12 messages in net.sourceforge.lists.courier-maildropRe: [maildropl] bouncing spam with ma...
FromSent OnAttachments
Generic PlayerOct 1, 2003 10:14 am 
Michael T. BabcockOct 1, 2003 10:30 am 
Erik BourgetOct 1, 2003 10:37 am 
Petri RiihikallioOct 1, 2003 10:46 am 
Rolan YangOct 1, 2003 11:18 am 
Júlio Espada OlivaresOct 1, 2003 11:46 am 
Generic PlayerOct 1, 2003 2:55 pm 
Eric SOct 1, 2003 4:16 pm 
Alain NAKACHEOct 2, 2003 1:14 am 
Chris BreuOct 2, 2003 6:46 am 
Eric SOct 2, 2003 9:31 am 
Michael T. BabcockOct 6, 2003 5:44 am 
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Subject:Re: [maildropl] bouncing spam with maildropActions...
From:Michael T. Babcock (mbab@fibrespeed.net)
Date:Oct 6, 2003 5:44:46 am
List:net.sourceforge.lists.courier-maildrop

Rolan Yang wrote:

A while back, when I was receiving 400+ spam emails a day, I did an experiment with a maildrop filter that would detect spam and send a bogus "undeliverable" message back to the sender. Most of the spam does have forged headers and sad to say, the experiment did not reduce the incoming spam by any detectable level.

However, I'm currently using a PERL filter on my incoming messages via qmail so that it bounces messages for various reasons with 5xx errors instead of accepting them. This includes messages with potential viruses and seemingly forged headers or bad formatting.

-- Michael T. Babcock C.T.O., FibreSpeed Ltd. http://www.fibrespeed.net/~mbabcock