fix: explicitly disable TLS & starttls for unknown SSL modes

closes #2564

lib/postal/smtp_sender.rb

@@ -58,6 +58,7 @@ module Postal
               # Set the source IP as appropriate
               smtp_client.source_address = ip_type == :aaaa ? @source_ip_address.ipv6 : @source_ip_address.ipv4
             end
+
             case ssl_mode
             when "Auto"
               smtp_client.enable_starttls_auto(self.class.ssl_context_without_verify)
@@ -65,6 +66,9 @@ module Postal
               smtp_client.enable_starttls(self.class.ssl_context_with_verify)
             when "TLS"
               smtp_client.enable_tls(self.class.ssl_context_with_verify)
+            else
+              smtp_client.disable_starttls
+              smtp_client.disable_tls
             end
 
             smtp_client.start(@source_ip_address ? @source_ip_address.hostname : self.class.default_helo_hostname)

script/send_html_email.rb

@@ -40,10 +40,24 @@ mail.html_part = Mail::Part.new do
   BODY
 end
 
-# puts mail.to_s
+c = OpenSSL::SSL::SSLContext.new
+c.verify_mode = OpenSSL::SSL::VERIFY_NONE
 
+<<<<<<< Updated upstream
 Net::SMTP.start("127.0.0.1", 2525) do |smtp|
   smtp.send_message mail.to_s, mail.from.first, mail.to.first
 end
+=======
+1000.times.map do
+  Thread.new do
+    smtp = Net::SMTP.new("77.72.7.155", 25)
+    # smtp.enable_starttls(c)
+    smtp.disable_starttls
+    smtp.start("localhost")
+    smtp.send_message mail.to_s, mail.from.first, mail.to.first
+    smtp.finish
+  end
+end.each(&:join)
+>>>>>>> Stashed changes
 
 puts "Sent"