I am wondering if anyone knows of a way to Route all outbound SMTP traffic through a specific IP address. Here is the Scenario:
I have a SonicWall with enhanced OS. It of course has a WAN IP address. It also has 2 IP addresses associated with the OPT port for public servers. I recently changed the IP address of my mail server from public to private. What i am looking to do is tell the SonicWall to take any SMTP (Or all traffic if that is easier) and send it out of one of the IP addresses associated with the OPT interface.
The reason for my doing this is that the MX record is pointed to one of the IP addresses of the OPT port. If I send mail out and it goes out of the IP that is associated with the WAN port (Different than the OPT IP) it is categorized as SPAM as the MX reverse look up is bad.
If anyone can provide any opinions or solutions it would be greatly appreciated.