-        :filename => attachment.filename.to_s,
-        :content_type => attachment.mime_type,
-        :data => Base64.encode64(attachment.body.to_s),
-        :size => attachment.body.to_s.bytesize,
-        :hash => Digest::SHA1.hexdigest(attachment.body.to_s)
+        filename: attachment.filename.to_s,
+        content_type: attachment.mime_type,
+        data: Base64.encode64(attachment.body.to_s),
+        size: attachment.body.to_s.bytesize,
+        hash: Digest::SHA1.hexdigest(attachment.body.to_s)
       }
     end
-  }
+  end
 
   expansion(:headers) { o.headers }
 
   expansion(:raw_message) { Base64.encode64(o.raw_message) }
 
-  expansion(:activity_entries) {
+  expansion(:activity_entries) do
     {
-      :loads => o.loads,
-      :clicks => o.clicks
-    }
+      loads: o.loads,
+      clicks: o.clicks
     }
+  end
 end

app/controllers/address_endpoints_controller.rb

@@ -19,7 +19,7 @@ class AddressEndpointsController < ApplicationController
       flash[:notice] = params[:return_notice] if params[:return_notice].present?
       redirect_to_with_json [:return_to, [organization, @server, :address_endpoints]]
     else
-      render_form_errors 'new', @address_endpoint
+      render_form_errors "new", @address_endpoint
     end
   end
 
@@ -27,7 +27,7 @@ class AddressEndpointsController < ApplicationController
     if @address_endpoint.update(safe_params)
       redirect_to_with_json [organization, @server, :address_endpoints]
     else
-      render_form_errors 'edit', @address_endpoint
+      render_form_errors "edit", @address_endpoint
     end
   end
 

app/controllers/application_controller.rb

@@ -1,4 +1,4 @@
-require 'authie/session'
+require "authie/session"
 
 class ApplicationController < ActionController::Base
 
@@ -7,37 +7,37 @@ class ApplicationController < ActionController::Base
   before_action :login_required
   before_action :set_timezone
 
-  rescue_from Authie::Session::InactiveSession, :with => :auth_session_error
-  rescue_from Authie::Session::ExpiredSession, :with => :auth_session_error
-  rescue_from Authie::Session::BrowserMismatch, :with => :auth_session_error
+  rescue_from Authie::Session::InactiveSession, with: :auth_session_error
+  rescue_from Authie::Session::ExpiredSession, with: :auth_session_error
+  rescue_from Authie::Session::BrowserMismatch, with: :auth_session_error
 
   private
 
   def login_required
-    unless logged_in?
-      redirect_to login_path(:return_to => request.fullpath)
-    end
+    return if logged_in?
+
+    redirect_to login_path(return_to: request.fullpath)
   end
 
   def admin_required
     if logged_in?
       unless current_user.admin?
-        render :plain => "Not permitted"
+        render plain: "Not permitted"
       end
     else
-      redirect_to login_path(:return_to => request.fullpath)
+      redirect_to login_path(return_to: request.fullpath)
     end
   end
 
   def require_organization_owner
-    unless organization.owner == current_user
-      redirect_to organization_root_path(organization), :alert => "This page can only be accessed by the organization's owner (#{organization.owner.name})"
-    end
+    return if organization.owner == current_user
+
+    redirect_to organization_root_path(organization), alert: "This page can only be accessed by the organization's owner (#{organization.owner.name})"
   end
 
   def auth_session_error(exception)
     Rails.logger.info "AuthSessionError: #{exception.class}: #{exception.message}"
-    redirect_to login_path(:return_to => request.fullpath)
+    redirect_to login_path(return_to: request.fullpath)
   end
 
   def page_title
@@ -46,7 +46,7 @@ class ApplicationController < ActionController::Base
   helper_method :page_title
 
   def redirect_to_with_return_to(url, *args)
-    if params[:return_to].blank? || !params[:return_to].starts_with?('/')
+    if params[:return_to].blank? || !params[:return_to].starts_with?("/")
       redirect_to url_with_return_to(url), *args
     else
       redirect_to url_with_return_to(url), *args
@@ -54,7 +54,7 @@ class ApplicationController < ActionController::Base
   end
 
   def set_timezone
-    Time.zone = logged_in? ? current_user.time_zone : 'UTC'
+    Time.zone = logged_in? ? current_user.time_zone : "UTC"
   end
 
   def append_info_to_payload(payload)
@@ -64,7 +64,7 @@ class ApplicationController < ActionController::Base
   end
 
   def url_with_return_to(url)
-    if params[:return_to].blank? || !params[:return_to].starts_with?('/')
+    if params[:return_to].blank? || !params[:return_to].starts_with?("/")
       url_for(url)
     else
       params[:return_to]
@@ -83,14 +83,14 @@ class ApplicationController < ActionController::Base
     end
     respond_to do |wants|
       wants.html { redirect_to url }
-      wants.json { render :json => {:redirect_to => url} }
+      wants.json { render json: { redirect_to: url } }
     end
   end
 
   def render_form_errors(action_name, object)
     respond_to do |wants|
       wants.html { render action_name }
-      wants.json { render :json => {:form_errors => object.errors.full_messages}, :status => 422 }
+      wants.json { render json: { form_errors: object.errors.full_messages }, status: :unprocessable_entity }
     end
   end
 
@@ -102,7 +102,7 @@ class ApplicationController < ActionController::Base
           render options[:render_action]
         end
       end
-      wants.json { render :json => {:flash => {type => message}} }
+      wants.json { render json: { flash: { type => message } } }
     end
   end
 
@@ -111,7 +111,7 @@ class ApplicationController < ActionController::Base
       auth_session.invalidate!
       reset_session
     end
-    Authie::Session.start(self, :user => user)
+    Authie::Session.start(self, user: user)
     @current_user = user
   end
 

app/controllers/credentials_controller.rb

@@ -18,7 +18,7 @@ class CredentialsController < ApplicationController
     if @credential.save
       redirect_to_with_json [organization, @server, :credentials]
     else
-      render_form_errors 'new', @credential
+      render_form_errors "new", @credential
     end
   end
 
@@ -26,7 +26,7 @@ class CredentialsController < ApplicationController
     if @credential.update(params.require(:credential).permit(:name, :key, :hold))
       redirect_to_with_json [organization, @server, :credentials]
     else
-      render_form_errors 'edit', @credential
+      render_form_errors "edit", @credential
     end
   end
 

app/controllers/domains_controller.rb

@@ -28,7 +28,7 @@ class DomainsController < ApplicationController
     @domain = scope.build(params.require(:domain).permit(:name, :verification_method))
 
     if current_user.admin?
-      @domain.verification_method = 'DNS'
+      @domain.verification_method = "DNS"
       @domain.verified_at = Time.now
     end
 
@@ -39,7 +39,7 @@ class DomainsController < ApplicationController
         redirect_to_with_json [:verify, organization, @server, @domain]
       end
     else
-      render_form_errors 'new', @domain
+      render_form_errors "new", @domain
     end
   end
 
@@ -50,56 +50,57 @@ class DomainsController < ApplicationController
 
   def verify
     if @domain.verified?
-      redirect_to [organization, @server, :domains], :alert => "#{@domain.name} has already been verified."
+      redirect_to [organization, @server, :domains], alert: "#{@domain.name} has already been verified."
       return
     end
 
-    if request.post?
+    return unless request.post?
+
     case @domain.verification_method
-      when 'DNS'
+    when "DNS"
       if @domain.verify_with_dns
-          redirect_to_with_json [:setup, organization, @server, @domain], :notice => "#{@domain.name} has been verified successfully. You now need to configure your DNS records."
+        redirect_to_with_json [:setup, organization, @server, @domain], notice: "#{@domain.name} has been verified successfully. You now need to configure your DNS records."
       else
         respond_to do |wants|
           wants.html { flash.now[:alert] = "We couldn't verify your domain. Please double check you've added the TXT record correctly." }
-            wants.json { render :json => {:flash => {:alert => "We couldn't verify your domain. Please double check you've added the TXT record correctly."}}}
+          wants.json { render json: { flash: { alert: "We couldn't verify your domain. Please double check you've added the TXT record correctly." } } }
         end
       end
-      when 'Email'
+    when "Email"
       if params[:code]
         if @domain.verification_token == params[:code].to_s.strip
           @domain.verify
-            redirect_to_with_json [:setup, organization, @server, @domain], :notice => "#{@domain.name} has been verified successfully. You now need to configure your DNS records."
+          redirect_to_with_json [:setup, organization, @server, @domain], notice: "#{@domain.name} has been verified successfully. You now need to configure your DNS records."
         else
           respond_to do |wants|
             wants.html { flash.now[:alert] = "Invalid verification code. Please check and try again." }
-              wants.json { render :json => {:flash => {:alert => "Invalid verification code. Please check and try again."}}}
+            wants.json { render json: { flash: { alert: "Invalid verification code. Please check and try again." } } }
           end
         end
       elsif params[:email_address].present?
         raise Postal::Error, "Invalid email address" unless @domain.verification_email_addresses.include?(params[:email_address])
+
         AppMailer.verify_domain(@domain, params[:email_address], current_user).deliver
         if @domain.owner.is_a?(Server)
-            redirect_to_with_json verify_organization_server_domain_path(organization, @server, @domain, :email_address => params[:email_address])
+          redirect_to_with_json verify_organization_server_domain_path(organization, @server, @domain, email_address: params[:email_address])
         else
-            redirect_to_with_json verify_organization_domain_path(organization, @domain, :email_address => params[:email_address])
-          end
+          redirect_to_with_json verify_organization_domain_path(organization, @domain, email_address: params[:email_address])
         end
       end
     end
   end
 
   def setup
-    unless @domain.verified?
-      redirect_to [:verify, organization, @server, @domain], :alert => "You can't set up DNS for this domain until it has been verified."
-    end
+    return if @domain.verified?
+
+    redirect_to [:verify, organization, @server, @domain], alert: "You can't set up DNS for this domain until it has been verified."
   end
 
   def check
     if @domain.check_dns(:manual)
-      redirect_to_with_json [organization, @server, :domains], :notice => "Your DNS records for #{@domain.name} look good!"
+      redirect_to_with_json [organization, @server, :domains], notice: "Your DNS records for #{@domain.name} look good!"
     else
-      redirect_to_with_json [:setup, organization, @server, @domain], :alert => "There seems to be something wrong with your DNS records. Check below for information."
+      redirect_to_with_json [:setup, organization, @server, @domain], alert: "There seems to be something wrong with your DNS records. Check below for information."
     end
   end
 

app/controllers/http_endpoints_controller.rb

@@ -19,7 +19,7 @@ class HTTPEndpointsController < ApplicationController
       flash[:notice] = params[:return_notice] if params[:return_notice].present?
       redirect_to_with_json [:return_to, [organization, @server, :http_endpoints]]
     else
-      render_form_errors 'new', @http_endpoint
+      render_form_errors "new", @http_endpoint
     end
   end
 
@@ -27,7 +27,7 @@ class HTTPEndpointsController < ApplicationController
     if @http_endpoint.update(safe_params)
       redirect_to_with_json [organization, @server, :http_endpoints]
     else
-      render_form_errors 'edit', @http_endpoint
+      render_form_errors "edit", @http_endpoint
     end
   end
 

app/controllers/ip_addresses_controller.rb

@@ -13,7 +13,7 @@ class IPAddressesController < ApplicationController
     if @ip_address.save
       redirect_to_with_json [:edit, @ip_pool]
     else
-      render_form_errors 'new', @ip_address
+      render_form_errors "new", @ip_address
     end
   end
 
@@ -21,7 +21,7 @@ class IPAddressesController < ApplicationController
     if @ip_address.update(safe_params)
       redirect_to_with_json [:edit, @ip_pool]
     else
-      render_form_errors 'edit', @ip_address
+      render_form_errors "edit", @ip_address
     end
   end
 

app/controllers/ip_pool_rules_controller.rb

@@ -29,7 +29,7 @@ class IPPoolRulesController < ApplicationController
     if @ip_pool_rule.save
       redirect_to_with_json [organization, @server, :ip_pool_rules]
     else
-      render_form_errors 'new', @ip_pool_rule
+      render_form_errors "new", @ip_pool_rule
     end
   end
 
@@ -37,7 +37,7 @@ class IPPoolRulesController < ApplicationController
     if @ip_pool_rule.update(safe_params)
       redirect_to_with_json [organization, @server, :ip_pool_rules]
     else
-      render_form_errors 'edit', @ip_pool_rule
+      render_form_errors "edit", @ip_pool_rule
     end
   end
 

app/controllers/ip_pools_controller.rb

@@ -14,25 +14,25 @@ class IPPoolsController < ApplicationController
   def create
     @ip_pool = IPPool.new(safe_params)
     if @ip_pool.save
-      redirect_to_with_json [:edit, @ip_pool], :notice => "IP Pool has been added successfully. You can now add IP addresses to it."
+      redirect_to_with_json [:edit, @ip_pool], notice: "IP Pool has been added successfully. You can now add IP addresses to it."
     else
-      render_form_errors 'new', @ip_pool
+      render_form_errors "new", @ip_pool
     end
   end
 
   def update
     if @ip_pool.update(safe_params)
-      redirect_to_with_json [:edit, @ip_pool], :notice => "IP Pool has been updated."
+      redirect_to_with_json [:edit, @ip_pool], notice: "IP Pool has been updated."
     else
-      render_form_errors 'edit', @ip_pool
+      render_form_errors "edit", @ip_pool
     end
   end
 
   def destroy
     @ip_pool.destroy
-    redirect_to_with_json :ip_pools, :notice => "IP pool has been removed successfully."
+    redirect_to_with_json :ip_pools, notice: "IP pool has been removed successfully."
   rescue ActiveRecord::DeleteRestrictionError => e
-    redirect_to_with_json [:edit, @ip_pool], :alert => "IP pool cannot be removed because it still has associated addresses or servers."
+    redirect_to_with_json [:edit, @ip_pool], alert: "IP pool cannot be removed because it still has associated addresses or servers."
   end
 
   private

app/controllers/messages_controller.rb

@@ -1,4 +1,4 @@
-  class MessagesController < ApplicationController
+class MessagesController < ApplicationController
 
   include WithinOrganization
 
@@ -6,12 +6,12 @@
   before_action { params[:id] && @message = @server.message_db.message(params[:id].to_i) }
 
   def new
-    if params[:direction] == 'incoming'
-      @message = IncomingMessagePrototype.new(@server, request.ip, 'web-ui', {})
+    if params[:direction] == "incoming"
+      @message = IncomingMessagePrototype.new(@server, request.ip, "web-ui", {})
       @message.from = session[:test_in_from] || current_user.email_tag
       @message.to = @server.routes.order(:name).first&.description
     else
-      @message = OutgoingMessagePrototype.new(@server, request.ip, 'web-ui', {})
+      @message = OutgoingMessagePrototype.new(@server, request.ip, "web-ui", {})
       @message.to = session[:test_out_to] || current_user.email_address
       if domain = @server.domains.verified.order(:name).first
         @message.from = "test@#{domain.name}"
@@ -22,28 +22,28 @@
   end
 
   def create
-    if params[:direction] == 'incoming'
+    if params[:direction] == "incoming"
       session[:test_in_from] = params[:message][:from] if params[:message]
-      @message = IncomingMessagePrototype.new(@server, request.ip, 'web-ui', params[:message])
-      @message.attachments = [{:name => "test.txt", :content_type => "text/plain", :data => "Hello world!"}]
+      @message = IncomingMessagePrototype.new(@server, request.ip, "web-ui", params[:message])
+      @message.attachments = [{ name: "test.txt", content_type: "text/plain", data: "Hello world!" }]
     else
       session[:test_out_to] = params[:message][:to] if params[:message]
-      @message = OutgoingMessagePrototype.new(@server, request.ip, 'web-ui', params[:message])
+      @message = OutgoingMessagePrototype.new(@server, request.ip, "web-ui", params[:message])
     end
     if result = @message.create_messages
       if result.size == 1
-        redirect_to_with_json organization_server_message_path(organization, @server, result.first.last[:id]), :notice => "Message was queued successfully"
+        redirect_to_with_json organization_server_message_path(organization, @server, result.first.last[:id]), notice: "Message was queued successfully"
       else
-        redirect_to_with_json [:queue, organization, @server], :notice => "Messages queued successfully "
+        redirect_to_with_json [:queue, organization, @server], notice: "Messages queued successfully "
       end
     else
       respond_to do |wants|
         wants.html do
           flash.now[:alert] = "Your message could not be sent. Ensure that all fields are completed fully. #{result.errors.inspect}"
-          render 'new'
+          render "new"
         end
         wants.json do
-          render :json => {:flash => {:alert => "Your message could not be sent. Please check all field are completed fully."}}
+          render json: { flash: { alert: "Your message could not be sent. Please check all field are completed fully." } }
         end
       end
 
@@ -52,58 +52,62 @@
 
   def outgoing
     @searchable = true
-    get_messages('outgoing')
+    get_messages("outgoing")
     respond_to do |wants|
       wants.html
-      wants.json { render :json => {
-        :flash => flash.each_with_object({}) { |(type, message), hash| hash[type] = message},
-        :region_html => render_to_string(:partial => 'index', :formats => [:html])
-      }}
+      wants.json do
+        render json: {
+          flash: flash.each_with_object({}) { |(type, message), hash| hash[type] = message },
+          region_html: render_to_string(partial: "index", formats: [:html])
+        }
+      end
     end
   end
 
   def incoming
     @searchable = true
-    get_messages('incoming')
+    get_messages("incoming")
     respond_to do |wants|
       wants.html
-      wants.json { render :json => {
-        :flash => flash.each_with_object({}) { |(type, message), hash| hash[type] = message},
-        :region_html => render_to_string(:partial => 'index', :formats => [:html])
-      }}
+      wants.json do
+        render json: {
+          flash: flash.each_with_object({}) { |(type, message), hash| hash[type] = message },
+          region_html: render_to_string(partial: "index", formats: [:html])
+        }
+      end
     end
   end
 
   def held
-    get_messages('held')
+    get_messages("held")
   end
 
   def deliveries
-    render :json => {:html => render_to_string(:partial => 'deliveries', :locals => {:message => @message})}
+    render json: { html: render_to_string(partial: "deliveries", locals: { message: @message }) }
   end
 
   def html_raw
-    render :html => @message.html_body_without_tracking_image.html_safe
+    render html: @message.html_body_without_tracking_image.html_safe
   end
 
   def spam_checks
-    @spam_checks = @message.spam_checks.sort_by { |s| s['score']}.reverse
+    @spam_checks = @message.spam_checks.sort_by { |s| s["score"] }.reverse
   end
 
   def attachment
     if @message.attachments.size > params[:attachment].to_i
       attachment = @message.attachments[params[:attachment].to_i]
-      send_data attachment.body, :content_type => attachment.mime_type, :disposition => 'download', :filename => attachment.filename
+      send_data attachment.body, content_type: attachment.mime_type, disposition: "download", filename: attachment.filename
     else
-      redirect_to attachments_organization_server_message_path(organization, @server, @message.id), :alert => "Attachment not found. Choose an attachment from the list below."
+      redirect_to attachments_organization_server_message_path(organization, @server, @message.id), alert: "Attachment not found. Choose an attachment from the list below."
     end
   end
 
   def download
     if @message.raw_message
-      send_data @message.raw_message, :filename => "Message-#{organization.permalink}-#{@server.permalink}-#{@message.id}.eml", :content_type => "text/plain"
+      send_data @message.raw_message, filename: "Message-#{organization.permalink}-#{@server.permalink}-#{@message.id}.eml", content_type: "text/plain"
     else
-      redirect_to organization_server_message_path(organization, @server, @message.id), :alert => "We no longer have the raw message stored for this message."
+      redirect_to organization_server_message_path(organization, @server, @message.id), alert: "We no longer have the raw message stored for this message."
     end
   end
 
@@ -113,10 +117,10 @@
         @message.queued_message.queue!
         flash[:notice] = "This message will be retried shortly."
       elsif @message.held?
-        @message.add_to_message_queue(:manual => true)
+        @message.add_to_message_queue(manual: true)
         flash[:notice] = "This message has been released. Delivery will be attempted shortly."
       else
-        @message.add_to_message_queue(:manual => true)
+        @message.add_to_message_queue(manual: true)
         flash[:notice] = "This message will be redelivered shortly."
       end
     else
@@ -148,10 +152,10 @@
   private
 
   def get_messages(scope)
-    if scope == 'held'
-      options = {:where => {:held => 1}}
+    if scope == "held"
+      options = { where: { held: 1 } }
     else
-      options = {:where => {:scope => scope, :spam => false}, :order => :timestamp, :direction => 'desc'}
+      options = { where: { scope: scope, spam: false }, order: :timestamp, direction: "desc" }
 
       if @query = (params[:query] || session["msg_query_#{@server.id}_#{scope}"]).presence
         session["msg_query_#{@server.id}_#{scope}"] = @query
@@ -160,8 +164,8 @@
           flash.now[:alert] = "It doesn't appear you entered anything to filter on. Please double check your query."
         else
           @queried = true
-          if qs[:order] == 'oldest-first'
-            options[:direction] = 'asc'
+          if qs[:order] == "oldest-first"
+            options[:direction] = "asc"
           end
 
           options[:where][:rcpt_to] = qs[:to] if qs[:to]
@@ -176,7 +180,7 @@
           end
           options[:where][:tag] = qs[:tag] if qs[:tag]
           options[:where][:id] = qs[:id] if qs[:id]
-          options[:where][:spam] = true if qs[:spam] == 'yes' || qs[:spam] == 'y'
+          options[:where][:spam] = true if qs[:spam] == "yes" || qs[:spam] == "y"
           if qs[:before] || qs[:after]
             options[:where][:timestamp] = {}
             if qs[:before]
@@ -208,21 +212,19 @@
 
   def get_time_from_string(string)
     begin
-      if string =~ /\A(\d{2,4})\-(\d{2})\-(\d{2}) (\d{2})\:(\d{2})\z/
-        time = Time.new($1.to_i, $2.to_i, $3.to_i, $4.to_i, $5.to_i)
-      elsif string =~ /\A(\d{2,4})\-(\d{2})\-(\d{2})\z/
-        time = Time.new($1.to_i, $2.to_i, $3.to_i, 0)
+      if string =~ /\A(\d{2,4})-(\d{2})-(\d{2}) (\d{2}):(\d{2})\z/
+        time = Time.new(::Regexp.last_match(1).to_i, ::Regexp.last_match(2).to_i, ::Regexp.last_match(3).to_i, ::Regexp.last_match(4).to_i, ::Regexp.last_match(5).to_i)
+      elsif string =~ /\A(\d{2,4})-(\d{2})-(\d{2})\z/
+        time = Time.new(::Regexp.last_match(1).to_i, ::Regexp.last_match(2).to_i, ::Regexp.last_match(3).to_i, 0)
       else
-        time = Chronic.parse(string, :context => :past)
+        time = Chronic.parse(string, context: :past)
       end
-    rescue
+    rescue StandardError
     end
 
-    if time.nil?
-      raise TimeUndetermined, "Couldn't determine a suitable time from '#{string}'"
-    else
+    raise TimeUndetermined, "Couldn't determine a suitable time from '#{string}'" if time.nil?
+
     time
   end
-  end
 
 end

app/controllers/organization_ip_pools_controller.rb

@@ -1,7 +1,7 @@
 class OrganizationIPPoolsController < ApplicationController
 
   include WithinOrganization
-  before_action :admin_required, :only => [:assignments]
+  before_action :admin_required, only: [:assignments]
 
   def index
     @ip_pools = organization.ip_pools.order(:name)
@@ -10,7 +10,7 @@ class OrganizationIPPoolsController < ApplicationController
   def assignments
     organization.ip_pool_ids = params[:ip_pools]
     organization.save!
-    redirect_to [organization, :ip_pools], :notice => "Organization IP pools have been updated successfully"
+    redirect_to [organization, :ip_pools], notice: "Organization IP pools have been updated successfully"
   end
 
 end

app/controllers/organizations_controller.rb

@@ -1,6 +1,6 @@
 class OrganizationsController < ApplicationController
 
-  before_action :admin_required, :only => [:new, :create, :delete, :destroy]
+  before_action :admin_required, only: [:new, :create, :delete, :destroy]
 
   def index
     if current_user.admin?
@@ -17,49 +17,49 @@ class OrganizationsController < ApplicationController
     @organization = Organization.new
   end
 
+  def edit
+    @organization_obj = current_user.organizations_scope.find(organization.id)
+  end
+
   def create
     @organization = Organization.new(params.require(:organization).permit(:name, :permalink))
     @organization.owner = current_user
     if @organization.save
       redirect_to_with_json organization_root_path(@organization)
     else
-      render_form_errors 'new', @organization
+      render_form_errors "new", @organization
     end
   end
 
-  def edit
-    @organization_obj = current_user.organizations_scope.find(organization.id)
-  end
-
   def update
     @organization_obj = current_user.organizations_scope.find(organization.id)
     if @organization_obj.update(params.require(:organization).permit(:name, :time_zone))
-      redirect_to_with_json organization_settings_path(@organization_obj), :notice => "Settings for #{@organization_obj.name} have been saved successfully."
+      redirect_to_with_json organization_settings_path(@organization_obj), notice: "Settings for #{@organization_obj.name} have been saved successfully."
     else
-      render_form_errors 'edit', @organization_obj
+      render_form_errors "edit", @organization_obj
     end
   end
 
   def destroy
     unless current_user.authenticate(params[:password])
       respond_to do |wants|
-        wants.html { redirect_to organization_delete_path(@organization), :alert => "The password you entered was not valid. Please check and try again." }
-        wants.json { render :json => {:alert => "The password you entered was invalid. Please check and try again."} }
+        wants.html { redirect_to organization_delete_path(@organization), alert: "The password you entered was not valid. Please check and try again." }
+        wants.json { render json: { alert: "The password you entered was invalid. Please check and try again." } }
       end
       return
     end
 
     organization.soft_destroy
-    redirect_to_with_json root_path(:nrd => 1), :notice => "#{@organization.name} has been removed successfully."
+    redirect_to_with_json root_path(nrd: 1), notice: "#{@organization.name} has been removed successfully."
   end
 
   private
 
   def organization
-    if [:edit, :update, :delete, :destroy].include?(action_name.to_sym)
+    return unless [:edit, :update, :delete, :destroy].include?(action_name.to_sym)
+
     @organization ||= params[:org_permalink] ? current_user.organizations_scope.find_by_permalink!(params[:org_permalink]) : nil
   end
-  end
   helper_method :organization
 
 end

app/controllers/routes_controller.rb

@@ -18,7 +18,7 @@ class RoutesController < ApplicationController
     if @route.save
       redirect_to_with_json [organization, @server, :routes]
     else
-      render_form_errors 'new', @route
+      render_form_errors "new", @route
     end
   end
 
@@ -26,7 +26,7 @@ class RoutesController < ApplicationController
     if @route.update(safe_params)
       redirect_to_with_json [organization, @server, :routes]
     else
-      render_form_errors 'edit', @route
+      render_form_errors "edit", @route
     end
   end
 
@@ -38,7 +38,7 @@ class RoutesController < ApplicationController
   private
 
   def safe_params
-    params.require(:route).permit(:name, :domain_id, :spam_mode, :_endpoint, :additional_route_endpoints_array => [])
+    params.require(:route).permit(:name, :domain_id, :spam_mode, :_endpoint, additional_route_endpoints_array: [])
   end
 
 end

app/controllers/servers_controller.rb

@@ -2,7 +2,7 @@ class ServersController < ApplicationController
 
   include WithinOrganization
 
-  before_action :admin_required, :only => [:advanced, :suspend, :unsuspend]
+  before_action :admin_required, only: [:advanced, :suspend, :unsuspend]
   before_action { params[:id] && @server = organization.servers.present.find_by_permalink!(params[:id]) }
 
   def index
@@ -23,7 +23,7 @@ class ServersController < ApplicationController
     @first_date = graph_data.first.first
     @last_date = graph_data.last.first
     @graph_data = graph_data.map(&:last)
-    @messages = @server.message_db.messages(:order => 'id', :direction => 'desc', :limit => 6)
+    @messages = @server.message_db.messages(order: "id", direction: "desc", limit: 6)
   end
 
   def new
@@ -35,7 +35,7 @@ class ServersController < ApplicationController
     if @server.save
       redirect_to_with_json organization_server_path(organization, @server)
     else
-      render_form_errors 'new', @server
+      render_form_errors "new", @server
     end
   end
 
@@ -43,9 +43,9 @@ class ServersController < ApplicationController
     extra_params = [:spam_threshold, :spam_failure_threshold, :postmaster_address]
     extra_params += [:send_limit, :allow_sender, :log_smtp_data, :outbound_spam_threshold, :message_retention_days, :raw_message_retention_days, :raw_message_retention_size] if current_user.admin?
     if @server.update(safe_params(*extra_params))
-      redirect_to_with_json organization_server_path(organization, @server), :notice => "Server settings have been updated"
+      redirect_to_with_json organization_server_path(organization, @server), notice: "Server settings have been updated"
     else
-      render_form_errors 'edit', @server
+      render_form_errors "edit", @server
     end
   end
 
@@ -53,31 +53,31 @@ class ServersController < ApplicationController
     unless current_user.authenticate(params[:password])
       respond_to do |wants|
         wants.html do
-          redirect_to [:delete, organization, @server], :alert => "The password you entered was not valid. Please check and try again."
+          redirect_to [:delete, organization, @server], alert: "The password you entered was not valid. Please check and try again."
         end
         wants.json do
-          render :json => {:alert => "The password you entere was invalid. Please check and try again"}
+          render json: { alert: "The password you entere was invalid. Please check and try again" }
         end
       end
       return
     end
     @server.soft_destroy
-    redirect_to_with_json organization_root_path(organization), :notice => "#{@server.name} has been deleted successfully"
+    redirect_to_with_json organization_root_path(organization), notice: "#{@server.name} has been deleted successfully"
   end
 
   def queue
-    @messages = @server.queued_messages.order(:id => :desc).page(params[:page])
+    @messages = @server.queued_messages.order(id: :desc).page(params[:page])
     @messages_with_message = @messages.include_message
   end
 
   def suspend
     @server.suspend(params[:reason])
-    redirect_to_with_json [organization, @server], :notice => "Server has been suspended"
+    redirect_to_with_json [organization, @server], notice: "Server has been suspended"
   end
 
   def unsuspend
     @server.unsuspend
-    redirect_to_with_json [organization, @server], :notice => "Server has been unsuspended"
+    redirect_to_with_json [organization, @server], notice: "Server has been unsuspended"
   end
 
   private

app/controllers/sessions_controller.rb

@@ -1,8 +1,8 @@
 class SessionsController < ApplicationController
 
-  layout 'sub'
+  layout "sub"
 
-  skip_before_action :login_required, :only => [:new, :create, :create_with_token, :begin_password_reset, :finish_password_reset, :ip, :raise_error]
+  skip_before_action :login_required, only: [:new, :create, :create_with_token, :begin_password_reset, :finish_password_reset, :ip, :raise_error]
 
   def create
     login(User.authenticate(params[:email_address], params[:password]))
@@ -10,13 +10,13 @@ class SessionsController < ApplicationController
     redirect_to_with_return_to root_path
   rescue Postal::Errors::AuthenticationError => e
     flash.now[:alert] = "The credentials you've provided are incorrect. Please check and try again."
-    render 'new'
+    render "new"
   end
 
   def create_with_token
-    result = JWT.decode(params[:token], Postal.signing_key.to_s, 'HS256')[0]
-    if result['timestamp'] > 1.minute.ago.to_f
-      login(User.find(result['user'].to_i))
+    result = JWT.decode(params[:token], Postal.signing_key.to_s, "HS256")[0]
+    if result["timestamp"] > 1.minute.ago.to_f
+      login(User.find(result["user"].to_i))
       redirect_to root_path
     else
       destroy
@@ -33,42 +33,42 @@ class SessionsController < ApplicationController
 
   def persist
     auth_session.persist! if logged_in?
-    render :plain => "OK"
+    render plain: "OK"
   end
 
   def begin_password_reset
-    if request.post?
-      if user = User.where(:email_address => params[:email_address]).first
+    return unless request.post?
+
+    if user = User.where(email_address: params[:email_address]).first
       user.begin_password_reset(params[:return_to])
-        redirect_to login_path(:return_to => params[:return_to]), :notice => "Please check your e-mail and click the link in the e-mail we've sent you."
+      redirect_to login_path(return_to: params[:return_to]), notice: "Please check your e-mail and click the link in the e-mail we've sent you."
     else
-        redirect_to login_reset_path(:return_to => params[:return_to]), :alert => "No user exists with that e-mail address. Please check and try again."
-      end
+      redirect_to login_reset_path(return_to: params[:return_to]), alert: "No user exists with that e-mail address. Please check and try again."
     end
   end
 
   def finish_password_reset
-    @user = User.where(:password_reset_token => params[:token]).where("password_reset_token_valid_until > ?", Time.now).first
+    @user = User.where(password_reset_token: params[:token]).where("password_reset_token_valid_until > ?", Time.now).first
     if @user.nil?
-      redirect_to login_path(:return_to => params[:return_to]), :alert => "This link has expired or never existed. Please choose reset password to try again."
+      redirect_to login_path(return_to: params[:return_to]), alert: "This link has expired or never existed. Please choose reset password to try again."
     end
 
-    if request.post?
+    return unless request.post?
+
     if params[:password].blank?
       flash.now[:alert] = "You must enter a new password"
       return
     end
     @user.password = params[:password]
     @user.password_confirmation = params[:password_confirmation]
-      if @user.save
+    return unless @user.save
+
     login(@user)
-        redirect_to_with_return_to root_path, :notice => "Your new password has been set and you've been logged in."
-      end
-    end
+    redirect_to_with_return_to root_path, notice: "Your new password has been set and you've been logged in."
   end
 
   def ip
-    render :plain => "ip: #{request.ip} remote ip: #{request.remote_ip}"
+    render plain: "ip: #{request.ip} remote ip: #{request.remote_ip}"
   end
 
 end

app/controllers/smtp_endpoints_controller.rb

@@ -1,4 +1,5 @@
 class SMTPEndpointsController < ApplicationController
+
   include WithinOrganization
   before_action { @server = organization.servers.present.find_by_permalink!(params[:server_id]) }
   before_action { params[:id] && @smtp_endpoint = @server.smtp_endpoints.find_by_uuid!(params[:id]) }
@@ -17,7 +18,7 @@ class SMTPEndpointsController < ApplicationController
       flash[:notice] = params[:return_notice] if params[:return_notice].present?
       redirect_to_with_json [:return_to, [organization, @server, :smtp_endpoints]]
     else
-      render_form_errors 'new', @smtp_endpoint
+      render_form_errors "new", @smtp_endpoint
     end
   end
 
@@ -25,7 +26,7 @@ class SMTPEndpointsController < ApplicationController
     if @smtp_endpoint.update(safe_params)
       redirect_to_with_json [organization, @server, :smtp_endpoints]
     else
-      render_form_errors 'edit', @smtp_endpoint
+      render_form_errors "edit", @smtp_endpoint
     end
   end
 

app/controllers/track_domains_controller.rb

@@ -1,4 +1,5 @@
 class TrackDomainsController < ApplicationController
+
   include WithinOrganization
   before_action { @server = organization.servers.present.find_by_permalink!(params[:server_id]) }
   before_action { params[:id] && @track_domain = @server.track_domains.find_by_uuid!(params[:id]) }
@@ -16,7 +17,7 @@ class TrackDomainsController < ApplicationController
     if @track_domain.save
       redirect_to_with_json [:return_to, [organization, @server, :track_domains]]
     else
-      render_form_errors 'new', @track_domain
+      render_form_errors "new", @track_domain
     end
   end
 
@@ -24,7 +25,7 @@ class TrackDomainsController < ApplicationController
     if @track_domain.update(params.require(:track_domain).permit(:track_loads, :track_clicks, :excluded_click_domains, :ssl_enabled))
       redirect_to_with_json [organization, @server, :track_domains]
     else
-      render_form_errors 'edit', @track_domain
+      render_form_errors "edit", @track_domain
     end
   end
 
@@ -35,15 +36,15 @@ class TrackDomainsController < ApplicationController
 
   def check
     if @track_domain.check_dns
-      redirect_to_with_json [organization, @server, :track_domains], :notice => "Your CNAME for #{@track_domain.full_name} looks good!"
+      redirect_to_with_json [organization, @server, :track_domains], notice: "Your CNAME for #{@track_domain.full_name} looks good!"
     else
-      redirect_to_with_json [organization, @server, :track_domains], :alert => "There seems to be something wrong with your DNS record. Check documentation for information."
+      redirect_to_with_json [organization, @server, :track_domains], alert: "There seems to be something wrong with your DNS record. Check documentation for information."
     end
   end
 
   def toggle_ssl
-    @track_domain.update(:ssl_enabled => !@track_domain.ssl_enabled)
-    redirect_to_with_json [organization, @server, :track_domains], :notice => "SSL settings for #{@track_domain.full_name} updated successfully."
+    @track_domain.update(ssl_enabled: !@track_domain.ssl_enabled)
+    redirect_to_with_json [organization, @server, :track_domains], notice: "SSL settings for #{@track_domain.full_name} updated successfully."
   end
 
 end

app/controllers/user_controller.rb

@@ -1,16 +1,20 @@
 class UserController < ApplicationController
 
-  skip_before_action :login_required, :only => [:new, :create, :join]
+  skip_before_action :login_required, only: [:new, :create, :join]
 
   def new
-    @user_invite = UserInvite.active.find_by!(:uuid => params[:invite_token])
+    @user_invite = UserInvite.active.find_by!(uuid: params[:invite_token])
     @user = User.new
     @user.email_address = @user_invite.email_address
-    render :layout => 'sub'
+    render layout: "sub"
+  end
+
+  def edit
+    @user = User.find(current_user.id)
   end
 
   def create
-    @user_invite = UserInvite.active.find_by!(:uuid => params[:invite_token])
+    @user_invite = UserInvite.active.find_by!(uuid: params[:invite_token])
     @user = User.new(params.require(:user).permit(:first_name, :last_name, :email_address, :password, :password_confirmation))
     @user.email_verified_at = Time.now
     if @user.save
@@ -18,19 +22,19 @@ class UserController < ApplicationController
       self.current_user = @user
       redirect_to root_path
     else
-      render 'new', :layout => 'sub'
+      render "new", layout: "sub"
     end
   end
 
   def join
-    if @invite = UserInvite.where(:uuid => params[:token]).where("expires_at > ?", Time.now).first
+    if @invite = UserInvite.where(uuid: params[:token]).where("expires_at > ?", Time.now).first
       if logged_in?
         if request.post?
           @invite.accept(current_user)
-          redirect_to_with_json root_path(:nrd => 1), :notice => "Invitation has been accepted successfully. You now have access to this organization."
+          redirect_to_with_json root_path(nrd: 1), notice: "Invitation has been accepted successfully. You now have access to this organization."
         elsif request.delete?
           @invite.reject
-          redirect_to_with_json root_path(:nrd => 1), :notice => "Invitation has been rejected successfully."
+          redirect_to_with_json root_path(nrd: 1), notice: "Invitation has been rejected successfully."
         else
           @organizations = @invite.organizations.order(:name).to_a
         end
@@ -38,14 +42,10 @@ class UserController < ApplicationController
         redirect_to new_signup_path(params[:token])
       end
     else
-      redirect_to_with_json root_path(:nrd => 1), :alert => "The invite URL you have has expired. Please ask the person who invited you to re-send your invitation."
+      redirect_to_with_json root_path(nrd: 1), alert: "The invite URL you have has expired. Please ask the person who invited you to re-send your invitation."
     end
   end
 
-  def edit
-    @user = User.find(current_user.id)
-  end
-
   def update
     @user = User.find(current_user.id)
     @user.attributes = params.require(:user).permit(:first_name, :last_name, :time_zone, :email_address, :password, :password_confirmation)
@@ -56,10 +56,10 @@ class UserController < ApplicationController
       respond_to do |wants|
         wants.html do
           flash.now[:alert] = "The current password you have entered is incorrect. Please check and try again."
-          render 'edit'
+          render "edit"
         end
         wants.json do
-          render :json => {:alert => "The current password you've entered is incorrect. Please check and try again"}
+          render json: { alert: "The current password you've entered is incorrect. Please check and try again" }
         end
       end
       return
@@ -69,24 +69,24 @@ class UserController < ApplicationController
 
     if @user.save
       if email_changed
-        redirect_to_with_json verify_path(:return_to => settings_path), :notice => "Your settings have been updated successfully. As you've changed, your e-mail address you'll need to verify it before you can continue."
+        redirect_to_with_json verify_path(return_to: settings_path), notice: "Your settings have been updated successfully. As you've changed, your e-mail address you'll need to verify it before you can continue."
       else
-        redirect_to_with_json settings_path, :notice => "Your settings have been updated successfully."
+        redirect_to_with_json settings_path, notice: "Your settings have been updated successfully."
       end
     else
-      render_form_errors 'edit', @user
+      render_form_errors "edit", @user
     end
   end
 
   def verify
-    if request.post?
+    return unless request.post?
+
     if params[:code].to_s.strip == current_user.email_verification_token.to_s || (Rails.env.development? && params[:code].to_s.strip == "123456")
       current_user.verify!
-        redirect_to_with_json [:return_to, root_path], :notice => "Thanks - your e-mail address has been verified successfully."
+      redirect_to_with_json [:return_to, root_path], notice: "Thanks - your e-mail address has been verified successfully."
     else
       flash_now :alert, "The code you've entered isn't correct. Please check and try again."
     end
   end
-  end
 
 end

app/controllers/users_controller.rb

@@ -11,45 +11,44 @@ class UsersController < ApplicationController
     @user = User.new(admin: true)
   end
 
+  def edit
+  end
+
   def create
     @user = User.new(params.require(:user).permit(:email_address, :first_name, :last_name, :password, :password_confirmation, :admin, organization_ids: []))
     if @user.save
-      redirect_to_with_json :users, :notice => "#{@user.name} has been created successfully."
+      redirect_to_with_json :users, notice: "#{@user.name} has been created successfully."
     else
-      render_form_errors 'new', @user
+      render_form_errors "new", @user
     end
   end
 
-  def edit
-  end
-
   def update
     @user.attributes = params.require(:user).permit(:email_address, :first_name, :last_name, :admin, organization_ids: [])
 
     if @user == current_user && !@user.admin?
       respond_to do |wants|
         wants.html { redirect_to users_path, alert: "You cannot change your own admin status" }
-        wants.json { render :json => {:form_errors => ["You cannot change your own admin status"]}, :status => 422 }
+        wants.json { render json: { form_errors: ["You cannot change your own admin status"] }, status: :unprocessable_entity }
       end
       return
     end
 
     if @user.save
-      redirect_to_with_json :users, :notice => "Permissions for #{@user.name} have been updated successfully."
+      redirect_to_with_json :users, notice: "Permissions for #{@user.name} have been updated successfully."
     else
-      render_form_errors 'edit', @user
+      render_form_errors "edit", @user
     end
   end
 
   def destroy
     if @user == current_user
-      redirect_to_with_json :users, :alert => "You cannot delete your own user."
+      redirect_to_with_json :users, alert: "You cannot delete your own user."
       return
     end
 
     @user.destroy!
-    redirect_to_with_json :users, :notice => "#{@user.name} has been removed"
+    redirect_to_with_json :users, notice: "#{@user.name} has been removed"
   end
 
-
 end

app/controllers/webhooks_controller.rb

@@ -1,4 +1,5 @@
 class WebhooksController < ApplicationController
+
   include WithinOrganization
   before_action { @server = organization.servers.present.find_by_permalink!(params[:server_id]) }
   before_action { params[:id] && @webhook = @server.webhooks.find_by_uuid!(params[:id]) }
@@ -8,7 +9,7 @@ class WebhooksController < ApplicationController
   end
 
   def new
-    @webhook = @server.webhooks.build(:all_events => true)
+    @webhook = @server.webhooks.build(all_events: true)
   end
 
   def create
@@ -16,7 +17,7 @@ class WebhooksController < ApplicationController
     if @webhook.save
       redirect_to_with_json [organization, @server, :webhooks]
     else
-      render_form_errors 'new', @webhook
+      render_form_errors "new", @webhook
     end
   end
 
@@ -24,7 +25,7 @@ class WebhooksController < ApplicationController
     if @webhook.update(safe_params)
       redirect_to_with_json [organization, @server, :webhooks]
     else
-      render_form_errors 'edit', @webhook
+      render_form_errors "edit", @webhook
     end
   end
 
@@ -45,7 +46,7 @@ class WebhooksController < ApplicationController
   private
 
   def safe_params
-    params.require(:webhook).permit(:name, :url, :all_events, :enabled, :events => [])
+    params.require(:webhook).permit(:name, :url, :all_events, :enabled, events: [])
   end
 
 end

app/helpers/application_helper.rb

@@ -1,9 +1,9 @@
 module ApplicationHelper
 
   def format_delivery_details(server, text)
-    text.gsub!(/\<msg\:(\d+)\>/) do
-      id = $1.to_i
-      link_to("message ##{id}", organization_server_message_path(server.organization, server, id), :class => "u-link")
+    text.gsub!(/<msg:(\d+)>/) do
+      id = ::Regexp.last_match(1).to_i
+      link_to("message ##{id}", organization_server_message_path(server.organization, server, id), class: "u-link")
     end
     text.html_safe
   end
@@ -29,7 +29,7 @@ module ApplicationHelper
       unless server_domains.empty?
         s << "<optgroup label='Server Domains'>"
         for domain in server_domains
-          selected = domain == selected_domain ? "selected='selected'" : ''
+          selected = domain == selected_domain ? "selected='selected'" : ""
           s << "<option value='#{domain.id}' #{selected}>#{domain.name}</option>"
         end
         s << "</optgroup>"
@@ -39,12 +39,11 @@ module ApplicationHelper
       unless organization_domains.empty?
         s << "<optgroup label='Organization Domains'>"
         for domain in organization_domains
-          selected = domain == selected_domain ? "selected='selected'" : ''
+          selected = domain == selected_domain ? "selected='selected'" : ""
           s << "<option value='#{domain.id}' #{selected}>#{domain.name}</option>"
         end
         s << "</optgroup>"
       end
-
     end.html_safe
   end
 
@@ -57,19 +56,18 @@ module ApplicationHelper
         s << "<optgroup label='HTTP Endpoints'>"
         for endpoint in http_endpoints
           value = "#{endpoint.class}##{endpoint.uuid}"
-          selected = value == selected_value ? "selected='selected'" : ''
+          selected = value == selected_value ? "selected='selected'" : ""
           s << "<option value='#{value}' #{selected}>#{endpoint.description}</option>"
         end
         s << "</optgroup>"
       end
 
-
       smtp_endpoints = server.smtp_endpoints.order(:name).to_a
       if smtp_endpoints.present?
         s << "<optgroup label='SMTP Endpoints'>"
         for endpoint in smtp_endpoints
           value = "#{endpoint.class}##{endpoint.uuid}"
-          selected = value == selected_value ? "selected='selected'" : ''
+          selected = value == selected_value ? "selected='selected'" : ""
           s << "<option value='#{value}' #{selected}>#{endpoint.description}</option>"
         end
         s << "</optgroup>"
@@ -80,7 +78,7 @@ module ApplicationHelper
         s << "<optgroup label='Address Endpoints'>"
         for endpoint in address_endpoints
           value = "#{endpoint.class}##{endpoint.uuid}"
-          selected = value == selected_value ? "selected='selected'" : ''
+          selected = value == selected_value ? "selected='selected'" : ""
           s << "<option value='#{value}' #{selected}>#{endpoint.address}</option>"
         end
         s << "</optgroup>"
@@ -89,14 +87,14 @@ module ApplicationHelper
       unless options[:other] == false
         s << "<optgroup label='Other Options'>"
         Route::MODES.each do |mode|
-          next if mode == 'Endpoint'
-          selected = (selected_value == mode ? "selected='selected'" : '')
+          next if mode == "Endpoint"
+
+          selected = (selected_value == mode ? "selected='selected'" : "")
           text = t("route_modes.#{mode.underscore}")
           s << "<option value='#{mode}' #{selected}>#{text}</option>"
         end
         s << "</optgroup>"
       end
-
     end.html_safe
   end
 

app/jobs/action_deletion_job.rb

@@ -1,6 +1,7 @@
 class ActionDeletionJob < Postal::Job
+
   def perform
-    object = params['type'].constantize.deleted.find_by_id(params['id'])
+    object = params["type"].constantize.deleted.find_by_id(params["id"])
     if object
       log "Deleting #{params['type']}##{params['id']}"
       object.destroy
@@ -9,4 +10,5 @@ class ActionDeletionJob < Postal::Job
       log "Couldn't find deleted object #{params['type']}##{params['id']}"
     end
   end
+
 end

app/jobs/action_deletions_job.rb

@@ -1,4 +1,5 @@
 class ActionDeletionsJob < Postal::Job
+
   def perform
     Organization.deleted.each do |org|
       log "Permanently removing organization #{org.id} (#{org.permalink})"
@@ -10,4 +11,5 @@ class ActionDeletionsJob < Postal::Job
       server.destroy
     end
   end
+
 end

app/jobs/check_all_dns_job.rb

@@ -1,6 +1,7 @@
 class CheckAllDNSJob < Postal::Job
+
   def perform
-    Domain.where.not(:dns_checked_at => nil).where("dns_checked_at <= ?", 1.hour.ago).each do |domain|
+    Domain.where.not(dns_checked_at: nil).where("dns_checked_at <= ?", 1.hour.ago).each do |domain|
       log "Checking DNS for domain: #{domain.name}"
       domain.check_dns(:auto)
     end
@@ -10,4 +11,5 @@ class CheckAllDNSJob < Postal::Job
       domain.check_dns
     end
   end
+
 end

app/jobs/cleanup_authie_sessions_job.rb

@@ -1,7 +1,9 @@
-require 'authie/session'
+require "authie/session"
 
 class CleanupAuthieSessionsJob < Postal::Job
+
   def perform
     Authie::Session.cleanup
   end
+
 end

app/jobs/expire_held_messages_job.rb

@@ -1,12 +1,14 @@
 class ExpireHeldMessagesJob < Postal::Job
+
   def perform
     Server.all.each do |server|
-      messages = server.message_db.messages(:where => {
-        :status => 'Held',
-        :hold_expiry => {:less_than => Time.now.to_f}
+      messages = server.message_db.messages(where: {
+        status: "Held",
+        hold_expiry: { less_than: Time.now.to_f }
       })
 
       messages.each(&:cancel_hold)
     end
   end
+
 end

app/jobs/process_message_retention_job.rb

@@ -1,4 +1,5 @@
 class ProcessMessageRetentionJob < Postal::Job
+
   def perform
     Server.all.each do |server|
       if server.raw_message_retention_days
@@ -18,4 +19,5 @@ class ProcessMessageRetentionJob < Postal::Job
       end
     end
   end
+
 end

app/jobs/prune_suppression_lists_job.rb

@@ -1,8 +1,10 @@
 class PruneSuppressionListsJob < Postal::Job
+
   def perform
     Server.all.each do |s|
       log "Pruning suppression lists for server #{s.id}"
       s.message_db.suppression_list.prune
     end
   end
+
 end

app/jobs/prune_webhook_requests_job.rb

@@ -1,8 +1,10 @@
 class PruneWebhookRequestsJob < Postal::Job
+
   def perform
     Server.all.each do |s|
       log "Pruning webhook requests for server #{s.id}"
       s.message_db.webhooks.prune
     end
   end
+
 end

app/jobs/requeue_webhooks_job.rb

@@ -1,5 +1,7 @@
 class RequeueWebhooksJob < Postal::Job
+
   def perform
     WebhookRequest.requeue_all
   end
+
 end

app/jobs/send_notifications_job.rb

@@ -1,5 +1,7 @@
 class SendNotificationsJob < Postal::Job
+
   def perform
     Server.send_send_limit_notifications
   end
+
 end

app/jobs/send_webhook_job.rb

@@ -1,25 +1,25 @@
 class SendWebhookJob < Postal::Job
 
   def perform
-    if server = Server.find(params['server_id'])
+    if server = Server.find(params["server_id"])
       new_items = {}
-      if params['payload']
-        for key, value in params['payload']
-          if key.to_s =~ /\A\_(\w+)/
+      if params["payload"]
+        for key, value in params["payload"]
+          next unless key.to_s =~ /\A_(\w+)/
+
           begin
-              new_items[$1] = server.message_db.message(value.to_i).webhook_hash
+            new_items[::Regexp.last_match(1)] = server.message_db.message(value.to_i).webhook_hash
           rescue Postal::MessageDB::Message::NotFound
           end
         end
       end
-      end
 
       new_items.each do |key, value|
-        params['payload'].delete("_#{key}")
-        params['payload'][key] = value
+        params["payload"].delete("_#{key}")
+        params["payload"][key] = value
       end
 
-      WebhookRequest.trigger(server, params['event'], params['payload'])
+      WebhookRequest.trigger(server, params["event"], params["payload"])
     else
       log "Couldn't find server with ID #{params['server_id']}"
     end

app/jobs/sleep_job.rb

@@ -1,5 +1,7 @@
 class SleepJob < Postal::Job
+
   def perform
     sleep 5
   end
+
 end

app/jobs/tidy_raw_messages_job.rb

@@ -1,7 +1,6 @@
 class TidyRawMessagesJob < Postal::Job
 
   def perform
-
   end
 
 end

app/jobs/unqueue_message_job.rb

@@ -1,6 +1,7 @@
 class UnqueueMessageJob < Postal::Job
+
   def perform
-    if original_message = QueuedMessage.find_by_id(params['id'])
+    if original_message = QueuedMessage.find_by_id(params["id"])
       if original_message.acquire_lock
 
         log "Lock acquired for queued message #{original_message.id}"
@@ -22,7 +23,7 @@ class UnqueueMessageJob < Postal::Job
         begin
           other_messages = original_message.batchable_messages(100)
           log "Found #{other_messages.size} associated messages to process at the same time (batch key: #{original_message.batch_key})"
-        rescue
+        rescue StandardError
           original_message.unlock
           raise
         end
@@ -45,7 +46,7 @@ class UnqueueMessageJob < Postal::Job
             #
             if queued_message.server.suspended?
               log "#{log_prefix} Server is suspended. Holding message."
-              queued_message.message.create_delivery('Held', :details => "Mail server has been suspended. No e-mails can be processed at present. Contact support for assistance.")
+              queued_message.message.create_delivery("Held", details: "Mail server has been suspended. No e-mails can be processed at present. Contact support for assistance.")
               queued_message.destroy
               next
             end
@@ -53,19 +54,19 @@ class UnqueueMessageJob < Postal::Job
             # We might not be able to send this any more, check the attempts
             if queued_message.attempts >= Postal.config.general.maximum_delivery_attempts
               details = "Maximum number of delivery attempts (#{queued_message.attempts}) has been reached."
-              if queued_message.message.scope == 'incoming'
+              if queued_message.message.scope == "incoming"
                 # Send bounces to incoming e-mails when they are hard failed
                 if bounce_id = queued_message.send_bounce
                   details += " Bounce sent to sender (see message <msg:#{bounce_id}>)"
                 end
-              elsif queued_message.message.scope == 'outgoing'
+              elsif queued_message.message.scope == "outgoing"
                 # Add the recipient to the suppression list
-                if queued_message.server.message_db.suppression_list.add(:recipient, queued_message.message.rcpt_to, :reason => "too many soft fails")
+                if queued_message.server.message_db.suppression_list.add(:recipient, queued_message.message.rcpt_to, reason: "too many soft fails")
                   log "Added #{queued_message.message.rcpt_to} to suppression list because maximum attempts has been reached"
                   details += " Added #{queued_message.message.rcpt_to} to suppression list because delivery has failed #{queued_message.attempts} times."
                 end
               end
-              queued_message.message.create_delivery('HardFail', :details => details)
+              queued_message.message.create_delivery("HardFail", details: details)
               queued_message.destroy
               log "#{log_prefix} Message has reached maximum number of attempts. Hard failing."
               next
@@ -74,15 +75,15 @@ class UnqueueMessageJob < Postal::Job
             # If the raw message has been removed (removed by retention)
             unless queued_message.message.raw_message?
               log "#{log_prefix} Raw message has been removed. Not sending."
-              queued_message.message.create_delivery('HardFail', :details => "Raw message has been removed. Cannot send message.")
+              queued_message.message.create_delivery("HardFail", details: "Raw message has been removed. Cannot send message.")
               queued_message.destroy
               next
             end
 
             #
-            # Handle Incoming Messages
+            #  Handle Incoming Messages
             #
-            if queued_message.message.scope == 'incoming'
+            if queued_message.message.scope == "incoming"
               #
               # If this is a bounce, we need to handle it as such
               #
@@ -91,8 +92,8 @@ class UnqueueMessageJob < Postal::Job
                 original_messages = queued_message.message.original_messages
                 unless original_messages.empty?
                   for original_message in queued_message.message.original_messages
-                    queued_message.message.update(:bounce_for_id => original_message.id, :domain_id => original_message.domain_id)
-                    queued_message.message.create_delivery('Processed', :details => "This has been detected as a bounce message for <msg:#{original_message.id}>.")
+                    queued_message.message.update(bounce_for_id: original_message.id, domain_id: original_message.domain_id)
+                    queued_message.message.create_delivery("Processed", details: "This has been detected as a bounce message for <msg:#{original_message.id}>.")
                     original_message.bounce!(queued_message.message)
                     log "#{log_prefix} Bounce linked with message #{original_message.id}"
                   end
@@ -101,11 +102,11 @@ class UnqueueMessageJob < Postal::Job
                 end
 
                 # This message was sent to the return path but hasn't been matched
-                # to an original message. If we have a route for this, route it
-                # otherwise we'll drop at this point.
+                #  to an original message. If we have a route for this, route it
+                #  otherwise we'll drop at this point.
                 if queued_message.message.route_id.nil?
                   log "#{log_prefix} No source messages found. Hard failing."
-                  queued_message.message.create_delivery('HardFail', :details => "This message was a bounce but we couldn't link it with any outgoing message and there was no route for it.")
+                  queued_message.message.create_delivery("HardFail", details: "This message was a bounce but we couldn't link it with any outgoing message and there was no route for it.")
                   queued_message.destroy
                   next
                 end
@@ -124,7 +125,7 @@ class UnqueueMessageJob < Postal::Job
                 queued_message.message.inspect_message
                 if queued_message.message.inspected == 1
                   is_spam = queued_message.message.spam_score > queued_message.server.spam_threshold
-                  queued_message.message.update(:spam => 1) if is_spam
+                  queued_message.message.update(spam: 1) if is_spam
                   queued_message.message.append_headers(
                     "X-Postal-Spam: #{queued_message.message.spam == 1 ? 'yes' : 'no'}",
                     "X-Postal-Spam-Threshold: #{queued_message.server.spam_threshold}",
@@ -140,15 +141,15 @@ class UnqueueMessageJob < Postal::Job
               #
               if queued_message.message.spam_score >= queued_message.server.spam_failure_threshold
                 log "#{log_prefix} Message has a spam score higher than the server's maxmimum. Hard failing."
-                queued_message.message.create_delivery('HardFail', :details => "Message's spam score is higher than the failure threshold for this server. Threshold is currently #{queued_message.server.spam_failure_threshold}.")
+                queued_message.message.create_delivery("HardFail", details: "Message's spam score is higher than the failure threshold for this server. Threshold is currently #{queued_message.server.spam_failure_threshold}.")
                 queued_message.destroy
                 next
               end
 
               # If the server is in development mode, hold it
-              if queued_message.server.mode == 'Development' && !queued_message.manual?
+              if queued_message.server.mode == "Development" && !queued_message.manual?
                 log "Server is in development mode so holding."
-                queued_message.message.create_delivery('Held', :details => "Server is in development mode.")
+                queued_message.message.create_delivery("Held", details: "Server is in development mode.")
                 queued_message.destroy
                 log "#{log_prefix} Server is in development mode. Holding."
                 next
@@ -161,16 +162,16 @@ class UnqueueMessageJob < Postal::Job
               if route = queued_message.message.route
 
                 # If the route says we're holding quananteed mail and this is spam, we'll hold this
-                if route.spam_mode == 'Quarantine' && queued_message.message.spam == 1 && !queued_message.manual?
-                  queued_message.message.create_delivery('Held', :details => "Message placed into quarantine.")
+                if route.spam_mode == "Quarantine" && queued_message.message.spam == 1 && !queued_message.manual?
+                  queued_message.message.create_delivery("Held", details: "Message placed into quarantine.")
                   queued_message.destroy
                   log "#{log_prefix} Route says to quarantine spam message. Holding."
                   next
                 end
 
                 # If the route says we're holding quananteed mail and this is spam, we'll hold this
-                if route.spam_mode == 'Fail' && queued_message.message.spam == 1 && !queued_message.manual?
-                  queued_message.message.create_delivery('HardFail', :details => "Message is spam and the route specifies it should be failed.")
+                if route.spam_mode == "Fail" && queued_message.message.spam == 1 && !queued_message.manual?
+                  queued_message.message.create_delivery("HardFail", details: "Message is spam and the route specifies it should be failed.")
                   queued_message.destroy
                   log "#{log_prefix} Route says to fail spam message. Hard failing."
                   next
@@ -179,8 +180,8 @@ class UnqueueMessageJob < Postal::Job
                 #
                 # Messages that should be blindly accepted are blindly accepted
                 #
-                if route.mode == 'Accept'
-                  queued_message.message.create_delivery('Processed', :details => "Message has been accepted but not sent to any endpoints.")
+                if route.mode == "Accept"
+                  queued_message.message.create_delivery("Processed", details: "Message has been accepted but not sent to any endpoints.")
                   queued_message.destroy
                   log "#{log_prefix} Route says to accept without endpoint. Marking as processed."
                   next
@@ -189,14 +190,14 @@ class UnqueueMessageJob < Postal::Job
                 #
                 # Messages that should be accepted and held should be held
                 #
-                if route.mode == 'Hold'
+                if route.mode == "Hold"
                   log "#{log_prefix} Route says to hold message."
                   if queued_message.manual?
                     log "#{log_prefix} Message was queued manually. Marking as processed."
-                    queued_message.message.create_delivery('Processed', :details => "Message has been processed.")
+                    queued_message.message.create_delivery("Processed", details: "Message has been processed.")
                   else
                     log "#{log_prefix} Message was not queued manually. Holding."
-                    queued_message.message.create_delivery('Held', :details => "Message has been accepted but not sent to any endpoints.")
+                    queued_message.message.create_delivery("Held", details: "Message has been accepted but not sent to any endpoints.")
                   end
                   queued_message.destroy
                   next
@@ -205,29 +206,28 @@ class UnqueueMessageJob < Postal::Job
                 #
                 # Messages that should be bounced should be bounced (or rejected if they got this far)
                 #
-                if route.mode == 'Bounce' || route.mode == 'Reject'
+                if route.mode == "Bounce" || route.mode == "Reject"
                   if id = queued_message.send_bounce
-                    queued_message.message.create_delivery('HardFail', :details => "Message has been bounced because the route asks for this. See message <msg:#{id}>")
+                    queued_message.message.create_delivery("HardFail", details: "Message has been bounced because the route asks for this. See message <msg:#{id}>")
                     log "#{log_prefix} Route says to bounce. Hard failing and sent bounce (#{id})."
                   end
                   queued_message.destroy
                   next
                 end
 
-                begin
                 if @fixed_result
                   result = @fixed_result
                 else
                   case queued_message.message.endpoint
                   when SMTPEndpoint
-                      sender = cached_sender(Postal::SMTPSender, queued_message.message.recipient_domain, nil, :servers => [queued_message.message.endpoint])
+                    sender = cached_sender(Postal::SMTPSender, queued_message.message.recipient_domain, nil, servers: [queued_message.message.endpoint])
                   when HTTPEndpoint
                     sender = cached_sender(Postal::HTTPSender, queued_message.message.endpoint)
                   when AddressEndpoint
-                      sender = cached_sender(Postal::SMTPSender, queued_message.message.endpoint.domain, nil, :force_rcpt_to => queued_message.message.endpoint.address)
+                    sender = cached_sender(Postal::SMTPSender, queued_message.message.endpoint.domain, nil, force_rcpt_to: queued_message.message.endpoint.address)
                   else
                     log "#{log_prefix} Invalid endpoint for route (#{queued_message.message.endpoint_type})"
-                      queued_message.message.create_delivery('HardFail', :details => "Invalid endpoint for route.")
+                    queued_message.message.create_delivery("HardFail", details: "Invalid endpoint for route.")
                     queued_message.destroy
                     next
                   end
@@ -236,14 +236,13 @@ class UnqueueMessageJob < Postal::Job
                     @fixed_result = result
                   end
                 end
-                end
 
                 # Log the result
                 log_details = result.details
-                if result.type =='HardFail' && result.suppress_bounce
+                if result.type == "HardFail" && result.suppress_bounce
                   # The delivery hard failed, but requested that no bounce be sent
                   log "#{log_prefix} Suppressing bounce message after hard fail"
-                elsif result.type =='HardFail' && queued_message.message.send_bounces?
+                elsif result.type == "HardFail" && queued_message.message.send_bounces?
                   # If the message is a hard fail, send a bounce message for this message.
                   log "#{log_prefix} Sending a bounce because message hard failed"
                   if bounce_id = queued_message.send_bounce
@@ -252,7 +251,7 @@ class UnqueueMessageJob < Postal::Job
                   end
                 end
 
-                queued_message.message.create_delivery(result.type, :details => log_details, :output => result.output&.strip, :sent_with_ssl => result.secure, :log_id => result.log_id, :time => result.time)
+                queued_message.message.create_delivery(result.type, details: log_details, output: result.output&.strip, sent_with_ssl: result.secure, log_id: result.log_id, time: result.time)
 
                 if result.retry
                   log "#{log_prefix} Message requeued for trying later."
@@ -266,7 +265,7 @@ class UnqueueMessageJob < Postal::Job
                 end
               else
                 log "#{log_prefix} No route and/or endpoint available for processing. Hard failing."
-                queued_message.message.create_delivery('HardFail', :details => "Message does not have a route and/or endpoint available for delivery.")
+                queued_message.message.create_delivery("HardFail", details: "Message does not have a route and/or endpoint available for delivery.")
                 queued_message.destroy
                 next
               end
@@ -275,10 +274,10 @@ class UnqueueMessageJob < Postal::Job
             #
             # Handle Outgoing Messages
             #
-            if queued_message.message.scope == 'outgoing'
+            if queued_message.message.scope == "outgoing"
               if queued_message.message.domain.nil?
                 log "#{log_prefix} Message has no domain. Hard failing."
-                queued_message.message.create_delivery('HardFail', :details => "Message's domain no longer exist")
+                queued_message.message.create_delivery("HardFail", details: "Message's domain no longer exist")
                 queued_message.destroy
                 next
               end
@@ -288,7 +287,7 @@ class UnqueueMessageJob < Postal::Job
               #
               if queued_message.message.rcpt_to.blank?
                 log "#{log_prefix} Message has no to address. Hard failing."
-                queued_message.message.create_delivery('HardFail', :details => "Message doesn't have an RCPT to")
+                queued_message.message.create_delivery("HardFail", details: "Message doesn't have an RCPT to")
                 queued_message.destroy
                 next
               end
@@ -298,7 +297,7 @@ class UnqueueMessageJob < Postal::Job
               #
               if !queued_message.manual? && queued_message.message.credential && queued_message.message.credential.hold?
                 log "#{log_prefix} Credential wants us to hold messages. Holding."
-                queued_message.message.create_delivery('Held', :details => "Credential is configured to hold all messages authenticated by it.")
+                queued_message.message.create_delivery("Held", details: "Credential is configured to hold all messages authenticated by it.")
                 queued_message.destroy
                 next
               end
@@ -308,15 +307,15 @@ class UnqueueMessageJob < Postal::Job
               #
               if !queued_message.manual? && sl = queued_message.server.message_db.suppression_list.get(:recipient, queued_message.message.rcpt_to)
                 log "#{log_prefix} Recipient is on the suppression list. Holding."
-                queued_message.message.create_delivery('Held', :details => "Recipient (#{queued_message.message.rcpt_to}) is on the suppression list (reason: #{sl['reason']})")
+                queued_message.message.create_delivery("Held", details: "Recipient (#{queued_message.message.rcpt_to}) is on the suppression list (reason: #{sl['reason']})")
                 queued_message.destroy
                 next
               end
 
               # Extract a tag and add it to the message if one doesn't exist
-              if queued_message.message.tag.nil? && tag = queued_message.message.headers['x-postal-tag']
+              if queued_message.message.tag.nil? && tag = queued_message.message.headers["x-postal-tag"]
                 log "#{log_prefix} Added tag #{tag.last}"
-                queued_message.message.update(:tag => tag.last)
+                queued_message.message.update(tag: tag.last)
               end
 
               # Parse the content of the message as appropriate
@@ -331,53 +330,53 @@ class UnqueueMessageJob < Postal::Job
                 queued_message.message.inspect_message
                 if queued_message.message.inspected == 1
                   if queued_message.message.spam_score >= queued_message.server.outbound_spam_threshold
-                    queued_message.message.update(:spam => 1)
+                    queued_message.message.update(spam: 1)
                   end
                   log "#{log_prefix} Message inspected successfully"
                 end
               end
 
               if queued_message.message.spam == 1
-                queued_message.message.create_delivery("HardFail", :details => "Message is likely spam. Threshold is #{queued_message.server.outbound_spam_threshold} and the message scored #{queued_message.message.spam_score}.")
+                queued_message.message.create_delivery("HardFail", details: "Message is likely spam. Threshold is #{queued_message.server.outbound_spam_threshold} and the message scored #{queued_message.message.spam_score}.")
                 queued_message.destroy
                 log "#{log_prefix} Message is spam (#{queued_message.message.spam_score}). Hard failing."
                 next
               end
 
               # Add outgoing headers
-              if !queued_message.message.has_outgoing_headers?
+              unless queued_message.message.has_outgoing_headers?
                 queued_message.message.add_outgoing_headers
               end
 
               # Check send limits
               if queued_message.server.send_limit_exceeded?
                 # If we're over the limit, we're going to be holding this message
-                queued_message.server.update_columns(:send_limit_exceeded_at => Time.now, :send_limit_approaching_at => nil)
-                queued_message.message.create_delivery('Held', :details => "Message held because send limit (#{queued_message.server.send_limit}) has been reached.")
+                queued_message.server.update_columns(send_limit_exceeded_at: Time.now, send_limit_approaching_at: nil)
+                queued_message.message.create_delivery("Held", details: "Message held because send limit (#{queued_message.server.send_limit}) has been reached.")
                 queued_message.destroy
                 log "#{log_prefix} Server send limit has been exceeded. Holding."
                 next
               elsif queued_message.server.send_limit_approaching?
                 # If we're approaching the limit, just say we are but continue to process the message
-                queued_message.server.update_columns(:send_limit_approaching_at => Time.now, :send_limit_exceeded_at => nil)
+                queued_message.server.update_columns(send_limit_approaching_at: Time.now, send_limit_exceeded_at: nil)
               else
-                queued_message.server.update_columns(:send_limit_approaching_at => nil, :send_limit_exceeded_at => nil)
+                queued_message.server.update_columns(send_limit_approaching_at: nil, send_limit_exceeded_at: nil)
               end
 
               # Update the live stats for this message.
               queued_message.message.database.live_stats.increment(queued_message.message.scope)
 
               # If the server is in development mode, hold it
-              if queued_message.server.mode == 'Development' && !queued_message.manual?
+              if queued_message.server.mode == "Development" && !queued_message.manual?
                 log "Server is in development mode so holding."
-                queued_message.message.create_delivery('Held', :details => "Server is in development mode.")
+                queued_message.message.create_delivery("Held", details: "Server is in development mode.")
                 queued_message.destroy
                 log "#{log_prefix} Server is in development mode. Holding."
                 next
               end
 
               # Send the outgoing message to the SMTP sender
-              begin
+
               if @fixed_result
                 result = @fixed_result
               else
@@ -387,36 +386,31 @@ class UnqueueMessageJob < Postal::Job
                   @fixed_result = result
                 end
               end
-              end
 
               #
               # If the message has been hard failed, check to see how many other recent hard fails we've had for the address
               # and if there are more than 2, suppress the address for 30 days.
               #
-              if result.type == 'HardFail'
-                recent_hard_fails = queued_message.server.message_db.select(:messages, :where => {:rcpt_to => queued_message.message.rcpt_to, :status => 'HardFail', :timestamp => {:greater_than => 24.hours.ago.to_f}}, :count => true)
-                if recent_hard_fails >= 1
-                  if queued_message.server.message_db.suppression_list.add(:recipient, queued_message.message.rcpt_to, :reason => "too many hard fails")
+              if result.type == "HardFail"
+                recent_hard_fails = queued_message.server.message_db.select(:messages, where: { rcpt_to: queued_message.message.rcpt_to, status: "HardFail", timestamp: { greater_than: 24.hours.ago.to_f } }, count: true)
+                if recent_hard_fails >= 1 && queued_message.server.message_db.suppression_list.add(:recipient, queued_message.message.rcpt_to, reason: "too many hard fails")
                   log "#{log_prefix} Added #{queued_message.message.rcpt_to} to suppression list because #{recent_hard_fails} hard fails in 24 hours"
                   result.details += "." if result.details =~ /\.\z/
                   result.details += " Recipient added to suppression list (too many hard fails)."
                 end
               end
-              end
 
               #
               # If a message is sent successfully, remove the users from the suppression list
               #
-              if result.type == 'Sent'
-                if queued_message.server.message_db.suppression_list.remove(:recipient, queued_message.message.rcpt_to)
+              if result.type == "Sent" && queued_message.server.message_db.suppression_list.remove(:recipient, queued_message.message.rcpt_to)
                 log "#{log_prefix} Removed #{queued_message.message.rcpt_to} from suppression list because success"
                 result.details += "." if result.details =~ /\.\z/
                 result.details += " Recipient removed from suppression list."
               end
-              end
 
               # Log the result
-              queued_message.message.create_delivery(result.type, :details => result.details, :output => result.output, :sent_with_ssl => result.secure, :log_id => result.log_id, :time => result.time)
+              queued_message.message.create_delivery(result.type, details: result.details, output: result.output, sent_with_ssl: result.secure, log_id: result.log_id, time: result.time)
               if result.retry
                 log "#{log_prefix} Message requeued for trying later."
                 queued_message.retry_later(result.retry.is_a?(Integer) ? result.retry : nil)
@@ -425,17 +419,16 @@ class UnqueueMessageJob < Postal::Job
                 queued_message.destroy
               end
             end
-
-          rescue => e
+          rescue StandardError => e
             log "#{log_prefix} Internal error: #{e.class}: #{e.message}"
             e.backtrace.each { |e| log("#{log_prefix} #{e}") }
             queued_message.retry_later
             log "#{log_prefix} Queued message was unlocked"
             if defined?(Raven)
-              Raven.capture_exception(e, :extra => {:job_id => self.id, :server_id => queued_message.server_id, :message_id => queued_message.message_id})
+              Raven.capture_exception(e, extra: { job_id: self.id, server_id: queued_message.server_id, message_id: queued_message.message_id })
             end
             if queued_message.message
-              queued_message.message.create_delivery("Error", :details => "An internal error occurred while sending this message. This message will be retried automatically. If this persists, contact support for assistance.", :output => "#{e.class}: #{e.message}", :log_id => "J-#{self.id}")
+              queued_message.message.create_delivery("Error", details: "An internal error occurred while sending this message. This message will be retried automatically. If this persists, contact support for assistance.", output: "#{e.class}: #{e.message}", log_id: "J-#{self.id}")
             end
           end
         end
@@ -447,7 +440,11 @@ class UnqueueMessageJob < Postal::Job
       log "No queued message with ID #{params['id']} was available for processing."
     end
   ensure
-    @sender&.finish rescue nil
+    begin
+      @sender&.finish
+    rescue StandardError
+      nil
+    end
   end
 
   private
@@ -459,4 +456,5 @@ class UnqueueMessageJob < Postal::Job
       sender
     end
   end
+
 end

app/jobs/webhook_delivery_job.rb

@@ -1,6 +1,7 @@
 class WebhookDeliveryJob < Postal::Job
+
   def perform
-    if webhook_request = WebhookRequest.find_by_id(params['id'])
+    if webhook_request = WebhookRequest.find_by_id(params["id"])
       if webhook_request.deliver
         log "Succesfully delivered"
       else
@@ -10,4 +11,5 @@ class WebhookDeliveryJob < Postal::Job
       log "No webhook request found with ID '#{params['id']}'"
     end
   end
+
 end

app/mailers/app_mailer.rb

@@ -2,50 +2,50 @@ class AppMailer < ApplicationMailer
 
   def verify_email_address(user)
     @user = user
-    mail :to => @user.email_address, :subject => "Verify your new e-mail address"
+    mail to: @user.email_address, subject: "Verify your new e-mail address"
   end
 
   def new_user(user)
     @user = user
-    mail :to => @user.email_address, :subject => "Welcome to Postal"
+    mail to: @user.email_address, subject: "Welcome to Postal"
   end
 
   def user_invite(user_invite, organization)
     @user_invite = user_invite
     @organization = organization
-    mail :to => @user_invite.email_address, :subject => "Access the #{organization.name} organization on Postal"
+    mail to: @user_invite.email_address, subject: "Access the #{organization.name} organization on Postal"
   end
 
   def verify_domain(domain, email_address, user)
     @domain = domain
     @email_address = email_address
     @user = user
-    mail :to => email_address, :subject => "Verify your ownership of #{@domain.name}"
+    mail to: email_address, subject: "Verify your ownership of #{@domain.name}"
   end
 
   def password_reset(user, return_to = nil)
     @user = user
     @return_to = return_to
-    mail :to => @user.email_address, :subject => "Reset your Postal password"
+    mail to: @user.email_address, subject: "Reset your Postal password"
   end
 
   def server_send_limit_approaching(server)
     @server = server
-    mail :to => @server.organization.notification_addresses, :subject => "[#{server.full_permalink}] Mail server is approaching its send limit"
+    mail to: @server.organization.notification_addresses, subject: "[#{server.full_permalink}] Mail server is approaching its send limit"
   end
 
   def server_send_limit_exceeded(server)
     @server = server
-    mail :to => @server.organization.notification_addresses, :subject => "[#{server.full_permalink}] Mail server has exceeded its send limit"
+    mail to: @server.organization.notification_addresses, subject: "[#{server.full_permalink}] Mail server has exceeded its send limit"
   end
 
   def server_suspended(server)
     @server = server
-    mail :to => @server.organization.notification_addresses, :subject => "[#{server.full_permalink}] Your mail server has been suspended"
+    mail to: @server.organization.notification_addresses, subject: "[#{server.full_permalink}] Your mail server has been suspended"
   end
 
   def test_message(recipient)
-    mail :to => recipient, :subject => "Postal SMTP Test Message"
+    mail to: recipient, subject: "Postal SMTP Test Message"
   end
 
 end

app/mailers/application_mailer.rb

@@ -1,4 +1,6 @@
 class ApplicationMailer < ActionMailer::Base
-  default :from => "#{Postal.smtp_from_name} <#{Postal.smtp_from_address}>"
+
+  default from: "#{Postal.smtp_from_name} <#{Postal.smtp_from_address}>"
   layout false
+
 end

app/models/additional_route_endpoint.rb

@@ -13,22 +13,21 @@
 class AdditionalRouteEndpoint < ApplicationRecord
 
   belongs_to :route
-  belongs_to :endpoint, :polymorphic => true
+  belongs_to :endpoint, polymorphic: true
 
   validate :validate_endpoint_belongs_to_server
   validate :validate_wildcard
   validate :validate_uniqueness
 
   def self.find_by_endpoint(endpoint)
-    class_name, id = endpoint.split('#', 2)
+    class_name, id = endpoint.split("#", 2)
     unless Route::ENDPOINT_TYPES.include?(class_name)
       raise Postal::Error, "Invalid endpoint class name '#{class_name}'"
     end
-    if uuid = class_name.constantize.find_by_uuid(id)
-      where(:endpoint_type => class_name, :endpoint_id => uuid).first
-    else
-      nil
-    end
+
+    return unless uuid = class_name.constantize.find_by_uuid(id)
+
+    where(endpoint_type: class_name, endpoint_id: uuid).first
   end
 
   def _endpoint
@@ -38,39 +37,37 @@ class AdditionalRouteEndpoint < ApplicationRecord
   def _endpoint=(value)
     if value.blank?
       self.endpoint = nil
-    else
-      if value =~ /\#/
-        class_name, id = value.split('#', 2)
+    elsif value =~ /\#/
+      class_name, id = value.split("#", 2)
       unless Route::ENDPOINT_TYPES.include?(class_name)
         raise Postal::Error, "Invalid endpoint class name '#{class_name}'"
       end
+
       self.endpoint = class_name.constantize.find_by_uuid(id)
     else
       self.endpoint = nil
     end
   end
-  end
 
   private
 
   def validate_endpoint_belongs_to_server
-    if self.endpoint && self.endpoint&.server != self.route.server
+    return unless endpoint && endpoint&.server != route.server
+
     errors.add :endpoint, :invalid
   end
-  end
 
   def validate_uniqueness
-    if self.endpoint == self.route.endpoint
+    return unless endpoint == route.endpoint
+
     errors.add :base, "You can only add an endpoint to a route once"
   end
-  end
 
   def validate_wildcard
-    if self.route.wildcard?
-      if self.endpoint_type == 'SMTPEndpoint' || self.endpoint_type == 'AddressEndpoint'
+    return unless route.wildcard?
+    return unless endpoint_type == "SMTPEndpoint" || endpoint_type == "AddressEndpoint"
+
     errors.add :base, "SMTP or address endpoints are not permitted on wildcard routes"
   end
-    end
-  end
 
 end

app/models/address_endpoint.rb

@@ -16,10 +16,10 @@ class AddressEndpoint < ApplicationRecord
   include HasUUID
 
   belongs_to :server
-  has_many :routes, :as => :endpoint
-  has_many :additional_route_endpoints, :dependent => :destroy, :as => :endpoint
+  has_many :routes, as: :endpoint
+  has_many :additional_route_endpoints, dependent: :destroy, as: :endpoint
 
-  validates :address, :presence => true, :format => {:with => /@/}, :uniqueness => {:scope => [:server_id], :message => "has already been added"}
+  validates :address, presence: true, format: { with: /@/ }, uniqueness: { scope: [:server_id], message: "has already been added" }
 
   before_destroy :update_routes
 
@@ -28,15 +28,15 @@ class AddressEndpoint < ApplicationRecord
   end
 
   def update_routes
-    self.routes.each { |r| r.update(:endpoint => nil, :mode => 'Reject') }
+    routes.each { |r| r.update(endpoint: nil, mode: "Reject") }
   end
 
   def description
-    self.address
+    address
   end
 
   def domain
-    address.split('@', 2).last
+    address.split("@", 2).last
   end
 
 end

app/models/application_record.rb

@@ -1,5 +1,7 @@
 class ApplicationRecord < ActiveRecord::Base
+
   self.abstract_class = true
-  self.inheritance_column = 'sti_type'
+  self.inheritance_column = "sti_type"
   nilify_blanks
+
 end

app/models/concerns/has_message.rb

@@ -5,7 +5,7 @@ module HasMessage
   end
 
   def message
-    @message ||= self.server.message_db.message(self.message_id)
+    @message ||= server.message_db.message(message_id)
   end
 
   def message=(message)
@@ -14,6 +14,7 @@ module HasMessage
   end
 
   module ClassMethods
+
     def include_message
       queued_messages = all.to_a
       server_ids = queued_messages.map(&:server_id).uniq
@@ -22,10 +23,11 @@ module HasMessage
       elsif server_ids.size > 1
         raise Postal::Error, "'include_message' can only be used on collections of messages from the same server"
       end
+
       message_ids = queued_messages.map(&:message_id).uniq
       server = queued_messages.first&.server
-      messages = server.message_db.messages(:where => {:id => message_ids}).each_with_object({}) do |message, hash|
-        hash[message.id] = message
+      messages = server.message_db.messages(where: { id: message_ids }).index_by do |message|
+        message.id
       end
       queued_messages.each do |queued_message|
         if m = messages[queued_message.message_id]
@@ -33,6 +35,7 @@ module HasMessage
         end
       end
     end
+
   end
 
 end

app/models/concerns/has_soft_destroy.rb

@@ -3,16 +3,16 @@ module HasSoftDestroy
   def self.included(base)
     base.define_callbacks :soft_destroy
     base.class_eval do
-      scope :deleted, -> { where.not(:deleted_at => nil) }
-      scope :present, -> { where(:deleted_at => nil) }
+      scope :deleted, -> { where.not(deleted_at: nil) }
+      scope :present, -> { where(deleted_at: nil) }
     end
   end
 
   def soft_destroy
     run_callbacks :soft_destroy do
       self.deleted_at = Time.now
-      self.save!
-      ActionDeletionJob.queue(:main, :type => self.class.name, :id => self.id)
+      save!
+      ActionDeletionJob.queue(:main, type: self.class.name, id: id)
     end
   end
 

app/models/concerns/has_uuid.rb

@@ -1,11 +1,13 @@
 module HasUUID
+
   def self.included(base)
     base.class_eval do
-      random_string :uuid, :type => :uuid, :unique => true
+      random_string :uuid, type: :uuid, unique: true
     end
   end
 
   def to_param
     uuid
   end
+
 end

app/models/credential.rb

@@ -21,11 +21,11 @@ class Credential < ApplicationRecord
 
   belongs_to :server
 
-  TYPES = ['SMTP', 'API', 'SMTP-IP']
+  TYPES = ["SMTP", "API", "SMTP-IP"]
 
-  validates :key, :presence => true, :uniqueness => true
-  validates :type, :inclusion => {:in => TYPES}
-  validates :name, :presence => true
+  validates :key, presence: true, uniqueness: true
+  validates :type, inclusion: { in: TYPES }
+  validates :name, presence: true
   validate :validate_key_cannot_be_changed
   validate :validate_key_for_smtp_ip
 
@@ -33,10 +33,9 @@ class Credential < ApplicationRecord
 
   before_validation :generate_key
 
-
   def generate_key
-    return if self.type == 'SMTP-IP'
-    return if self.persisted?
+    return if type == "SMTP-IP"
+    return if persisted?
 
     self.key = SecureRandomString.new(24)
   end
@@ -51,26 +50,26 @@ class Credential < ApplicationRecord
 
   def usage_type
     if last_used_at.nil?
-      'Unused'
+      "Unused"
     elsif last_used_at < 1.year.ago
-      'Inactive'
+      "Inactive"
     elsif last_used_at < 6.months.ago
-      'Dormant'
+      "Dormant"
     elsif last_used_at < 1.month.ago
-      'Quiet'
+      "Quiet"
     else
-      'Active'
+      "Active"
     end
   end
 
   def to_smtp_plain
-    Base64.encode64("\0XX\0#{self.key}").strip
+    Base64.encode64("\0XX\0#{key}").strip
   end
 
   def ipaddr
-    return unless type == 'SMTP-IP'
+    return unless type == "SMTP-IP"
 
-    @ipaddr ||= IPAddr.new(self.key)
+    @ipaddr ||= IPAddr.new(key)
   rescue IPAddr::InvalidAddressError
     nil
   end
@@ -80,15 +79,15 @@ class Credential < ApplicationRecord
   def validate_key_cannot_be_changed
     return if new_record?
     return unless key_changed?
-    return if type == 'SMTP-IP'
+    return if type == "SMTP-IP"
 
     errors.add :key, "cannot be changed"
   end
 
   def validate_key_for_smtp_ip
-    return unless type == 'SMTP-IP'
+    return unless type == "SMTP-IP"
 
-    IPAddr.new(self.key.to_s)
+    IPAddr.new(key.to_s)
   rescue IPAddr::InvalidAddressError
     errors.add :key, "must be a valid IPv4 or IPv6 address"
   end

app/models/domain.rb

@@ -34,39 +34,39 @@
 #  index_domains_on_uuid       (uuid)
 #
 
-require 'resolv'
+require "resolv"
 
 class Domain < ApplicationRecord
 
   include HasUUID
 
-  require_dependency 'domain/dns_checks'
-  require_dependency 'domain/dns_verification'
+  require_dependency "domain/dns_checks"
+  require_dependency "domain/dns_verification"
 
-  VERIFICATION_EMAIL_ALIASES = ['webmaster', 'postmaster', 'admin', 'administrator', 'hostmaster']
+  VERIFICATION_EMAIL_ALIASES = ["webmaster", "postmaster", "admin", "administrator", "hostmaster"]
 
-  belongs_to :server, :optional => true
-  belongs_to :owner, :optional => true, :polymorphic => true
-  has_many :routes, :dependent => :destroy
-  has_many :track_domains, :dependent => :destroy
+  belongs_to :server, optional: true
+  belongs_to :owner, optional: true, polymorphic: true
+  has_many :routes, dependent: :destroy
+  has_many :track_domains, dependent: :destroy
 
-  VERIFICATION_METHODS = ['DNS', 'Email']
+  VERIFICATION_METHODS = ["DNS", "Email"]
 
-  validates :name, :presence => true, :format => {:with => /\A[a-z0-9\-\.]*\z/}, :uniqueness => {:scope => [:owner_type, :owner_id], :message => "is already added"}
-  validates :verification_method, :inclusion => {:in => VERIFICATION_METHODS}
+  validates :name, presence: true, format: { with: /\A[a-z0-9\-.]*\z/ }, uniqueness: { scope: [:owner_type, :owner_id], message: "is already added" }
+  validates :verification_method, inclusion: { in: VERIFICATION_METHODS }
 
-  random_string :dkim_identifier_string, :type => :chars, :length => 6, :unique => true, :upper_letters_only => true
+  random_string :dkim_identifier_string, type: :chars, length: 6, unique: true, upper_letters_only: true
 
   before_create :generate_dkim_key
 
-  scope :verified, -> { where.not(:verified_at => nil) }
+  scope :verified, -> { where.not(verified_at: nil) }
 
-  when_attribute :verification_method, :changes_to => :anything do
+  when_attribute :verification_method, changes_to: :anything do
     before_save do
-      if self.verification_method == 'DNS'
-        self.verification_token = Nifty::Utils::RandomString.generate(:length => 32)
-      elsif self.verification_method == 'Email'
-        self.verification_token = rand(999999).to_s.ljust(6, '0')
+      if verification_method == "DNS"
+        self.verification_token = Nifty::Utils::RandomString.generate(length: 32)
+      elsif verification_method == "Email"
+        self.verification_token = rand(999_999).to_s.ljust(6, "0")
       else
         self.verification_token = nil
       end
@@ -79,13 +79,13 @@ class Domain < ApplicationRecord
 
   def verify
     self.verified_at = Time.now
-    self.save!
+    save!
   end
 
   def parent_domains
-    parts = self.name.split('.')
-    parts[0,parts.size-1].each_with_index.map do |p, i|
-      parts[i..-1].join('.')
+    parts = name.split(".")
+    parts[0, parts.size - 1].each_with_index.map do |p, i|
+      parts[i..-1].join(".")
     end
   end
 
@@ -94,7 +94,7 @@ class Domain < ApplicationRecord
   end
 
   def dkim_key
-    @dkim_key ||= OpenSSL::PKey::RSA.new(self.dkim_private_key)
+    @dkim_key ||= OpenSSL::PKey::RSA.new(dkim_private_key)
   end
 
   def to_param
@@ -114,12 +114,12 @@ class Domain < ApplicationRecord
   end
 
   def dkim_record
-    public_key = dkim_key.public_key.to_s.gsub(/\-+[A-Z ]+\-+\n/, '').gsub(/\n/, '')
+    public_key = dkim_key.public_key.to_s.gsub(/-+[A-Z ]+-+\n/, "").gsub(/\n/, "")
     "v=DKIM1; t=s; h=sha256; p=#{public_key};"
   end
 
   def dkim_identifier
-    Postal.config.dns.dkim_identifier + "-#{self.dkim_identifier_string}"
+    Postal.config.dns.dkim_identifier + "-#{dkim_identifier_string}"
   end
 
   def dkim_record_name
@@ -127,7 +127,7 @@ class Domain < ApplicationRecord
   end
 
   def return_path_domain
-    "#{Postal.config.dns.custom_return_path_prefix}.#{self.name}"
+    "#{Postal.config.dns.custom_return_path_prefix}.#{name}"
   end
 
   def nameservers
@@ -135,7 +135,7 @@ class Domain < ApplicationRecord
   end
 
   def resolver
-    @resolver ||= Postal.config.general.use_local_ns_for_domains? ? Resolv::DNS.new : Resolv::DNS.new(:nameserver => nameservers)
+    @resolver ||= Postal.config.general.use_local_ns_for_domains? ? Resolv::DNS.new : Resolv::DNS.new(nameserver: nameservers)
   end
 
   private
@@ -143,15 +143,17 @@ class Domain < ApplicationRecord
   def get_nameservers
     local_resolver = Resolv::DNS.new
     ns_records = []
-    parts = name.split('.')
+    parts = name.split(".")
     (parts.size - 1).times do |n|
-      d = parts[n, parts.size - n + 1].join('.')
+      d = parts[n, parts.size - n + 1].join(".")
       ns_records = local_resolver.getresources(d, Resolv::DNS::Resource::IN::NS).map { |s| s.name.to_s }
-      break unless ns_records.blank?
+      break if ns_records.present?
     end
     return [] if ns_records.blank?
-    ns_records = ns_records.map{|r| local_resolver.getresources(r, Resolv::DNS::Resource::IN::A).map { |s| s.address.to_s} }.flatten
+
+    ns_records = ns_records.map { |r| local_resolver.getresources(r, Resolv::DNS::Resource::IN::A).map { |s| s.address.to_s } }.flatten
     return [] if ns_records.blank?
+
     ns_records
   end
 

app/models/domain/dns_checks.rb

@@ -1,9 +1,9 @@
-require 'resolv'
+require "resolv"
 
 class Domain
 
   def dns_ok?
-    spf_status == 'OK' && dkim_status == 'OK' && ['OK', 'Missing'].include?(self.mx_status) && ['OK', 'Missing'].include?(self.return_path_status)
+    spf_status == "OK" && dkim_status == "OK" && ["OK", "Missing"].include?(mx_status) && ["OK", "Missing"].include?(return_path_status)
   end
 
   def dns_checked?
@@ -16,21 +16,21 @@ class Domain
     check_mx_records
     check_return_path_record
     self.dns_checked_at = Time.now
-    self.save!
-    if source == :auto && !dns_ok? && self.owner.is_a?(Server)
-      WebhookRequest.trigger(self.owner, 'DomainDNSError', {
-        :server => self.owner.webhook_hash,
-        :domain => self.name,
-        :uuid => self.uuid,
-        :dns_checked_at => self.dns_checked_at.to_f,
-        :spf_status => self.spf_status,
-        :spf_error => self.spf_error,
-        :dkim_status => self.dkim_status,
-        :dkim_error => self.dkim_error,
-        :mx_status => self.mx_status,
-        :mx_error => self.mx_error,
-        :return_path_status => self.return_path_status,
-        :return_path_error => self.return_path_error
+    save!
+    if source == :auto && !dns_ok? && owner.is_a?(Server)
+      WebhookRequest.trigger(owner, "DomainDNSError", {
+        server: owner.webhook_hash,
+        domain: name,
+        uuid: uuid,
+        dns_checked_at: dns_checked_at.to_f,
+        spf_status: spf_status,
+        spf_error: spf_error,
+        dkim_status: dkim_status,
+        dkim_error: dkim_error,
+        mx_status: mx_status,
+        mx_error: mx_error,
+        return_path_status: return_path_status,
+        return_path_error: return_path_error
       })
     end
     dns_ok?
@@ -41,19 +41,19 @@ class Domain
   #
 
   def check_spf_record
-    result = resolver.getresources(self.name, Resolv::DNS::Resource::IN::TXT)
-    spf_records = result.map(&:data).select { |d| d =~ /\Av=spf1/}
+    result = resolver.getresources(name, Resolv::DNS::Resource::IN::TXT)
+    spf_records = result.map(&:data).select { |d| d =~ /\Av=spf1/ }
     if spf_records.empty?
-      self.spf_status = 'Missing'
-      self.spf_error = 'No SPF record exists for this domain'
+      self.spf_status = "Missing"
+      self.spf_error = "No SPF record exists for this domain"
     else
-      suitable_spf_records = spf_records.select { |d| d =~ /include\:\s*#{Regexp.escape(Postal.config.dns.spf_include)}/}
+      suitable_spf_records = spf_records.select { |d| d =~ /include:\s*#{Regexp.escape(Postal.config.dns.spf_include)}/ }
       if suitable_spf_records.empty?
-        self.spf_status = 'Invalid'
+        self.spf_status = "Invalid"
         self.spf_error = "An SPF record exists but it doesn't include #{Postal.config.dns.spf_include}"
         false
       else
-        self.spf_status = 'OK'
+        self.spf_status = "OK"
         self.spf_error = nil
         true
       end
@@ -74,18 +74,18 @@ class Domain
     result = resolver.getresources(domain, Resolv::DNS::Resource::IN::TXT)
     records = result.map(&:data)
     if records.empty?
-      self.dkim_status = 'Missing'
+      self.dkim_status = "Missing"
       self.dkim_error = "No TXT records were returned for #{domain}"
     else
-      sanitised_dkim_record = records.first.strip.ends_with?(';') ? records.first.strip : "#{records.first.strip};"
+      sanitised_dkim_record = records.first.strip.ends_with?(";") ? records.first.strip : "#{records.first.strip};"
       if records.size > 1
-        self.dkim_status = 'Invalid'
+        self.dkim_status = "Invalid"
         self.dkim_error = "There are #{records.size} records for at #{domain}. There should only be one."
-      elsif sanitised_dkim_record != self.dkim_record
-        self.dkim_status = 'Invalid'
+      elsif sanitised_dkim_record != dkim_record
+        self.dkim_status = "Invalid"
         self.dkim_error = "The DKIM record at #{domain} does not match the record we have provided. Please check it has been copied correctly."
       else
-        self.dkim_status = 'OK'
+        self.dkim_status = "OK"
         self.dkim_error = nil
         true
       end
@@ -102,21 +102,21 @@ class Domain
   #
 
   def check_mx_records
-    result = resolver.getresources(self.name, Resolv::DNS::Resource::IN::MX)
+    result = resolver.getresources(name, Resolv::DNS::Resource::IN::MX)
     records = result.map(&:exchange)
     if records.empty?
-      self.mx_status = 'Missing'
-      self.mx_error = "There are no MX records for #{self.name}"
+      self.mx_status = "Missing"
+      self.mx_error = "There are no MX records for #{name}"
     else
       missing_records = Postal.config.dns.mx_records.dup - records.map { |r| r.to_s.downcase }
       if missing_records.empty?
-        self.mx_status = 'OK'
+        self.mx_status = "OK"
         self.mx_error = nil
       elsif missing_records.size == Postal.config.dns.mx_records.size
-        self.mx_status = 'Missing'
-        self.mx_error = 'You have MX records but none of them point to us.'
+        self.mx_status = "Missing"
+        self.mx_error = "You have MX records but none of them point to us."
       else
-        self.mx_status = 'Invalid'
+        self.mx_status = "Invalid"
         self.mx_error = "MX #{missing_records.size == 1 ? 'record' : 'records'} for #{missing_records.to_sentence} are missing and are required."
       end
     end
@@ -132,19 +132,17 @@ class Domain
   #
 
   def check_return_path_record
-    result = resolver.getresources(self.return_path_domain, Resolv::DNS::Resource::IN::CNAME)
+    result = resolver.getresources(return_path_domain, Resolv::DNS::Resource::IN::CNAME)
     records = result.map { |r| r.name.to_s.downcase }
     if records.empty?
-      self.return_path_status = 'Missing'
-      self.return_path_error = "There is no return path record at #{self.return_path_domain}"
-    else
-      if records.size == 1 && records.first == Postal.config.dns.return_path
-        self.return_path_status = 'OK'
+      self.return_path_status = "Missing"
+      self.return_path_error = "There is no return path record at #{return_path_domain}"
+    elsif records.size == 1 && records.first == Postal.config.dns.return_path
+      self.return_path_status = "OK"
       self.return_path_error = nil
     else
-        self.return_path_status = 'Invalid'
-        self.return_path_error = "There is a CNAME record at #{self.return_path_domain} but it points to #{records.first} which is incorrect. It should point to #{Postal.config.dns.return_path}."
-      end
+      self.return_path_status = "Invalid"
+      self.return_path_error = "There is a CNAME record at #{return_path_domain} but it points to #{records.first} which is incorrect. It should point to #{Postal.config.dns.return_path}."
     end
   end
 

app/models/domain/dns_verification.rb

@@ -1,4 +1,4 @@
-require 'resolv'
+require "resolv"
 
 class Domain
 
@@ -7,11 +7,12 @@ class Domain
   end
 
   def verify_with_dns
-    return false unless self.verification_method == 'DNS'
-    result = resolver.getresources(self.name, Resolv::DNS::Resource::IN::TXT)
-    if result.map { |d| d.data.to_s.strip}.include?(self.dns_verification_string)
+    return false unless verification_method == "DNS"
+
+    result = resolver.getresources(name, Resolv::DNS::Resource::IN::TXT)
+    if result.map { |d| d.data.to_s.strip }.include?(dns_verification_string)
       self.verified_at = Time.now
-      self.save
+      save
     else
       false
     end

app/models/http_endpoint.rb

@@ -26,19 +26,19 @@ class HTTPEndpoint < ApplicationRecord
   include HasUUID
 
   belongs_to :server
-  has_many :routes, :as => :endpoint
-  has_many :additional_route_endpoints, :dependent => :destroy, :as => :endpoint
+  has_many :routes, as: :endpoint
+  has_many :additional_route_endpoints, dependent: :destroy, as: :endpoint
 
-  ENCODINGS = ['BodyAsJSON', 'FormData']
-  FORMATS = ['Hash', 'RawMessage']
+  ENCODINGS = ["BodyAsJSON", "FormData"]
+  FORMATS = ["Hash", "RawMessage"]
 
   before_destroy :update_routes
 
-  validates :name, :presence => true
-  validates :url, :presence => true
-  validates :encoding, :inclusion => {:in => ENCODINGS}
-  validates :format, :inclusion => {:in => FORMATS}
-  validates :timeout, :numericality => {:greater_than_or_equal_to => 5, :less_than_or_equal_to => 60}
+  validates :name, presence: true
+  validates :url, presence: true
+  validates :encoding, inclusion: { in: ENCODINGS }
+  validates :format, inclusion: { in: FORMATS }
+  validates :timeout, numericality: { greater_than_or_equal_to: 5, less_than_or_equal_to: 60 }
 
   default_value :timeout, -> { DEFAULT_TIMEOUT }
 
@@ -51,7 +51,7 @@ class HTTPEndpoint < ApplicationRecord
   end
 
   def update_routes
-    self.routes.each { |r| r.update(:endpoint => nil, :mode => 'Reject') }
+    routes.each { |r| r.update(endpoint: nil, mode: "Reject") }
   end
 
 end

app/models/incoming_message_prototype.rb

@@ -18,27 +18,23 @@ class IncomingMessagePrototype
   end
 
   def from_address
-    @from.gsub(/.*</, '').gsub(/>.*/, '').strip
+    @from.gsub(/.*</, "").gsub(/>.*/, "").strip
   end
 
   def route
-    @routes ||= begin
-      if @to.present?
-        uname, domain = @to.split('@', 2)
-        uname, tag = uname.split('+', 2)
-        @server.routes.includes(:domain).where(:domains => {:name => domain}, :name => uname).first
-      else
-        nil
-      end
+    @routes ||= if @to.present?
+                  uname, domain = @to.split("@", 2)
+                  uname, tag = uname.split("+", 2)
+                  @server.routes.includes(:domain).where(domains: { name: domain }, name: uname).first
                 end
   end
 
   def attachments
     (@attachments || []).map do |attachment|
       {
-        :name => attachment[:name],
-        :content_type => attachment[:content_type] || 'application/octet-stream',
-        :data => attachment[:base64] ? Base64.decode64(attachment[:data]) : attachment[:data]
+        name: attachment[:name],
+        content_type: attachment[:content_type] || "application/octet-stream",
+        data: attachment[:base64] ? Base64.decode64(attachment[:data]) : attachment[:data]
       }
     end
   end
@@ -47,10 +43,10 @@ class IncomingMessagePrototype
     if valid?
       messages = route.create_messages do |message|
         message.rcpt_to = @to
-        message.mail_from = self.from_address
-        message.raw_message = self.raw_message
+        message.mail_from = from_address
+        message.raw_message = raw_message
       end
-      {route.description => {:id => messages.first.id, :token => messages.first.token}}
+      { route.description => { id: messages.first.id, token: messages.first.token } }
     else
       false
     end
@@ -66,7 +62,7 @@ class IncomingMessagePrototype
   end
 
   def validate
-    @errors = Array.new
+    @errors = []
     if route.nil?
       @errors << "NoRoutesFound"
     end
@@ -91,11 +87,11 @@ class IncomingMessagePrototype
       mail.message_id = "<#{SecureRandom.uuid}@#{Postal.config.dns.return_path}>"
       attachments.each do |attachment|
         mail.attachments[attachment[:name]] = {
-          :mime_type => attachment[:content_type],
-          :content => attachment[:data]
+          mime_type: attachment[:content_type],
+          content: attachment[:data]
         }
       end
-      mail.header['Received'] = "from #{@source_type} (#{@ip} [#{@ip}]) by Postal with HTTP; #{Time.now.utc.rfc2822.to_s}"
+      mail.header["Received"] = "from #{@source_type} (#{@ip} [#{@ip}]) by Postal with HTTP; #{Time.now.utc.rfc2822}"
       mail.to_s
     end
   end

app/models/ip_address.rb

@@ -16,9 +16,9 @@ class IPAddress < ApplicationRecord
 
   belongs_to :ip_pool
 
-  validates :ipv4, :presence => true, :uniqueness => true
-  validates :hostname, :presence => true
-  validates :ipv6, :uniqueness => {:allow_blank => true}
+  validates :ipv4, presence: true, uniqueness: true
+  validates :hostname, presence: true
+  validates :ipv6, uniqueness: { allow_blank: true }
   validates :priority, numericality: { greater_than_or_equal_to: 0, less_than_or_equal_to: 100, only_integer: true }
 
   scope :order_by_priority, -> { order(priority: :desc) }

app/models/ip_pool.rb

@@ -18,16 +18,16 @@ class IPPool < ApplicationRecord
 
   include HasUUID
 
-  validates :name, :presence => true
+  validates :name, presence: true
 
-  has_many :ip_addresses, :dependent => :restrict_with_exception
-  has_many :servers, :dependent => :restrict_with_exception
-  has_many :organization_ip_pools, :dependent => :destroy
-  has_many :organizations, :through => :organization_ip_pools
-  has_many :ip_pool_rules, :dependent => :destroy
+  has_many :ip_addresses, dependent: :restrict_with_exception
+  has_many :servers, dependent: :restrict_with_exception
+  has_many :organization_ip_pools, dependent: :destroy
+  has_many :organizations, through: :organization_ip_pools
+  has_many :ip_pool_rules, dependent: :destroy
 
   def self.default
-    where(:default => true).order(:id).first
+    where(default: true).order(:id).first
   end
 
 end

app/models/ip_pool_rule.rb

@@ -17,24 +17,24 @@ class IPPoolRule < ApplicationRecord
 
   include HasUUID
 
-  belongs_to :owner, :polymorphic => true
+  belongs_to :owner, polymorphic: true
   belongs_to :ip_pool
 
   validate :validate_from_and_to_addresses
   validate :validate_ip_pool_belongs_to_organization
 
   def from
-    from_text ? from_text.gsub(/\r/, '').split(/\n/).map(&:strip) : []
+    from_text ? from_text.gsub(/\r/, "").split(/\n/).map(&:strip) : []
   end
 
   def to
-    to_text ? to_text.gsub(/\r/, '').split(/\n/).map(&:strip) : []
+    to_text ? to_text.gsub(/\r/, "").split(/\n/).map(&:strip) : []
   end
 
   def apply_to_message?(message)
-    if from.present? && message.headers['from'].present?
+    if from.present? && message.headers["from"].present?
       from.each do |condition|
-        if message.headers['from'].any? { |f| self.class.address_matches?(condition, f) }
+        if message.headers["from"].any? { |f| self.class.address_matches?(condition, f) }
           return true
         end
       end
@@ -54,28 +54,29 @@ class IPPoolRule < ApplicationRecord
   private
 
   def validate_from_and_to_addresses
-    if self.from.empty? && self.to.empty?
+    return unless from.empty? && to.empty?
+
     errors.add :base, "At least one rule condition must be specified"
   end
-  end
 
   def validate_ip_pool_belongs_to_organization
-    org = self.owner.is_a?(Organization) ? self.owner : self.owner.organization
-    if self.ip_pool && self.ip_pool_id_changed? && !org.ip_pools.include?(self.ip_pool)
+    org = owner.is_a?(Organization) ? owner : owner.organization
+    return unless ip_pool && ip_pool_id_changed? && !org.ip_pools.include?(ip_pool)
+
     errors.add :ip_pool_id, "must belong to the organization"
   end
-  end
 
   def self.address_matches?(condition, address)
     address = Postal::Helpers.strip_name_from_address(address)
     if condition =~ /@/
-      parts = address.split('@')
-      domain, uname = parts.pop, parts.join('@')
-      uname, _ = uname.split('+', 2)
+      parts = address.split("@")
+      domain = parts.pop
+      uname = parts.join("@")
+      uname, = uname.split("+", 2)
       condition == "#{uname}@#{domain}"
     else
       # Match as a domain
-      condition == address.split('@').last
+      condition == address.split("@").last
     end
   end
 

app/models/organization.rb

@@ -23,41 +23,41 @@
 
 class Organization < ApplicationRecord
 
-  RESERVED_PERMALINKS = ['new', 'edit', 'remove', 'delete', 'destroy', 'admin', 'mail', 'org', 'server']
+  RESERVED_PERMALINKS = ["new", "edit", "remove", "delete", "destroy", "admin", "mail", "org", "server"]
 
   INITIAL_QUOTA = 10
-  INITIAL_SUPER_QUOTA = 10000
+  INITIAL_SUPER_QUOTA = 10_000
   include HasUUID
   include HasSoftDestroy
 
-  validates :name, :presence => true
-  validates :permalink, :presence => true, :format => {:with => /\A[a-z0-9\-]*\z/}, :uniqueness => true, :exclusion => {:in => RESERVED_PERMALINKS}
-  validates :time_zone, :presence => true
+  validates :name, presence: true
+  validates :permalink, presence: true, format: { with: /\A[a-z0-9-]*\z/ }, uniqueness: true, exclusion: { in: RESERVED_PERMALINKS }
+  validates :time_zone, presence: true
 
-  default_value :time_zone, -> { 'UTC' }
-  default_value :permalink, -> { Organization.find_unique_permalink(self.name) if self.name }
+  default_value :time_zone, -> { "UTC" }
+  default_value :permalink, -> { Organization.find_unique_permalink(name) if name }
 
-  belongs_to :owner, :class_name => 'User'
-  has_many :organization_users, :dependent => :destroy
-  has_many :users, :through => :organization_users, :source_type => 'User'
-  has_many :user_invites, :through => :organization_users, :source_type => 'UserInvite', :source => :user
-  has_many :servers, :dependent => :destroy
-  has_many :domains, :as => :owner, :dependent => :destroy
-  has_many :organization_ip_pools, :dependent => :destroy
-  has_many :ip_pools, :through => :organization_ip_pools
-  has_many :ip_pool_rules, :dependent => :destroy, :as => :owner
+  belongs_to :owner, class_name: "User"
+  has_many :organization_users, dependent: :destroy
+  has_many :users, through: :organization_users, source_type: "User"
+  has_many :user_invites, through: :organization_users, source_type: "UserInvite", source: :user
+  has_many :servers, dependent: :destroy
+  has_many :domains, as: :owner, dependent: :destroy
+  has_many :organization_ip_pools, dependent: :destroy
+  has_many :ip_pools, through: :organization_ip_pools
+  has_many :ip_pool_rules, dependent: :destroy, as: :owner
 
   after_create do
     if pool = IPPool.default
-      self.ip_pools << IPPool.default
+      ip_pools << IPPool.default
     end
   end
 
   def status
-    if self.suspended?
-      'Suspended'
+    if suspended?
+      "Suspended"
     else
-      'Active'
+      "Active"
     end
   end
 
@@ -71,25 +71,25 @@ class Organization < ApplicationRecord
 
   def user_assignment(user)
     @user_assignments ||= {}
-    @user_assignments[user.id] ||= organization_users.where(:user => user).first
+    @user_assignments[user.id] ||= organization_users.where(user: user).first
   end
 
   def make_owner(new_owner)
-    user_assignment(new_owner).update(:admin => true, :all_servers => true)
-    update(:owner => new_owner)
+    user_assignment(new_owner).update(admin: true, all_servers: true)
+    update(owner: new_owner)
   end
 
   # This is an array of addresses that should receive notifications for this organization
   def notification_addresses
-    self.users.map(&:email_tag)
+    users.map(&:email_tag)
   end
 
   def self.find_unique_permalink(name)
     loop.each_with_index do |_, i|
-      i = i + 1
+      i += 1
       proposal = name.parameterize
       proposal += "-#{i}" if i > 1
-      unless self.where(:permalink => proposal).exists?
+      unless where(permalink: proposal).exists?
         return proposal
       end
     end
@@ -97,9 +97,9 @@ class Organization < ApplicationRecord
 
   def self.[](id)
     if id.is_a?(String)
-      where(:permalink => id).first
+      where(permalink: id).first
     else
-      where(:id => id.to_i).first
+      where(id: id.to_i).first
     end
   end
 

app/models/organization_ip_pool.rb

@@ -10,6 +10,8 @@
 #
 
 class OrganizationIPPool < ApplicationRecord
+
   belongs_to :organization
   belongs_to :ip_pool
+
 end

app/models/organization_user.rb

@@ -14,6 +14,6 @@
 class OrganizationUser < ApplicationRecord
 
   belongs_to :organization
-  belongs_to :user, :polymorphic => true, :optional => true
+  belongs_to :user, polymorphic: true, optional: true
 
 end

app/models/outgoing_message_prototype.rb

@@ -1,4 +1,4 @@
-require 'resolv'
+require "resolv"
 
 class OutgoingMessagePrototype
 
@@ -29,9 +29,7 @@ class OutgoingMessagePrototype
     end
   end
 
-  def message_id
-    @message_id
-  end
+  attr_reader :message_id
 
   def from_address
     Postal::Helpers.strip_name_from_address(@from)
@@ -59,15 +57,15 @@ class OutgoingMessagePrototype
   end
 
   def to_addresses
-    @to.is_a?(String) ? @to.to_s.split(/\,\s*/) : @to.to_a
+    @to.is_a?(String) ? @to.to_s.split(/,\s*/) : @to.to_a
   end
 
   def cc_addresses
-    @cc.is_a?(String) ? @cc.to_s.split(/\,\s*/) : @cc.to_a
+    @cc.is_a?(String) ? @cc.to_s.split(/,\s*/) : @cc.to_a
   end
 
   def bcc_addresses
-    @bcc.is_a?(String) ? @bcc.to_s.split(/\,\s*/) : @bcc.to_a
+    @bcc.is_a?(String) ? @bcc.to_s.split(/,\s*/) : @bcc.to_a
   end
 
   def all_addresses
@@ -98,30 +96,30 @@ class OutgoingMessagePrototype
   def attachments
     (@attachments || []).map do |attachment|
       {
-        :name => attachment[:name],
-        :content_type => attachment[:content_type] || 'application/octet-stream',
-        :data => attachment[:base64] ? Base64.decode64(attachment[:data]) : attachment[:data]
+        name: attachment[:name],
+        content_type: attachment[:content_type] || "application/octet-stream",
+        data: attachment[:base64] ? Base64.decode64(attachment[:data]) : attachment[:data]
       }
     end
   end
 
   def validate
-    @errors = Array.new
+    @errors = []
 
     if to_addresses.empty? && cc_addresses.empty? && bcc_addresses.empty?
       @errors << "NoRecipients"
     end
 
     if to_addresses.size > 50
-      @errors << 'TooManyToAddresses'
+      @errors << "TooManyToAddresses"
     end
 
     if cc_addresses.size > 50
-      @errors << 'TooManyCCAddresses'
+      @errors << "TooManyCCAddresses"
     end
 
     if bcc_addresses.size > 50
-      @errors << 'TooManyBCCAddresses'
+      @errors << "TooManyBCCAddresses"
     end
 
     if @plain_body.blank? && @html_body.blank?
@@ -136,7 +134,7 @@ class OutgoingMessagePrototype
       @errors << "UnauthenticatedFromAddress"
     end
 
-    if attachments && !attachments.empty?
+    if attachments.present?
       attachments.each_with_index do |attachment, index|
         if attachment[:name].blank?
           @errors << "AttachmentMissingName" unless @errors.include?("AttachmentMissingName")
@@ -154,18 +152,18 @@ class OutgoingMessagePrototype
       if @custom_headers.is_a?(Hash)
         @custom_headers.each { |key, value| mail[key.to_s] = value.to_s }
       end
-      mail.to = self.to_addresses.join(', ') if self.to_addresses.present?
-      mail.cc = self.cc_addresses.join(', ') if self.cc_addresses.present?
+      mail.to = to_addresses.join(", ") if to_addresses.present?
+      mail.cc = cc_addresses.join(", ") if cc_addresses.present?
       mail.from = @from
       mail.sender = @sender
       mail.subject = @subject
       mail.reply_to = @reply_to
-      mail.part :content_type => "multipart/alternative" do |p|
-        if !@plain_body.blank?
+      mail.part content_type: "multipart/alternative" do |p|
+        if @plain_body.present?
           p.text_part = Mail::Part.new
           p.text_part.body = @plain_body
         end
-        if !@html_body.blank?
+        if @html_body.present?
           p.html_part = Mail::Part.new
           p.html_part.content_type = "text/html; charset=UTF-8"
           p.html_part.body = @html_body
@@ -173,11 +171,11 @@ class OutgoingMessagePrototype
       end
       attachments.each do |attachment|
         mail.attachments[attachment[:name]] = {
-          :mime_type => attachment[:content_type],
-          :content => attachment[:data]
+          mime_type: attachment[:content_type],
+          content: attachment[:data]
         }
       end
-      mail.header['Received'] = "from #{@source_type} (#{self.resolved_hostname} [#{@ip}]) by Postal with HTTP; #{Time.now.utc.rfc2822.to_s}"
+      mail.header["Received"] = "from #{@source_type} (#{resolved_hostname} [#{@ip}]) by Postal with HTTP; #{Time.now.utc.rfc2822}"
       mail.message_id = "<#{@message_id}>"
       mail.to_s
     end
@@ -185,21 +183,25 @@ class OutgoingMessagePrototype
 
   def create_message(address)
     message = @server.message_db.new_message
-    message.scope = 'outgoing'
+    message.scope = "outgoing"
     message.rcpt_to = address
-    message.mail_from = self.from_address
-    message.domain_id = self.domain.id
-    message.raw_message = self.raw_message
-    message.tag = self.tag
-    message.credential_id = self.credential&.id
+    message.mail_from = from_address
+    message.domain_id = domain.id
+    message.raw_message = raw_message
+    message.tag = tag
+    message.credential_id = credential&.id
     message.received_with_ssl = true
     message.bounce = @bounce ? 1 : 0
     message.save
-    {:id => message.id, :token => message.token}
+    { id: message.id, token: message.token }
   end
 
   def resolved_hostname
-    @resolved_hostname ||= Resolv.new.getname(@ip) rescue @ip
+    @resolved_hostname ||= begin
+      Resolv.new.getname(@ip)
+    rescue StandardError
+      @ip
+    end
   end
 
 end

app/models/queued_message.rb

@@ -29,21 +29,21 @@ class QueuedMessage < ApplicationRecord
   include HasMessage
 
   belongs_to :server
-  belongs_to :ip_address, :optional => true
-  belongs_to :user, :optional => true
+  belongs_to :ip_address, optional: true
+  belongs_to :user, optional: true
 
   before_create :allocate_ip_address
-  after_commit :queue, :on => :create
+  after_commit :queue, on: :create
 
-  scope :unlocked, -> { where(:locked_at => nil) }
+  scope :unlocked, -> { where(locked_at: nil) }
   scope :retriable, -> { where("retry_after IS NULL OR retry_after <= ?", 30.seconds.from_now) }
 
   def retriable?
-    self.retry_after.nil? || self.retry_after <= 30.seconds.from_now
+    retry_after.nil? || retry_after <= 30.seconds.from_now
   end
 
   def queue
-    UnqueueMessageJob.queue(queue_name, :id => self.id)
+    UnqueueMessageJob.queue(queue_name, id: id)
   end
 
   def queue!
@@ -56,21 +56,21 @@ class QueuedMessage < ApplicationRecord
   end
 
   def send_bounce
-    if self.message.send_bounces?
-      Postal::BounceMessage.new(self.server, self.message).queue
-    end
+    return unless message.send_bounces?
+
+    Postal::BounceMessage.new(server, message).queue
   end
 
   def allocate_ip_address
-    if Postal.ip_pools? && self.message && pool = self.server.ip_pool_for_message(self.message)
+    return unless Postal.ip_pools? && message && pool = server.ip_pool_for_message(message)
+
     self.ip_address = pool.ip_addresses.select_by_priority
   end
-  end
 
   def acquire_lock
     time = Time.now
     locker = Postal.locker_name
-    rows = self.class.where(:id => self.id, :locked_by => nil, :locked_at => nil).update_all(:locked_by => locker, :locked_at => time)
+    rows = self.class.where(id: id, locked_by: nil, locked_at: nil).update_all(locked_by: locker, locked_at: time)
     if rows == 1
       self.locked_by = locker
       self.locked_at = time
@@ -81,20 +81,20 @@ class QueuedMessage < ApplicationRecord
   end
 
   def retry_later(time = nil)
-    retry_time = time || self.class.calculate_retry_time(self.attempts, 5.minutes)
+    retry_time = time || self.class.calculate_retry_time(attempts, 5.minutes)
     self.locked_by = nil
     self.locked_at = nil
-    update_columns(:locked_by => nil, :locked_at => nil, :retry_after => Time.now + retry_time, :attempts => self.attempts + 1)
+    update_columns(locked_by: nil, locked_at: nil, retry_after: Time.now + retry_time, attempts: attempts + 1)
   end
 
   def unlock
     self.locked_by = nil
     self.locked_at = nil
-    update_columns(:locked_by => nil, :locked_at => nil)
+    update_columns(locked_by: nil, locked_at: nil)
   end
 
   def self.calculate_retry_time(attempts, initial_period)
-    (1.3 ** attempts) * initial_period
+    (1.3**attempts) * initial_period
   end
 
   def locked?
@@ -105,13 +105,14 @@ class QueuedMessage < ApplicationRecord
     unless locked?
       raise Postal::Error, "Must lock current message before locking any friends"
     end
-    if self.batch_key.nil?
+
+    if batch_key.nil?
       []
     else
       time = Time.now
       locker = Postal.locker_name
-      self.class.retriable.where(:batch_key => self.batch_key, :ip_address_id => self.ip_address_id, :locked_by => nil, :locked_at => nil).limit(limit).update_all(:locked_by => locker, :locked_at => time)
-      QueuedMessage.where(:batch_key => self.batch_key, :ip_address_id => self.ip_address_id, :locked_by => locker, :locked_at => time).where.not(id: self.id)
+      self.class.retriable.where(batch_key: batch_key, ip_address_id: ip_address_id, locked_by: nil, locked_at: nil).limit(limit).update_all(locked_by: locker, locked_at: time)
+      QueuedMessage.where(batch_key: batch_key, ip_address_id: ip_address_id, locked_by: locker, locked_at: time).where.not(id: id)
     end
   end
 

app/models/route.rb

@@ -22,22 +22,22 @@
 
 class Route < ApplicationRecord
 
-  MODES = ['Endpoint', 'Accept', 'Hold', 'Bounce', 'Reject']
+  MODES = ["Endpoint", "Accept", "Hold", "Bounce", "Reject"]
 
   include HasUUID
 
   belongs_to :server
-  belongs_to :domain, :optional => true
-  belongs_to :endpoint, :polymorphic => true, :optional => true
-  has_many :additional_route_endpoints, :dependent => :destroy
+  belongs_to :domain, optional: true
+  belongs_to :endpoint, polymorphic: true, optional: true
+  has_many :additional_route_endpoints, dependent: :destroy
 
-  SPAM_MODES = ['Mark', 'Quarantine', 'Fail']
-  ENDPOINT_TYPES = ['SMTPEndpoint', 'HTTPEndpoint', 'AddressEndpoint']
+  SPAM_MODES = ["Mark", "Quarantine", "Fail"]
+  ENDPOINT_TYPES = ["SMTPEndpoint", "HTTPEndpoint", "AddressEndpoint"]
 
-  validates :name, :presence => true, :format => /\A(([a-z0-9\-\.]*)|(\*)|(__returnpath__))\z/
-  validates :spam_mode, :inclusion => {:in => SPAM_MODES}
-  validates :endpoint, :presence => {:if => proc { self.mode == 'Endpoint' }}
-  validates :domain_id, :presence => {:unless => :return_path?}
+  validates :name, presence: true, format: /\A(([a-z0-9\-.]*)|(\*)|(__returnpath__))\z/
+  validates :spam_mode, inclusion: { in: SPAM_MODES }
+  validates :endpoint, presence: { if: proc { mode == "Endpoint" } }
+  validates :domain_id, presence: { unless: :return_path? }
   validate :validate_route_is_routed
   validate :validate_domain_belongs_to_server
   validate :validate_endpoint_belongs_to_server
@@ -47,7 +47,7 @@ class Route < ApplicationRecord
 
   after_save :save_additional_route_endpoints
 
-  random_string :token, :type => :chars, :length => 8, :unique => true
+  random_string :token, type: :chars, length: 8, unique: true
 
   def return_path?
     name == "__returnpath__"
@@ -62,12 +62,10 @@ class Route < ApplicationRecord
   end
 
   def _endpoint
-    @endpoint ||= begin
-      if self.mode == 'Endpoint'
-        endpoint ? "#{endpoint.class}##{endpoint.uuid}" : nil
+    if mode == "Endpoint"
+      @endpoint ||= endpoint ? "#{endpoint.class}##{endpoint.uuid}" : nil
     else
-        self.mode
-      end
+      @endpoint ||= mode
     end
   end
 
@@ -75,27 +73,26 @@ class Route < ApplicationRecord
     if value.blank?
       self.endpoint = nil
       self.mode = nil
-    else
-      if value =~ /\#/
-        class_name, id = value.split('#', 2)
+    elsif value =~ /\#/
+      class_name, id = value.split("#", 2)
       unless ENDPOINT_TYPES.include?(class_name)
         raise Postal::Error, "Invalid endpoint class name '#{class_name}'"
       end
+
       self.endpoint = class_name.constantize.find_by_uuid(id)
-        self.mode = 'Endpoint'
+      self.mode = "Endpoint"
     else
       self.endpoint = nil
       self.mode = value
     end
   end
-  end
 
   def forward_address
     @forward_address ||= "#{token}@#{Postal.config.dns.route_domain}"
   end
 
   def wildcard?
-    self.name == '*'
+    name == "*"
   end
 
   def additional_route_endpoints_array
@@ -107,13 +104,14 @@ class Route < ApplicationRecord
   end
 
   def save_additional_route_endpoints
-    if @additional_route_endpoints_array
+    return unless @additional_route_endpoints_array
+
     seen = []
     @additional_route_endpoints_array.each do |item|
       if existing = additional_route_endpoints.find_by_endpoint(item)
         seen << existing.id
       else
-          route = additional_route_endpoints.build(:_endpoint => item)
+        route = additional_route_endpoints.build(_endpoint: item)
         if route.save
           seen << route.id
         else
@@ -124,33 +122,33 @@ class Route < ApplicationRecord
         end
       end
     end
-      additional_route_endpoints.where.not(:id => seen).destroy_all
-    end
+    additional_route_endpoints.where.not(id: seen).destroy_all
   end
 
   #
   # This message will create a suitable number of message objects for messages that
-  # are destined for this route. It receives a block which can set the message content
+  #  are destined for this route. It receives a block which can set the message content
   # but most information is specified already.
   #
   # Returns an array of created messages.
   #
   def create_messages(&block)
     messages = []
-    message = self.build_message
-    if self.mode == 'Endpoint' && self.server.message_db.schema_version >= 18
-      message.endpoint_type = self.endpoint_type
-      message.endpoint_id = self.endpoint_id
+    message = build_message
+    if mode == "Endpoint" && server.message_db.schema_version >= 18
+      message.endpoint_type = endpoint_type
+      message.endpoint_id = endpoint_id
     end
     block.call(message)
     message.save
     messages << message
 
     # Also create any messages for additional endpoints that might exist
-    if self.mode == 'Endpoint' && self.server.message_db.schema_version >= 18
-      self.additional_route_endpoints.each do |endpoint|
+    if mode == "Endpoint" && server.message_db.schema_version >= 18
+      additional_route_endpoints.each do |endpoint|
         next unless endpoint.endpoint
-        message = self.build_message
+
+        message = build_message
         message.endpoint_id = endpoint.endpoint_id
         message.endpoint_type = endpoint.endpoint_type
         block.call(message)
@@ -163,69 +161,67 @@ class Route < ApplicationRecord
   end
 
   def build_message
-    message = self.server.message_db.new_message
-    message.scope = 'incoming'
-    message.rcpt_to = self.description
-    message.domain_id = self.domain&.id
-    message.route_id = self.id
+    message = server.message_db.new_message
+    message.scope = "incoming"
+    message.rcpt_to = description
+    message.domain_id = domain&.id
+    message.route_id = id
     message
   end
 
   private
 
   def validate_route_is_routed
-    if self.mode.nil?
+    return unless mode.nil?
+
     errors.add :endpoint, "must be chosen"
   end
-  end
 
   def validate_domain_belongs_to_server
-    if self.domain && ![self.server, self.server.organization].include?(self.domain.owner)
+    if domain && ![server, server.organization].include?(domain.owner)
       errors.add :domain, :invalid
     end
 
-    if self.domain && !self.domain.verified?
+    return unless domain && !domain.verified?
+
     errors.add :domain, "has not been verified yet"
   end
-  end
 
   def validate_endpoint_belongs_to_server
-    if self.endpoint && self.endpoint&.server != self.server
+    return unless endpoint && endpoint&.server != server
+
     errors.add :endpoint, :invalid
   end
-  end
 
   def validate_name_uniqueness
-    return if self.server.nil?
-    if self.domain
-      if route = Route.includes(:domain).where(:domains => {:name => self.domain.name}, :name => self.name).where.not(:id => self.id).first
+    return if server.nil?
+
+    if domain
+      if route = Route.includes(:domain).where(domains: { name: domain.name }, name: name).where.not(id: id).first
         errors.add :name, "is configured on the #{route.server.full_permalink} mail server"
       end
-    else
-      if route = Route.where(:name => "__returnpath__").where.not(:id => self.id).exists?
+    elsif route = Route.where(name: "__returnpath__").where.not(id: id).exists?
       errors.add :base, "A return path route already exists for this server"
     end
   end
-  end
 
   def validate_return_path_route_endpoints
-    if return_path?
-      if self.mode != 'Endpoint' || self.endpoint_type != 'HTTPEndpoint'
+    return unless return_path?
+    return unless mode != "Endpoint" || endpoint_type != "HTTPEndpoint"
+
     errors.add :base, "Return path routes must point to an HTTP endpoint"
   end
-    end
-  end
 
   def validate_no_additional_routes_on_non_endpoint_route
-    if self.mode != 'Endpoint' && !self.additional_route_endpoints_array.empty?
+    return unless mode != "Endpoint" && !additional_route_endpoints_array.empty?
+
     errors.add :base, "Additional routes are not permitted unless the primary route is an actual endpoint"
   end
-  end
 
   def self.find_by_name_and_domain(name, domain)
-    route = Route.includes(:domain).where(:name => name, :domains => {:name => domain}).first
+    route = Route.includes(:domain).where(name: name, domains: { name: domain }).first
     if route.nil?
-      route = Route.includes(:domain).where(:name => '*', :domains => {:name => domain}).first
+      route = Route.includes(:domain).where(name: "*", domains: { name: domain }).first
     end
     route
   end

app/models/server.rb

@@ -41,7 +41,7 @@
 
 class Server < ApplicationRecord
 
-  RESERVED_PERMALINKS = ['new', 'all', 'search', 'stats', 'edit', 'manage', 'delete', 'destroy', 'remove']
+  RESERVED_PERMALINKS = ["new", "all", "search", "stats", "edit", "manage", "delete", "destroy", "remove"]
 
   include HasUUID
   include HasSoftDestroy
@@ -49,55 +49,55 @@ class Server < ApplicationRecord
   attr_accessor :provision_database
 
   belongs_to :organization
-  belongs_to :ip_pool, :optional => true
-  has_many :domains, :dependent => :destroy, :as => :owner
-  has_many :credentials, :dependent => :destroy
-  has_many :smtp_endpoints, :dependent => :destroy
-  has_many :http_endpoints, :dependent => :destroy
-  has_many :address_endpoints, :dependent => :destroy
-  has_many :routes, :dependent => :destroy
-  has_many :queued_messages, :dependent => :delete_all
-  has_many :webhooks, :dependent => :destroy
-  has_many :webhook_requests, :dependent => :destroy
-  has_many :track_domains, :dependent => :destroy
-  has_many :ip_pool_rules, :dependent => :destroy, :as => :owner
+  belongs_to :ip_pool, optional: true
+  has_many :domains, dependent: :destroy, as: :owner
+  has_many :credentials, dependent: :destroy
+  has_many :smtp_endpoints, dependent: :destroy
+  has_many :http_endpoints, dependent: :destroy
+  has_many :address_endpoints, dependent: :destroy
+  has_many :routes, dependent: :destroy
+  has_many :queued_messages, dependent: :delete_all
+  has_many :webhooks, dependent: :destroy
+  has_many :webhook_requests, dependent: :destroy
+  has_many :track_domains, dependent: :destroy
+  has_many :ip_pool_rules, dependent: :destroy, as: :owner
 
-  MODES = ['Live', 'Development']
+  MODES = ["Live", "Development"]
 
-  random_string :token, :type => :chars, :length => 6, :unique => true, :upper_letters_only => true
-  default_value :permalink, -> { name ? name.parameterize : nil}
+  random_string :token, type: :chars, length: 6, unique: true, upper_letters_only: true
+  default_value :permalink, -> { name ? name.parameterize : nil }
   default_value :raw_message_retention_days, -> { 30 }
   default_value :raw_message_retention_size, -> { 2048 }
   default_value :message_retention_days, -> { 60 }
   default_value :spam_threshold, -> { Postal.config.general.default_spam_threshold }
   default_value :spam_failure_threshold, -> { Postal.config.general.default_spam_failure_threshold }
 
-  validates :name, :presence => true, :uniqueness => {:scope => :organization_id}
-  validates :mode, :inclusion => {:in => MODES}
-  validates :permalink, :presence => true, :uniqueness => {:scope => :organization_id}, :format => {:with => /\A[a-z0-9\-]*\z/}, :exclusion => {:in => RESERVED_PERMALINKS}
+  validates :name, presence: true, uniqueness: { scope: :organization_id }
+  validates :mode, inclusion: { in: MODES }
+  validates :permalink, presence: true, uniqueness: { scope: :organization_id }, format: { with: /\A[a-z0-9-]*\z/ }, exclusion: { in: RESERVED_PERMALINKS }
   validate :validate_ip_pool_belongs_to_organization
 
-  before_validation(:on => :create) do
-    self.token = self.token.downcase if self.token
+  before_validation(on: :create) do
+    self.token = token.downcase if token
   end
 
   after_create do
-    unless self.provision_database == false
+    unless provision_database == false
       message_db.provisioner.provision
     end
   end
 
-  after_commit(:on => :destroy) do
-    unless self.provision_database == false
+  after_commit(on: :destroy) do
+    unless provision_database == false
       message_db.provisioner.drop
     end
   end
 
   def status
-    if self.suspended?
-      'Suspended'
+    if suspended?
+      "Suspended"
     else
-      self.mode
+      mode
     end
   end
 
@@ -110,12 +110,12 @@ class Server < ApplicationRecord
   end
 
   def actual_suspension_reason
-    if suspended?
+    return unless suspended?
+
     if suspended_at.nil?
       organization.suspension_reason
     else
-        self.suspension_reason
-      end
+      suspension_reason
     end
   end
 
@@ -124,30 +124,28 @@ class Server < ApplicationRecord
   end
 
   def message_db
-    @message_db ||= Postal::MessageDB::Database.new(self.organization_id, self.id)
+    @message_db ||= Postal::MessageDB::Database.new(organization_id, id)
   end
 
-  def message(id)
-    message_db.message(id)
-  end
+  delegate :message, to: :message_db
 
   def message_rate
-    @message_rate ||= message_db.live_stats.total(60, :types => [:incoming, :outgoing]) / 60.0
+    @message_rate ||= message_db.live_stats.total(60, types: [:incoming, :outgoing]) / 60.0
   end
 
   def held_messages
-    @held_messages ||= message_db.messages(:where => {:held => 1}, :count => true)
+    @held_messages ||= message_db.messages(where: { held: 1 }, count: true)
   end
 
   def throughput_stats
     @throughput_stats ||= begin
-      incoming = message_db.live_stats.total(60, :types => [:incoming])
-      outgoing = message_db.live_stats.total(60, :types => [:outgoing])
+      incoming = message_db.live_stats.total(60, types: [:incoming])
+      outgoing = message_db.live_stats.total(60, types: [:outgoing])
       outgoing_usage = send_limit ? (outgoing / send_limit.to_f) * 100 : 0
       {
-        :incoming => incoming,
-        :outgoing => outgoing,
-        :outgoing_usage => outgoing_usage
+        incoming: incoming,
+        outgoing: outgoing,
+        outgoing_usage: outgoing_usage
       }
     end
   end
@@ -166,8 +164,10 @@ class Server < ApplicationRecord
   end
 
   def domain_stats
-    domains = Domain.where(:owner_id => self.id, :owner_type => 'Server').to_a
-    total, unverified, bad_dns = 0, 0, 0
+    domains = Domain.where(owner_id: id, owner_type: "Server").to_a
+    total = 0
+    unverified = 0
+    bad_dns = 0
     domains.each do |domain|
       total += 1
       unverified += 1 unless domain.verified?
@@ -178,29 +178,29 @@ class Server < ApplicationRecord
 
   def webhook_hash
     {
-      :uuid => self.uuid,
-      :name => self.name,
-      :permalink => self.permalink,
-      :organization => self.organization&.permalink
+      uuid: uuid,
+      name: name,
+      permalink: permalink,
+      organization: organization&.permalink
     }
   end
 
   def send_volume
-    @send_volume ||= message_db.live_stats.total(60, :types => [:outgoing])
+    @send_volume ||= message_db.live_stats.total(60, types: [:outgoing])
   end
 
   def send_limit_approaching?
-    self.send_limit && (send_volume >= self.send_limit * 0.90)
+    send_limit && (send_volume >= send_limit * 0.90)
   end
 
   def send_limit_exceeded?
-    self.send_limit && send_volume >= self.send_limit
+    send_limit && send_volume >= send_limit
   end
 
   def send_limit_warning(type)
     AppMailer.send("server_send_limit_#{type}", self).deliver
-    self.update_column("send_limit_#{type}_notified_at", Time.now)
-    WebhookRequest.trigger(self, "SendLimit#{type.to_s.capitalize}", :server => webhook_hash, :volume => self.send_volume, :limit => self.send_limit)
+    update_column("send_limit_#{type}_notified_at", Time.now)
+    WebhookRequest.trigger(self, "SendLimit#{type.to_s.capitalize}", server: webhook_hash, volume: send_volume, limit: send_limit)
   end
 
   def queue_size
@@ -209,36 +209,38 @@ class Server < ApplicationRecord
 
   def stats
     {
-      :queue => queue_size,
-      :held => self.held_messages,
-      :bounce_rate => self.bounce_rate,
-      :message_rate => self.message_rate,
-      :throughput => self.throughput_stats,
-      :size => self.message_db.total_size
+      queue: queue_size,
+      held: held_messages,
+      bounce_rate: bounce_rate,
+      message_rate: message_rate,
+      throughput: throughput_stats,
+      size: message_db.total_size
     }
   end
 
   def authenticated_domain_for_address(address)
     return nil if address.blank?
+
     address = Postal::Helpers.strip_name_from_address(address)
-    uname, domain_name = address.split('@', 2)
+    uname, domain_name = address.split("@", 2)
     return nil unless uname
     return nil unless domain_name
-    uname, _ = uname.split('+', 2)
+
+    uname, = uname.split("+", 2)
 
     # Check the server's domain
-    if domain = Domain.verified.order(:owner_type => :desc).where("(owner_type = 'Organization' AND owner_id = ?) OR (owner_type = 'Server' AND owner_id = ?)", self.organization_id, self.id).where(:name => domain_name).first
+    if domain = Domain.verified.order(owner_type: :desc).where("(owner_type = 'Organization' AND owner_id = ?) OR (owner_type = 'Server' AND owner_id = ?)", organization_id, id).where(name: domain_name).first
       return domain
     end
 
-    if any_domain = self.domains.verified.where(:use_for_any => true).order(:name).first
-      return any_domain
-    end
+    return unless any_domain = domains.verified.where(use_for_any: true).order(:name).first
+
+    any_domain
   end
 
   def find_authenticated_domain_from_headers(headers)
-    header_to_check = ['from']
-    header_to_check << 'sender' if self.allow_sender?
+    header_to_check = ["from"]
+    header_to_check << "sender" if allow_sender?
     header_to_check.each do |header_name|
       if headers[header_name].is_a?(Array)
         values = headers[header_name]
@@ -257,36 +259,34 @@ class Server < ApplicationRecord
   def suspend(reason)
     self.suspended_at = Time.now
     self.suspension_reason = reason
-    self.save!
+    save!
     AppMailer.server_suspended(self).deliver
   end
 
   def unsuspend
     self.suspended_at = nil
     self.suspension_reason = nil
-    self.save!
+    save!
   end
 
   def validate_ip_pool_belongs_to_organization
-    if self.ip_pool && self.ip_pool_id_changed? && !self.organization.ip_pools.include?(self.ip_pool)
+    return unless ip_pool && ip_pool_id_changed? && !organization.ip_pools.include?(ip_pool)
+
     errors.add :ip_pool_id, "must belong to the organization"
   end
-  end
 
   def ip_pool_for_message(message)
-    if message.scope == 'outgoing'
-      [self, self.organization].each do |scope|
-        rules = scope.ip_pool_rules.order(:created_at => :desc)
+    return unless message.scope == "outgoing"
+
+    [self, organization].each do |scope|
+      rules = scope.ip_pool_rules.order(created_at: :desc)
       rules.each do |rule|
         if rule.apply_to_message?(message)
           return rule.ip_pool
         end
       end
     end
-      self.ip_pool
-    else
-      nil
-    end
+    ip_pool
   end
 
   def self.triggered_send_limit(type)
@@ -297,29 +297,29 @@ class Server < ApplicationRecord
   def self.send_send_limit_notifications
     [:approaching, :exceeded].each_with_object({}) do |type, hash|
       hash[type] = 0
-      servers = self.triggered_send_limit(type)
-      unless servers.empty?
+      servers = triggered_send_limit(type)
+      next if servers.empty?
+
       servers.each do |server|
         hash[type] += 1
         server.send_limit_warning(type)
       end
     end
   end
-  end
 
   def self.[](id, extra = nil)
     server = nil
     if id.is_a?(String)
       if id =~ /\A(\w+)\/(\w+)\z/
-        server = includes(:organization).where(:organizations => {:permalink => $1}, :permalink => $2).first
+        server = includes(:organization).where(organizations: { permalink: ::Regexp.last_match(1) }, permalink: ::Regexp.last_match(2)).first
       end
     else
-      server = where(:id => id).first
+      server = where(id: id).first
     end
 
     if extra
       if extra.is_a?(String)
-        server.domains.where(:name => extra.to_s).first
+        server.domains.where(name: extra.to_s).first
       else
         server.message(extra.to_i)
       end

app/models/smtp_endpoint.rb

@@ -21,17 +21,17 @@ class SMTPEndpoint < ApplicationRecord
   include HasUUID
 
   belongs_to :server
-  has_many :routes, :as => :endpoint
-  has_many :additional_route_endpoints, :dependent => :destroy, :as => :endpoint
+  has_many :routes, as: :endpoint
+  has_many :additional_route_endpoints, dependent: :destroy, as: :endpoint
 
-  SSL_MODES = ['None', 'Auto', 'STARTTLS', 'TLS']
+  SSL_MODES = ["None", "Auto", "STARTTLS", "TLS"]
 
   before_destroy :update_routes
 
-  validates :name, :presence => true
-  validates :hostname, :presence => true, :format => /\A[a-z0-9\.\-]*\z/
-  validates :ssl_mode, :inclusion => {:in => SSL_MODES}
-  validates :port, :numericality => {:only_integer => true, :allow_blank => true}
+  validates :name, presence: true
+  validates :hostname, presence: true, format: /\A[a-z0-9.-]*\z/
+  validates :ssl_mode, inclusion: { in: SSL_MODES }
+  validates :port, numericality: { only_integer: true, allow_blank: true }
 
   def description
     "#{name} (#{hostname})"
@@ -42,7 +42,7 @@ class SMTPEndpoint < ApplicationRecord
   end
 
   def update_routes
-    self.routes.each { |r| r.update(:endpoint => nil, :mode => 'Reject') }
+    routes.each { |r| r.update(endpoint: nil, mode: "Reject") }
   end
 
 end

app/models/track_domain.rb

@@ -18,7 +18,7 @@
 #  excluded_click_domains :text(65535)
 #
 
-require 'resolv'
+require "resolv"
 
 class TrackDomain < ApplicationRecord
 
@@ -27,16 +27,16 @@ class TrackDomain < ApplicationRecord
   belongs_to :server
   belongs_to :domain
 
-  validates :name, :presence => true, :format => {:with => /\A[a-z0-9\-]+\z/}, :uniqueness => {:scope => :domain_id, :message => "is already added"}
-  validates :domain_id, :uniqueness => {:scope => :server_id, :message => "already has a track domain for this server"}
+  validates :name, presence: true, format: { with: /\A[a-z0-9-]+\z/ }, uniqueness: { scope: :domain_id, message: "is already added" }
+  validates :domain_id, uniqueness: { scope: :server_id, message: "already has a track domain for this server" }
   validate :validate_domain_belongs_to_server
 
-  scope :ok, -> { where(:dns_status => 'OK')}
+  scope :ok, -> { where(dns_status: "OK") }
 
-  after_create :check_dns, :unless => :dns_status
+  after_create :check_dns, unless: :dns_status
 
   before_validation do
-    self.server = self.domain.server if self.domain && self.server.nil?
+    self.server = domain.server if domain && server.nil?
   end
 
   def full_name
@@ -48,26 +48,24 @@ class TrackDomain < ApplicationRecord
   end
 
   def dns_ok?
-    self.dns_status == 'OK'
+    dns_status == "OK"
   end
 
   def check_dns
-    result = self.domain.resolver.getresources(self.full_name, Resolv::DNS::Resource::IN::CNAME)
+    result = domain.resolver.getresources(full_name, Resolv::DNS::Resource::IN::CNAME)
     records = result.map { |r| r.name.to_s.downcase }
     if records.empty?
-      self.dns_status = 'Missing'
-      self.dns_error = "There is no record at #{self.full_name}"
-    else
-      if records.size == 1 && records.first == Postal.config.dns.track_domain
-        self.dns_status = 'OK'
+      self.dns_status = "Missing"
+      self.dns_error = "There is no record at #{full_name}"
+    elsif records.size == 1 && records.first == Postal.config.dns.track_domain
+      self.dns_status = "OK"
       self.dns_error = nil
     else
-        self.dns_status = 'Invalid'
-        self.dns_error = "There is a CNAME record at #{self.full_name} but it points to #{records.first} which is incorrect. It should point to #{Postal.config.dns.track_domain}."
-      end
+      self.dns_status = "Invalid"
+      self.dns_error = "There is a CNAME record at #{full_name} but it points to #{records.first} which is incorrect. It should point to #{Postal.config.dns.track_domain}."
     end
     self.dns_checked_at = Time.now
-    self.save!
+    save!
     dns_ok?
   end
 
@@ -76,9 +74,9 @@ class TrackDomain < ApplicationRecord
   end
 
   def validate_domain_belongs_to_server
-    if self.domain && ![self.server, self.server.organization].include?(self.domain.owner)
+    return unless domain && ![server, server.organization].include?(domain.owner)
+
     errors.add :domain, "does not belong to the server or the server's organization"
   end
-  end
 
 end

app/models/user.rb

@@ -27,25 +27,23 @@ class User < ApplicationRecord
 
   include HasUUID
 
-  require_dependency 'user/authentication'
+  require_dependency "user/authentication"
 
-  validates :first_name, :presence => true
-  validates :last_name, :presence => true
-  validates :email_address, :presence => true, :uniqueness => true, :format => {:with => /@/, allow_blank: true}
-  validates :time_zone, :presence => true
+  validates :first_name, presence: true
+  validates :last_name, presence: true
+  validates :email_address, presence: true, uniqueness: true, format: { with: /@/, allow_blank: true }
+  validates :time_zone, presence: true
 
-  default_value :time_zone, -> { 'UTC' }
+  default_value :time_zone, -> { "UTC" }
 
-  has_many :organization_users, :dependent => :destroy, :as => :user
-  has_many :organizations, :through => :organization_users
+  has_many :organization_users, dependent: :destroy, as: :user
+  has_many :organizations, through: :organization_users
 
   def organizations_scope
-    @organizations_scope ||= begin
-      if self.admin?
-        Organization.present
+    if admin?
+      @organizations_scope ||= Organization.present
     else
-        self.organizations.present
-      end
+      @organizations_scope ||= organizations.present
     end
   end
 
@@ -70,7 +68,7 @@ class User < ApplicationRecord
   end
 
   def self.[](email)
-    where(:email_address => email).first
+    where(email_address: email).first
   end
 
 end

app/models/user/authentication.rb

@@ -2,9 +2,9 @@ class User
 
   has_secure_password
 
-  validates :password, :length => {:minimum => 8, :allow_blank => true}
+  validates :password, length: { minimum: 8, allow_blank: true }
 
-  when_attribute :password_digest, :changes_to => :anything do
+  when_attribute :password_digest, changes_to: :anything do
     before_save do
       self.password_reset_token = nil
       self.password_reset_token_valid_until = nil
@@ -12,9 +12,10 @@ class User
   end
 
   def self.authenticate(email_address, password)
-    user = where(:email_address => email_address).first
-    raise Postal::Errors::AuthenticationError.new('InvalidEmailAddress') if user.nil?
-    raise Postal::Errors::AuthenticationError.new('InvalidPassword') unless user.authenticate(password)
+    user = where(email_address: email_address).first
+    raise Postal::Errors::AuthenticationError, "InvalidEmailAddress" if user.nil?
+    raise Postal::Errors::AuthenticationError, "InvalidPassword" unless user.authenticate(password)
+
     user
   end
 
@@ -27,9 +28,9 @@ class User
   end
 
   def begin_password_reset(return_to = nil)
-    self.password_reset_token = Nifty::Utils::RandomString.generate(:length => 24)
+    self.password_reset_token = Nifty::Utils::RandomString.generate(length: 24)
     self.password_reset_token_valid_until = 1.day.from_now
-    self.save!
+    save!
     AppMailer.password_reset(self, return_to).deliver
   end
 

app/models/user_invite.rb

@@ -18,10 +18,10 @@ class UserInvite < ApplicationRecord
 
   include HasUUID
 
-  validates :email_address, :presence => true, :uniqueness => true, :format => {:with => /@/, :allow_blank => true}
+  validates :email_address, presence: true, uniqueness: true, format: { with: /@/, allow_blank: true }
 
-  has_many :organization_users, :dependent => :destroy, :as => :user
-  has_many :organizations, :through => :organization_users
+  has_many :organization_users, dependent: :destroy, as: :user
+  has_many :organizations, through: :organization_users
 
   default_value :expires_at, -> { 7.days.from_now }
 
@@ -41,16 +41,16 @@ class UserInvite < ApplicationRecord
 
   def accept(user)
     transaction do
-      self.organization_users.each do |ou|
-        ou.update(:user => user) || ou.destroy
+      organization_users.each do |ou|
+        ou.update(user: user) || ou.destroy
       end
-      self.organization_users.reload
-      self.destroy
+      organization_users.reload
+      destroy
     end
   end
 
   def reject
-    self.destroy
+    destroy
   end
 
 end

app/models/webhook.rb

@@ -24,19 +24,19 @@ class Webhook < ApplicationRecord
   include HasUUID
 
   belongs_to :server
-  has_many :webhook_events, :dependent => :destroy
+  has_many :webhook_events, dependent: :destroy
   has_many :webhook_requests
 
-  validates :name, :presence => true
-  validates :url, :presence => true, :format => {:with => /\Ahttps?\:\/\/[a-z0-9\-\.\_\?\=\&\/\+:%@]+\z/i, :allow_blank => true}
+  validates :name, presence: true
+  validates :url, presence: true, format: { with: /\Ahttps?:\/\/[a-z0-9\-._?=&\/+:%@]+\z/i, allow_blank: true }
 
-  scope :enabled, -> { where(:enabled => true) }
+  scope :enabled, -> { where(enabled: true) }
 
   after_save :save_events
 
-  when_attribute :all_events, :changes_to => true do
+  when_attribute :all_events, changes_to: true do
     after_save do
-      self.webhook_events.destroy_all
+      webhook_events.destroy_all
     end
   end
 
@@ -49,12 +49,12 @@ class Webhook < ApplicationRecord
   end
 
   def save_events
-    if @events
+    return unless @events
+
     @events.each do |event|
-        webhook_events.where(:event => event).first_or_create!
-      end
-      webhook_events.where.not(:event => @events).destroy_all
+      webhook_events.where(event: event).first_or_create!
     end
+    webhook_events.where.not(event: @events).destroy_all
   end
 
 end

app/models/webhook_event.rb

@@ -15,18 +15,18 @@
 class WebhookEvent < ApplicationRecord
 
   EVENTS = [
-    'MessageSent',
-    'MessageDelayed',
-    'MessageDeliveryFailed',
-    'MessageHeld',
-    'MessageBounced',
-    'MessageLinkClicked',
-    'MessageLoaded',
-    'DomainDNSError'
+    "MessageSent",
+    "MessageDelayed",
+    "MessageDeliveryFailed",
+    "MessageHeld",
+    "MessageBounced",
+    "MessageLinkClicked",
+    "MessageLoaded",
+    "DomainDNSError"
   ]
 
   belongs_to :webhook
 
-  validates :event, :presence => true
+  validates :event, presence: true
 
 end

app/models/webhook_request.rb

@@ -19,17 +19,17 @@ class WebhookRequest < ApplicationRecord
 
   include HasUUID
 
-  RETRIES = {1 => 2.minutes, 2 => 3.minutes, 3 => 6.minutes, 4 => 10.minutes, 5 => 15.minutes}
+  RETRIES = { 1 => 2.minutes, 2 => 3.minutes, 3 => 6.minutes, 4 => 10.minutes, 5 => 15.minutes }
 
   belongs_to :server
-  belongs_to :webhook, :optional => true
+  belongs_to :webhook, optional: true
 
-  validates :url, :presence => true
-  validates :event, :presence => true
+  validates :url, presence: true
+  validates :event, presence: true
 
   serialize :payload, Hash
 
-  after_commit :queue, :on => :create
+  after_commit :queue, on: :create
 
   def self.trigger(server, event, payload = {})
     unless server.is_a?(Server)
@@ -38,52 +38,52 @@ class WebhookRequest < ApplicationRecord
 
     webhooks = server.webhooks.enabled.includes(:webhook_events).references(:webhook_events).where("webhooks.all_events = ? OR webhook_events.event = ?", true, event)
     webhooks.each do |webhook|
-      server.webhook_requests.create!(:event => event, :payload => payload, :webhook => webhook, :url => webhook.url)
+      server.webhook_requests.create!(event: event, payload: payload, webhook: webhook, url: webhook.url)
     end
   end
 
   def self.requeue_all
-    where("retry_after < ?", Time.now).each(&:queue)
+    where("retry_after < ?", Time.now).find_each(&:queue)
   end
 
   def queue
-    WebhookDeliveryJob.queue(:main, :id => self.id)
+    WebhookDeliveryJob.queue(:main, id: id)
   end
 
   def deliver
     logger = Postal.logger_for(:webhooks)
-    payload = {:event => self.event, :timestamp => self.created_at.to_f, :payload => self.payload, :uuid => self.uuid}.to_json
-    logger.info "[#{id}] Sending webhook request to `#{self.url}`"
-    result = Postal::HTTP.post(self.url, :sign => true, :json => payload, :timeout => 5)
+    payload = { event: event, timestamp: created_at.to_f, payload: self.payload, uuid: uuid }.to_json
+    logger.info "[#{id}] Sending webhook request to `#{url}`"
+    result = Postal::HTTP.post(url, sign: true, json: payload, timeout: 5)
     self.attempts += 1
     self.retry_after = RETRIES[self.attempts]&.from_now
-    self.server.message_db.webhooks.record(
-      :event => self.event,
-      :url => self.url,
-      :webhook_id => self.webhook_id,
-      :attempt => self.attempts,
-      :timestamp => Time.now.to_f,
-      :payload => self.payload.to_json,
-      :uuid => self.uuid,
-      :status_code => result[:code],
-      :body => result[:body],
-      :will_retry => (self.retry_after ? 0 : 1)
+    server.message_db.webhooks.record(
+      event: event,
+      url: url,
+      webhook_id: webhook_id,
+      attempt: self.attempts,
+      timestamp: Time.now.to_f,
+      payload: self.payload.to_json,
+      uuid: uuid,
+      status_code: result[:code],
+      body: result[:body],
+      will_retry: (retry_after ? 0 : 1)
     )
 
     if result[:code] >= 200 && result[:code] < 300
       logger.info "[#{id}]   -> Received #{result[:code]} status code. That's OK."
-      self.destroy
-      self.webhook&.update_column(:last_used_at, Time.now)
+      destroy
+      webhook&.update_column(:last_used_at, Time.now)
       true
     else
       logger.error "[#{id}]   -> Received #{result[:code]} status code. That's not OK."
       self.error = "Couldn't send to URL. Code received was #{result[:code]}"
-      if self.retry_after
-        logger.info "[#{id}]   -> Will retry #{self.retry_after} (this was attempt #{self.attempts})"
-        self.save
+      if retry_after
+        logger.info "[#{id}]   -> Will retry #{retry_after} (this was attempt #{self.attempts})"
+        save
       else
         logger.info "[#{id}]   -> Have tried #{self.attempts} times. Giving up."
-        self.destroy
+        destroy
       end
       false
     end

bin/bundle

@@ -1,3 +1,3 @@
 #!/usr/bin/env ruby
-ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile', __FILE__)
-load Gem.bin_path('bundler', 'bundle')
+ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../Gemfile", __dir__)
+load Gem.bin_path("bundler", "bundle")

bin/rails

@@ -1,4 +1,4 @@
 #!/usr/bin/env ruby
-APP_PATH = File.expand_path('../config/application', __dir__)
-require_relative '../config/boot'
-require 'rails/commands'
+APP_PATH = File.expand_path("../config/application", __dir__)
+require_relative "../config/boot"
+require "rails/commands"

bin/rake

@@ -1,4 +1,4 @@
 #!/usr/bin/env ruby
-require_relative '../config/boot'
-require 'rake'
+require_relative "../config/boot"
+require "rake"
 Rake.application.run

bin/setup

@@ -1,10 +1,10 @@
 #!/usr/bin/env ruby
-require 'pathname'
-require 'fileutils'
+require "pathname"
+require "fileutils"
 include FileUtils
 
 # path to your application root.
-APP_ROOT = Pathname.new File.expand_path('../../', __FILE__)
+APP_ROOT = Pathname.new File.expand_path("..", __dir__)
 
 def system!(*args)
   system(*args) || abort("\n== Command #{args} failed ==")
@@ -14,9 +14,9 @@ chdir APP_ROOT do
   # This script is a starting point to setup your application.
   # Add necessary setup steps to this file.
 
-  puts '== Installing dependencies =='
-  system! 'gem install bundler --conservative'
-  system('bundle check') || system!('bundle install')
+  puts "== Installing dependencies =="
+  system! "gem install bundler --conservative"
+  system("bundle check") || system!("bundle install")
 
   # puts "\n== Copying sample files =="
   # unless File.exist?('config/database.yml')
@@ -24,11 +24,11 @@ chdir APP_ROOT do
   # end
 
   puts "\n== Preparing database =="
-  system! 'bin/rails db:setup'
+  system! "bin/rails db:setup"
 
   puts "\n== Removing old logs and tempfiles =="
-  system! 'bin/rails log:clear tmp:clear'
+  system! "bin/rails log:clear tmp:clear"
 
   puts "\n== Restarting application server =="
-  system! 'bin/rails restart'
+  system! "bin/rails restart"
 end

bin/update

@@ -1,10 +1,10 @@
 #!/usr/bin/env ruby
-require 'pathname'
-require 'fileutils'
+require "pathname"
+require "fileutils"
 include FileUtils
 
 # path to your application root.
-APP_ROOT = Pathname.new File.expand_path('../../', __FILE__)
+APP_ROOT = Pathname.new File.expand_path("..", __dir__)
 
 def system!(*args)
   system(*args) || abort("\n== Command #{args} failed ==")
@@ -14,16 +14,16 @@ chdir APP_ROOT do
   # This script is a way to update your development environment automatically.
   # Add necessary update steps to this file.
 
-  puts '== Installing dependencies =='
-  system! 'gem install bundler --conservative'
-  system('bundle check') || system!('bundle install')
+  puts "== Installing dependencies =="
+  system! "gem install bundler --conservative"
+  system("bundle check") || system!("bundle install")
 
   puts "\n== Updating database =="
-  system! 'bin/rails db:migrate'
+  system! "bin/rails db:migrate"
 
   puts "\n== Removing old logs and tempfiles =="
-  system! 'bin/rails log:clear tmp:clear'
+  system! "bin/rails log:clear tmp:clear"
 
   puts "\n== Restarting application server =="
-  system! 'bin/rails restart'
+  system! "bin/rails restart"
 end

config.ru

@@ -1,5 +1,5 @@
 # This file is used by Rack-based servers to start the application.
 
-require_relative 'config/environment'
-$0="[postal] #{ENV['PROC_NAME']}"
+require_relative "config/environment"
+$0 = "[postal] #{ENV.fetch('PROC_NAME', nil)}"
 run Rails.application

config/application.rb

@@ -1,4 +1,4 @@
-require_relative 'boot'
+require_relative "boot"
 
 require "rails"
 require "active_model/railtie"
@@ -14,6 +14,7 @@ Bundler.require(*Rails.groups)
 
 module Postal
   class Application < Rails::Application
+
     # Disable most generators
     config.generators do |g|
       g.orm             :active_record
@@ -27,12 +28,13 @@ module Postal
     config.eager_load_namespaces << Postal
 
     # Disable field_with_errors
-    config.action_view.field_error_proc = Proc.new { |t, i| t }
+    config.action_view.field_error_proc = proc { |t, i| t }
 
     # Load the tracking server middleware
-    require 'postal/tracking_middleware'
+    require "postal/tracking_middleware"
     config.middleware.use Postal::TrackingMiddleware
 
     config.logger = Postal.logger_for(:rails)
+
   end
 end

config/boot.rb

@@ -1,11 +1,11 @@
-ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../Gemfile', __dir__)
+ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../Gemfile", __dir__)
 
 $stdout.sync = true
 $stderr.sync = true
 
-require 'bundler/setup' # Set up gems listed in the Gemfile.
+require "bundler/setup" # Set up gems listed in the Gemfile.
 
-require_relative '../lib/postal/config'
+require_relative "../lib/postal/config"
 Postal.check_config!
 
-ENV['RAILS_ENV'] = Postal.config.rails&.environment || 'development'
+ENV["RAILS_ENV"] = Postal.config.rails&.environment || "development"

config/cron.rb

@@ -1,26 +1,26 @@
 module Clockwork
 
   configure do |config|
-    config[:tz] = 'UTC'
+    config[:tz] = "UTC"
     config[:logger] = Postal.logger_for(:cron)
   end
 
-  every 1.minute, 'every-1-minutes' do
+  every 1.minute, "every-1-minutes" do
     RequeueWebhooksJob.queue(:main)
     SendNotificationsJob.queue(:main)
   end
 
-  every 1.hour, 'every-hour', :at => ['**:15'] do
+  every 1.hour, "every-hour", at: ["**:15"] do
     CheckAllDNSJob.queue(:main)
     ExpireHeldMessagesJob.queue(:main)
     CleanupAuthieSessionsJob.queue(:main)
   end
 
-  every 1.hour, 'every-hour', :at => ['**:45'] do
+  every 1.hour, "every-hour", at: ["**:45"] do
     PruneWebhookRequestsJob.queue(:main)
   end
 
-  every 1.day, 'every-day', :at => ['03:00'] do
+  every 1.day, "every-day", at: ["03:00"] do
     ProcessMessageRetentionJob.queue(:main)
     PruneSuppressionListsJob.queue(:main)
   end

config/environment.rb

@@ -1,5 +1,5 @@
 # Load the Rails application.
-require_relative 'application'
+require_relative "application"
 
 # Initialize the Rails application.
 Rails.application.initialize!

config/environments/development.rb

@@ -13,12 +13,12 @@ Rails.application.configure do
   config.consider_all_requests_local = true
 
   # Enable/disable caching. By default caching is disabled.
-  if Rails.root.join('tmp/caching-dev.txt').exist?
+  if Rails.root.join("tmp/caching-dev.txt").exist?
     config.action_controller.perform_caching = true
 
     config.cache_store = :memory_store
     config.public_file_server.headers = {
-      'Cache-Control' => 'public, max-age=172800'
+      "Cache-Control" => "public, max-age=172800"
     }
   else
     config.action_controller.perform_caching = false

config/environments/production.rb

@@ -34,7 +34,6 @@ Rails.application.configure do
   # config.action_dispatch.x_sendfile_header = 'X-Sendfile' # for Apache
   # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for NGINX
 
-
   # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
   # config.force_ssl = true
 
@@ -43,7 +42,7 @@ Rails.application.configure do
   config.log_level = :info
 
   # Prepend all log lines with the following tags.
-  config.log_tags = [ :request_id ]
+  config.log_tags = [:request_id]
 
   # Use a different cache store in production.
   # config.cache_store = :mem_cache_store
@@ -65,7 +64,7 @@ Rails.application.configure do
   config.active_support.deprecation = :notify
 
   # Use default logging formatter so that PID and timestamp are not suppressed.
-  config.log_formatter = ::Logger::Formatter.new
+  config.log_formatter = Logger::Formatter.new
 
   # Use a different logger for distributed setups.
   # require 'syslog/logger'

config/environments/test.rb

@@ -15,7 +15,7 @@ Rails.application.configure do
   # Configure public file server for tests with Cache-Control for performance.
   config.public_file_server.enabled = true
   config.public_file_server.headers = {
-    'Cache-Control' => 'public, max-age=3600'
+    "Cache-Control" => "public, max-age=3600"
   }
 
   # Show full error reports and disable caching.

config/initializers/assets.rb

@@ -1,7 +1,7 @@
 # Be sure to restart your server when you modify this file.
 
 # Version of your assets, change this if you want to expire all your assets.
-Rails.application.config.assets.version = '1.0'
+Rails.application.config.assets.version = "1.0"
 
 # Add additional assets to the asset load path
 # Rails.application.config.assets.paths << Emoji.images_path

config/initializers/inflections.rb

@@ -12,13 +12,13 @@
 
 # These inflection rules are supported but not enabled by default:
 ActiveSupport::Inflector.inflections(:en) do |inflect|
-  inflect.acronym 'API'
-  inflect.acronym 'SMTP'
-  inflect.acronym 'IP'
-  inflect.acronym 'DNS'
-  inflect.acronym 'UUID'
-  inflect.acronym 'HTTP'
-  inflect.acronym 'DB'
-  inflect.acronym 'MX'
-  inflect.acronym 'DKIM'
+  inflect.acronym "API"
+  inflect.acronym "SMTP"
+  inflect.acronym "IP"
+  inflect.acronym "DNS"
+  inflect.acronym "UUID"
+  inflect.acronym "HTTP"
+  inflect.acronym "DB"
+  inflect.acronym "MX"
+  inflect.acronym "DKIM"
 end

config/initializers/mail_extensions.rb

@@ -1,37 +1,38 @@
-require 'mail'
+require "mail"
 module Mail
+
   module Encodings
+
     # Handle windows-1258 as windows-1252 when decoding
-    def Encodings.q_value_decode(str)
-      str = str.sub(/\=\?windows-?1258\?/i, '\=?windows-1252?')
+    def self.q_value_decode(str)
+      str = str.sub(/=\?windows-?1258\?/i, '\=?windows-1252?')
       RubyVer.q_value_decode(str)
     end
-    def Encodings.b_value_decode(str)
-      str = str.sub(/\=\?windows-?1258\?/i, '\=?windows-1252?')
+
+    def self.b_value_decode(str)
+      str = str.sub(/=\?windows-?1258\?/i, '\=?windows-1252?')
       RubyVer.b_value_decode(str)
     end
+
   end
 
   class Message
+
     ## Extract plain text body of message
     def plain_body
-      if self.multipart? and self.text_part
-        self.text_part.decoded
-      elsif self.mime_type == 'text/plain' || self.mime_type.nil?
-        self.decoded
-      else
-        nil
+      if multipart? and text_part
+        text_part.decoded
+      elsif mime_type == "text/plain" || mime_type.nil?
+        decoded
       end
     end
 
     ## Extract HTML text body of message
     def html_body
-      if self.multipart? and self.html_part
-        self.html_part.decoded
-      elsif self.mime_type == 'text/html'
-        self.decoded
-      else
-        nil
+      if multipart? and html_part
+        html_part.decoded
+      elsif mime_type == "text/html"
+        decoded
       end
     end
 
@@ -46,9 +47,21 @@ module Mail
     # Returns the filename of the attachment (if it exists) or returns nil
     # Make up a filename for rfc822 attachments if it isn't specified
     def find_attachment
-      content_type_name = header[:content_type].filename rescue nil
-      content_disp_name = header[:content_disposition].filename rescue nil
-      content_loc_name = header[:content_location].location rescue nil
+      content_type_name = begin
+        header[:content_type].filename
+      rescue StandardError
+        nil
+      end
+      content_disp_name = begin
+        header[:content_disposition].filename
+      rescue StandardError
+        nil
+      end
+      content_loc_name = begin
+        header[:content_location].location
+      rescue StandardError
+        nil
+      end
 
       if content_type && content_type_name
         filename = content_type_name
@@ -56,56 +69,73 @@ module Mail
         filename = content_disp_name
       elsif content_location && content_loc_name
         filename = content_loc_name
-      elsif self.mime_type == "message/rfc822"
-        filename = "#{rand(100000000)}.eml"
+      elsif mime_type == "message/rfc822"
+        filename = "#{rand(100_000_000)}.eml"
       else
         filename = nil
       end
 
       if filename
         # Normal decode
-        filename = Mail::Encodings.decode_encode(filename, :decode) rescue filename
+        filename = begin
+          Mail::Encodings.decode_encode(filename, :decode)
+        rescue StandardError
+          filename
+        end
       end
       filename
     end
 
     def decode_body_as_text
       body_text = decode_body
-      charset_tmp = Encoding.find(Ruby19.pick_encoding(charset)) rescue 'ASCII'
-      charset_tmp = 'Windows-1252' if charset_tmp.to_s =~ /windows-?1258/i
-      if charset_tmp == Encoding.find('UTF-7')
-        body_text.force_encoding('UTF-8')
-        decoded = body_text.gsub(/\+.*?\-/m) {|n|Base64.decode64(n[1..-2]+'===').force_encoding('UTF-16BE').encode('UTF-8')}
+      charset_tmp = begin
+        Encoding.find(Ruby19.pick_encoding(charset))
+      rescue StandardError
+        "ASCII"
+      end
+      charset_tmp = "Windows-1252" if charset_tmp.to_s =~ /windows-?1258/i
+      if charset_tmp == Encoding.find("UTF-7")
+        body_text.force_encoding("UTF-8")
+        decoded = body_text.gsub(/\+.*?-/m) { |n| Base64.decode64(n[1..-2] + "===").force_encoding("UTF-16BE").encode("UTF-8") }
       else
         body_text.force_encoding(charset_tmp)
-        decoded = body_text.encode("utf-8", :invalid => :replace, :undef => :replace)
+        decoded = body_text.encode("utf-8", invalid: :replace, undef: :replace)
       end
-      decoded.valid_encoding? ? decoded : decoded.encode("utf-16le", :invalid => :replace, :undef => :replace).encode("utf-8")
+      decoded.valid_encoding? ? decoded : decoded.encode("utf-16le", invalid: :replace, undef: :replace).encode("utf-8")
     end
+
   end
 
   # Handle attached emails as attachments
   class AttachmentsList < Array
+
     def initialize(parts_list)
       @parts_list = parts_list
-      @content_disposition_type = 'attachment'
-      parts_list.map { |p|
+      @content_disposition_type = "attachment"
+      parts_list.map do |p|
         (p.parts.empty? and p.attachment?) ? p : p.attachments
-      }.flatten.compact.each { |a| self << a }
+      end.flatten.compact.each { |a| self << a }
       self
     end
+
   end
+
 end
 
 class Array
+
   def decoded
-    return nil if self.empty?
-    return self.first.decoded
+    return nil if empty?
+
+    first.decoded
   end
+
 end
 
 class NilClass
+
   def decoded
     nil
   end
+
 end

config/initializers/postal.rb

@@ -1,2 +1,2 @@
-require 'postal'
-require 'postal/message_db/mysql'
+require "postal"
+require "postal/message_db/mysql"

config/initializers/record_key_for_dom.rb

@@ -1,5 +1,6 @@
 module ActionView
   module RecordIdentifier
+
     def dom_id(record, prefix = nil)
       if record.new_record?
         dom_class(record, prefix || NEW)
@@ -8,5 +9,6 @@ module ActionView
         "#{dom_class(record, prefix)}#{JOIN}#{id}"
       end
     end
+
   end
 end

config/initializers/secret_key.rb

@@ -1,6 +1,6 @@
 if Postal.config.rails&.secret_key
   Rails.application.secrets.secret_key_base = Postal.config.rails.secret_key
 else
-  $stderr.puts "No secret key was specified in the Postal config file. Using one for just this session"
+  warn "No secret key was specified in the Postal config file. Using one for just this session"
   Rails.application.secrets.secret_key_base = SecureRandom.hex(128)
 end

config/initializers/secure_headers.rb

@@ -1,10 +1,8 @@
 SecureHeaders::Configuration.default do |config|
-
   config.hsts = SecureHeaders::OPT_OUT
 
   config.csp[:default_src] = []
   config.csp[:script_src] = ["'self'"]
   config.csp[:child_src] = ["'self'"]
   config.csp[:connect_src] = ["'self'"]
-
 end

config/initializers/sentry.rb

@@ -1,14 +1,14 @@
-require 'postal/config'
+require "postal/config"
 
 if Postal.config.general&.exception_url
-  require 'raven'
+  require "raven"
   Raven.configure do |config|
     config.dsn = Postal.config.general.exception_url
-    config.environments = ['production']
-    if ENV['DEV_EXCEPTIONS']
-      config.environments << 'development'
+    config.environments = ["production"]
+    if ENV["DEV_EXCEPTIONS"]
+      config.environments << "development"
     end
     config.silence_ready = true
-    config.tags = {:process => ENV['PROC_NAME']}
+    config.tags = { process: ENV.fetch("PROC_NAME", nil) }
   end
 end

config/initializers/session_store.rb

@@ -1,3 +1,3 @@
 # Be sure to restart your server when you modify this file.
 
-Rails.application.config.session_store :cookie_store, key: '_postal_session'
+Rails.application.config.session_store :cookie_store, key: "_postal_session"

config/initializers/smtp.rb

@@ -1,5 +1,5 @@
-require 'postal/config'
+require "postal/config"
 if Postal.config&.smtp
   ActionMailer::Base.delivery_method = :smtp
-  ActionMailer::Base.smtp_settings = {:address => Postal.config.smtp.host, :user_name => Postal.config.smtp.username, :password => Postal.config.smtp.password, :port => Postal.config.smtp.port || 25}
+  ActionMailer::Base.smtp_settings = { address: Postal.config.smtp.host, user_name: Postal.config.smtp.username, password: Postal.config.smtp.password, port: Postal.config.smtp.port || 25 }
 end

config/initializers/smtp_extensions.rb

@@ -1,10 +1,13 @@
 class Net::SMTP::Response
+
   def message
     @string
   end
+
 end
 
 class Net::SMTP
+
   attr_accessor :source_address
 
   def secure_socket?
@@ -19,7 +22,7 @@ class Net::SMTP
   #
   def rset
     @error_occurred = false
-    getok('RSET')
+    getok("RSET")
   end
 
   def rset_errors
@@ -29,6 +32,7 @@ class Net::SMTP
   private
 
   def tcp_socket(address, port)
-    TCPSocket.open(address, port, self.source_address)
+    TCPSocket.open(address, port, source_address)
   end
+
 end

config/initializers/trusted_proxies.rb

@@ -1,9 +1,13 @@
 module Rack
   class Request
+
     module Helpers
+
       def trusted_proxy?(ip)
         ip =~ /^127\.0\.0\.1$|^localhost$|^unix$$/i
       end
+
     end
+
   end
 end

config/puma.rb

@@ -1,9 +1,9 @@
-require_relative '../lib/postal/config'
+require_relative "../lib/postal/config"
 threads_count = Postal.config.web_server&.max_threads&.to_i || 5
 threads         threads_count, threads_count
-bind_address  = Postal.config.web_server&.bind_address || '127.0.0.1'
-bind_port     = Postal.config.web_server&.port&.to_i || ENV['PORT'] || 5000
+bind_address  = Postal.config.web_server&.bind_address || "127.0.0.1"
+bind_port     = Postal.config.web_server&.port&.to_i || ENV["PORT"] || 5000
 bind            "tcp://#{bind_address}:#{bind_port}"
-environment     Postal.config.rails&.environment || 'development'
+environment     Postal.config.rails&.environment || "development"
 prune_bundler
 quiet false