This also assumes, btw that users are using a separate server for sending email. Of course, another option would be to block port 25 to everything except the two postfix servers.
Richard At 07:21 PM 10/16/2003 -0400, you wrote: >I've found that a lot of spammers seem to bypass Postfix, and send directly >to the IMail server, so that no spam filtering is done. So, after making >sure DNS has updated, I put the following rule in IMail: > >In rules.ima >H!~63.166.78.22!AND!H!~63.166.78.11:NUL > >Where the two IP addresses are that of the two Postfix servers. I >currently (rather than the NUL) have it forwarding to a mailbox, so I can >verify they are all indeed SPAM messages. So far, it's catching quite a >few, with no false positives. > >Richard Bewley
