[TriLUG] Sendmail is spamming

[Joseph Mack NA3T]

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

-- 
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) wm7d (dot) net - azimuthal equidistant map
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