Richard Baxant wrote:
I have an external ip address that goes through my router (hardware firewall) to my webserver box (192.168.x.1) and my qmailtoaster box (192.168.x.2). I can send and receive email through my qmailtoaster box without any issues. The problem is when I try to send mail form my webserver box and I get the error: <<< 511 sorry, can't find a valid MX for sender domain (#5.1.1 - chkuser)
554 5.0.0 Service unavailable. What am I missing here?

The problem is your webserver box's configuration. I usually use postfix on such hosts, and configure it to send to the QMT host with authentication. Check the list archive for postfix configuration notes. I believe I posted them not too long ago.

--
-Eric 'shubes'


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