Gary V wrote:
Sorry for the OT question but just need a quick answer from a postfix
expert.

Here's the problem. I run a front end spam filtering service. Email from
the world comes in, I clean it, and send the good email to the original
server. However sometimes because my service is now the primary MX when
I forward the good email the recipient server (running Postix) rejects
the email (relaying denied) because it no longer things it is hosting
the domain locally.

How do I tell postfix that it is the final destination of email for
domains where it is not the primary MX?

Thanks in advance.


I think Postfix may know it's the final destination for the domains in question, otherwise ALL mail would be rejected.

Actually that's what is happening. When they moved the MX to point to our spam filter servers their server started rejecting ALL their email that we are forwarding. The thing that changed on their server is that the domains they host are no longer the primary MX. What I'm trying to find out is how to overrider the requirement that the primary MX has to point to the Postfix server.

Internet ---> junkemailfilter.com ---> postfix server

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