Did you try to append IP address of your remote VPS in Postfix parameter "mynetworks=" on iRedMail server?
Was this the solution.
Have a VPS with MailMan on it accessible via private IP and want to relay inbound mail from IredMail VPS to the Mailman vps and the have mailman relay back through public IP of iRedMail? What is the best practice for this and should be done in the main.cf for relays. Have that set for the Mailman but appears to not be relaying.
This does not seem appropriate for couple reasons: distro and differnet VPS.
http://www.howtoforge.com/installing-ir … an-squeeze
