> From: Neil Schemenauer
> Sent: Monday, January 10, 2005 2:01 PM

<...>

> I now have a SMTP reverse proxy that uses Spambayes and a
> CDB database.  Bouncing high scoring spam is necessary for me
> because I can't review it all.

That's great!  I hope when you say "bounce" you actually mean reject at the
end of data.  Rejecting unwanted messages is the way to go, because even in
the rare event of a false positive, the sender gets a DSN and there's no
backscatter.  If that's what you are doing, please ignore the following,
which is for those who still send DSN's for spam.

Bouncing spam after acceptance is a real problem, even though false
positives would still get a DSN.  The problem is that in the majority of
spam, both the MAIL FROM: and the From: addresses are forged.  Sending a
bounce just abuses innocent third parties, in addition to giving the spammer
a second chance to get their payload delivered.

--

Seth Goodman

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