Topic: Mail server not working

[edb]

SME v6.01
Just installed SpamAss night previous and all seemed to be working fine. ISP decided to change my block of IPs so I had to reconfigure server to reflect the new IP assignment, but now no one can seem to get or send email. All is configured properly on the SME server side but I was wondering about the SpamAssasin part of it since I had to reboot after changing the server IP.
If I telnet to port 110 or 25 I get the standard OK message, which leads me to believe both POP3 and SMTP are running.Any ideas as to what may have happened?

[edb]

Here is the error that users are getting:

The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was 'xxxxx@xxxx.ca'. Subject 'Test', Account: '', Server: '', Protocol: SMTP, Server Response: '451 postmaster@localhost', Port: 25, Secure(SSL): No, Server Error: 451, Error Number: 0x800CCC79

[edb]

What I had to do was to disable SpamAssassin through server manager, then remove all the RBL lists, save the changes, then reboot the server.
Problem solved  

[raem]

edb
> ......then remove all the RBL lists

A search on
451 postmaster@localhost
would have found this answer, the problem is one list apparently giving out "bad" information. See
http://forums.contribs.org/index.php?topic=23573.0