[NTLUG:Discuss] Mail server issues....

[Douglas King]

Recently, I moved a couple of mail servers behind a Smoothwall 
firewall.  Now the mail list server (Mailman) and the primary mail servers 
no longer are "talking" to each other?  Prior to the move, all the servers 
had routable IP's on them.  Now they carry 172.16.x.x IP's behind the firewall.

Does anyone have any suggestions as to WHAT I need to do to get these 
machines talking again?