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I have a Postfix server running RedHat 9.0. It is sending and receiving email just fine to and from other email servers outside our intranet.
The problem is that I have another server running M$ exchange that I need to be able to send emails to as well. While I can receive mail from this server, I can't send mail to it.
Whenever I try and send mail to an email address that is hosted by this server the Linux box seems to have trouble knowing which of my servers is the email server. It is trying to connect on port 25 to the servers I have set up as the dns servers or to our web server.
I checked the mx record in my dns server and it is set up correctly.
There you go with the names changed o protect the inocent. It not getting an answer. Can I set up a local MX record like a host file telling my linux server which server to contact when sending mail to firstdomain.edu?