Hi I'm using a similar setup here, and find that it works very well. My configuration is:
* Addresses are aliases on top-level domain that redirect to same address name on subdomain * Subdomain is defined in DNS with a single MX record pointing to the subdomain name, which has an A record pointing to the RT host * Postfix configured to use a smarthost with SMTP+TLS and authentication for outbound mail The aliases rewrite the destination addresses so I don't have to play games with telling Postfix that it handles mail for the top level domain by putting it in `mydestination`. Nor did I have to change postfix's `origin`; you can set the email sender address in RT, so it's quite fine for postfix to announce its self as the subdomain while delivering mail with "From:" headers of the main domain. The user never sees the subdomain addresses in email. All I had to do was add: relayhost = [my.smtp.smarthost]:587 smtp_sasl_auth_enable = yes smtp_sasl_password_maps = hash:/etc/postfix/maps/relay_password smtp_sasl_security_options = to main.cf, create /etc/postfix/maps/relay_password as: my.smtp.smarthost smtp-username:smtp-password and postmap it. Then for each of my queues I just entered the top-level domain aliases for the correspond and comment addresses, so RT would use these correctly in outbound mail. Hope this is useful. -- Craig Ringer -- RT training in Amsterdam, March 20-21: http://bestpractical.com/services/training.html Help improve RT by taking our user survey: https://www.surveymonkey.com/s/N23JW9T
