I have 3 domains that each have a mx record that point to a another mx (x.x.x.82) that directs all mail to the firewall. The firewall does its bit and sends on to the internal mail server. All has worked great since set up about 6 months ago with some help from this forum. Have had a few quirks here and there, but here recently I had a major one that led to another I need to solve.
Clients started getting 451; temporary local error bounce backs. Started out of the blue monday. Finally today I solved it by adding my external IP of my firewall to the allowed hosts for relay (x.x.x.66). To be honest, not sure why it fixed this but now .82 and .66 are in the list and the error seems to have gone. However some other bounce backs to my employees when they mail out because it shows that the mail is coming from the .66, and this has gone on since installation. How do I make outgoing mail run through the .82 interface so other mail servers don't freak over the mismatch?
This thread was automatically locked due to age.
