We've been having some delivery issues, so I decided to test our gateway server for its reputation and relaying. This server runs IIS 6 SMTP virtual server and Sophos Puremessage. Using the tests at http://www.abuse.net/relay.html
, the server passes all until test 8, which returns:
Relay test 8
<<< 250 2.0.0 Resetting
>>> MAIL FROM:<spamtest@[XXX.XXX.XX
<<< 250 2.1.0 spamtest@[XXX.XXX.XXX.XXX]
>>> RCPT TO:<"firstname.lastname@example.org
<<< 250 2.1.5 "email@example.com"@m
Relay test result
Hmmn, at first glance, host appeared to accept a message for relay.
(Where XXX.XXX.XXX.XXX is the IP address of our gateway server and mailgateway.ourdomain.edu is the FQDN of the server running IIS and Puremessage.
How do I configure the server to pass this test? Does this test really matter when it passes the others? The mail is of a form that could not be delivered since the gateway only relays mail to our internal Exchange server (so far as I can see).