MX records and port forwarding to a mail server

[ndelo]

Question: what IP would my MX records have to reflect if I am using IPmasqurading and port forwarding on the firewall to route traffic toport 25 for a sendmail server in my DMZ? Would it be the IP of the firewall? Or do I need to leave that port open on the firewall, give the sendmail server a live IP and route traffic to the DMZ?

[Cruiserman]

Im working on the same thing. I am running an lrp as my router firewall and my server/workstations are behind it. You will need to register the ip of the firewall to your DMZ. In the router, point the smtp request to your mails server. in the lrp there are 2 places that need to be changed:
ETERN_TCP_PORTS="0/0_stmp .......
INTERN_SMTP_SERVER=192.168.1.200 #change this to reflect the mail server ip. good luck. esp with configuring sendmail, thats were im stuck. i may use qmail instead.

[ndelo]

Thanks for the info, I'll give it a try.