postal/doc/config/yaml.yml

version: 2

postal:
  # The hostname that the Postal web interface runs on
  web_hostname: postal.example.com
  # The HTTP protocol to use for the Postal web interface
  web_protocol: https
  # The hostname that the Postal SMTP server runs on
  smtp_hostname: postal.example.com
  # Should IP pools be enabled for this installation?
  use_ip_pools: false
  # The maximum number of delivery attempts
  default_maximum_delivery_attempts: 18
  # The number of days to hold a message before they will be expired
  default_maximum_hold_expiry_days: 7
  # The number of days an address will remain in a suppression list before being removed
  default_suppression_list_automatic_removal_days: 30
  # The default threshold at which a message should be treated as spam
  default_spam_threshold: 5
  # The default threshold at which a message should be treated as spam failure
  default_spam_failure_threshold: 20
  # Domain verification and checking usually checks with a domain's nameserver. Enable this to check with the server's local nameservers.
  use_local_ns_for_domain_verification: false
  # Append a Resend-Sender header to all outgoing e-mails
  use_resent_sender_header: true
  # Path to the private key used for signing
  signing_key_path: $config-file-root/signing.key
  # An array of SMTP relays in the format of smtp://host:port
  smtp_relays: []
  # An array of IP addresses to trust for proxying requests to Postal (in addition to localhost addresses)
  trusted_proxies: []
  # The number of days after which to consider a lock as stale. Messages with stale locks will be removed and not retried.
  queued_message_lock_stale_days: 1
  # When enabled queued messages will be de-queued in batches based on their destination
  batch_queued_messages: true

web_server:
  # The default port the web server should listen on unless overriden by the PORT environment variable
  default_port: 5000
  # The default bind address the web server should listen on unless overriden by the BIND_ADDRESS environment variable
  default_bind_address: 127.0.0.1
  # The maximum number of threads which can be used by the web server
  max_threads: 5

worker:
  # The default port for the worker health server to listen on
  default_health_server_port: 9090
  # The default bind address for the worker health server to listen on
  default_health_server_bind_address: 127.0.0.1
  # The number of threads to execute within each worker
  threads: 2

main_db:
  # Hostname for the main MariaDB server
  host: localhost
  # The MariaDB port to connect to
  port: 3306
  # The MariaDB username
  username: postal
  # The MariaDB password
  password: 
  # The MariaDB database name
  database: postal
  # The maximum size of the MariaDB connection pool
  pool_size: 5
  # The encoding to use when connecting to the MariaDB database
  encoding: utf8mb4

message_db:
  # Hostname for the MariaDB server which stores the mail server databases
  host: localhost
  # The MariaDB port to connect to
  port: 3306
  # The MariaDB username
  username: postal
  # The MariaDB password
  password: 
  # The encoding to use when connecting to the MariaDB database
  encoding: utf8mb4
  # The MariaDB prefix to add to database names
  database_name_prefix: postal

logging:
  # Enable the default Rails logger
  rails_log_enabled: false
  # A DSN which should be used to report exceptions to Sentry
  sentry_dsn: 
  # Enable the Postal logger to log to STDOUT
  enabled: true
  # Enable highlighting of log lines
  highlighting_enabled: false

gelf:
  # GELF-capable host to send logs to
  host: 
  # GELF port to send logs to
  port: 12201
  # The facility name to add to all log entries sent to GELF
  facility: postal

smtp_server:
  # The default port the SMTP server should listen on unless overriden by the PORT environment variable
  default_port: 25
  # The default bind address the SMTP server should listen on unless overriden by the BIND_ADDRESS environment variable
  default_bind_address: ::
  # The default port for the SMTP server health server to listen on
  default_health_server_port: 9091
  # The default bind address for the SMTP server health server to listen on
  default_health_server_bind_address: 127.0.0.1
  # Enable TLS for the SMTP server (requires certificate)
  tls_enabled: false
  # The path to the SMTP server's TLS certificate
  tls_certificate_path: $config-file-root/smtp.cert
  # The path to the SMTP server's TLS private key
  tls_private_key_path: $config-file-root/smtp.key
  # Override ciphers to use for SSL
  tls_ciphers: 
  # The SSL versions which are supported
  ssl_version: SSLv23
  # Enable proxy protocol for use behind some load balancers (supports proxy protocol v1 only)
  proxy_protocol: false
  # Enable connection logging
  log_connections: false
  # The maximum message size to accept from the SMTP server (in MB)
  max_message_size: 14
  # A regular expression to use to exclude connections from logging
  log_ip_address_exclusion_matcher: 

dns:
  # The names of the default MX records
  mx_records:
    - mx1.postal.example.com
    - mx2.postal.example.com
  # The location of the SPF record
  spf_include: spf.postal.example.com
  # The return path hostname
  return_path_domain: rp.postal.example.com
  # The domain to use for hosting route-specific addresses
  route_domain: routes.postal.example.com
  # The CNAME which tracking domains should be pointed to
  track_domain: track.postal.example.com
  # The hostname to use in HELO/EHLO when connecting to external SMTP servers
  helo_hostname: 
  # The identifier to use for DKIM keys in DNS records
  dkim_identifier: postal
  # The prefix to add before TXT record verification string
  domain_verify_prefix: postal-verification
  # The domain to use on external domains which points to the Postal return path domain
  custom_return_path_prefix: psrp
  # The timeout to wait for DNS resolution
  timeout: 5
  # The path to the resolv.conf file containing addresses for local nameservers
  resolv_conf_path: /etc/resolv.conf

smtp:
  # The hostname to send application-level e-mails to
  host: 127.0.0.1
  # The port number to send application-level e-mails to
  port: 25
  # The username to use when authentication to the SMTP server
  username: 
  # The password to use when authentication to the SMTP server
  password: 
  # The type of authentication to use
  authentication_type: login
  # Use STARTTLS when connecting to the SMTP server and fail if unsupported
  enable_starttls: false
  # Detects if STARTTLS is enabled in the SMTP server and starts to use it
  enable_starttls_auto: true
  # When using TLS, you can set how OpenSSL checks the certificate. Use 'none' for no certificate checking
  openssl_verify_mode: peer
  # The name to use as the from name outgoing emails from Postal
  from_name: Postal
  # The e-mail to use as the from address outgoing emails from Postal
  from_address: postal@example.com

rails:
  # The Rails environment to run the application in
  environment: production
  # The secret key used to sign and encrypt cookies and session data in the application
  secret_key: 

rspamd:
  # Enable rspamd for message inspection
  enabled: false
  # The hostname of the rspamd server
  host: 127.0.0.1
  # The port of the rspamd server
  port: 11334
  # Enable SSL for the rspamd connection
  ssl: false
  # The password for the rspamd server
  password: 
  # Any flags for the rspamd server
  flags: 

spamd:
  # Enable SpamAssassin for message inspection
  enabled: false
  # The hostname for the SpamAssassin server
  host: 127.0.0.1
  # The port of the SpamAssassin server
  port: 783

clamav:
  # Enable ClamAV for message inspection
  enabled: false
  # The host of the ClamAV server
  host: 127.0.0.1
  # The port of the ClamAV server
  port: 2000

smtp_client:
  # The open timeout for outgoing SMTP connections
  open_timeout: 30
  # The read timeout for outgoing SMTP connections
  read_timeout: 30

migration_waiter:
  # Wait for all migrations to run before starting a process
  enabled: false
  # The number of attempts to try waiting for migrations to complete before start
  attempts: 120
  # The number of seconds to wait between each migration check
  sleep_time: 2

oidc:
  # Enable OIDC authentication
  enabled: false
  # When enabled, users with passwords will still be able to login locally. If disable, only OpenID Connect will be available.
  local_authentication_enabled: true
  # The name of the OIDC provider as shown in the UI
  name: OIDC Provider
  # The OIDC issuer URL
  issuer: 
  # The client ID for OIDC
  identifier: 
  # The client secret for OIDC
  secret: 
  # Scopes to request from the OIDC server.
  scopes:
    - openid,email
  # The field to use to determine the user's UID
  uid_field: sub
  # The field to use to determine the user's email address
  email_address_field: email
  # The field to use to determine the user's name
  name_field: name
  # Enable discovery to determine endpoints from .well-known/openid-configuration from the Issuer
  discovery: true
  # The authorize endpoint on the authorization server (only used when discovery is false)
  authorization_endpoint: 
  # The token endpoint on the authorization server (only used when discovery is false)
  token_endpoint: 
  # The user info endpoint on the authorization server (only used when discovery is false)
  userinfo_endpoint: 
  # The JWKS endpoint on the authorization server (only used when discovery is false)
  jwks_uri: