On Fri, 13 Oct 2006, Roy Vestal wrote:
I'm working with a local non-profit that has a spam problem. They have a
mailing list and some of the spam we get in the majordomo list is being sent
to. The majordomo program parses this email looking for valid maillist
commands, then it sends a response to the originating email address.
Since the original email address is bogus,
I'm not an e-mail expert either, but something that would
help is a spam filter that rejects the e-mail from the bogus
e-mail address in the first place. On receipt of an e-mail
connect request from the sender, the MTA does a connect back
to the originating MTA with a RCPT command, to see if the
sender is known by the MTA. If not, the e-mail is rejected.
I believe postfix has this built in.
Joe
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Joseph Mack NA3T EME(B,D), FM05lw North Carolina
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