[TriLUG] Sendmail is spamming
Joseph Mack NA3T
jmack at wm7d.net
Fri Oct 13 10:33:23 EDT 2006
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.
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) wm7d (dot) net - azimuthal equidistant map
generator at http://www.wm7d.net/azproj.shtml
Homepage http://www.austintek.com/ It's GNU/Linux!
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