Am having problem setting up a Pix 501 on a small home office network. WAN port is currently holding the MX address for my domain (100.X.X.175) and the LAN port (192.168.1.1) sits on the same switch as the Exchange server (192.168.1.3).
There is no problem setting up the basic system and am using PAT to send all Inside information to the outside using the outside interface, so email out has no problem.
The issue is receiving email to the exchange server. Have entered the following commands that I believed would be enough (rest of the set-up prior to these commands could have been achieved by PDM or on command line and have tried both just in case).
static (inside,outside) tcp 100.X.X.175 25 192.168.1.3 25 netmask 255.255.255.255
access-list permit_mail_in permit tcp any host 100.X.X.175 eq 25
access-group permit_mail_in in interface outside
no fixup protocol smtp 25 (have tried with or without)
I am somewhat stumped now any clues on what I may have missed??