Date: Fri, 07 Nov 1997 17:28:24 -0800 From: Colin Jensen <cj@accom.com> To: "Jonathan M. Bresler" <jmb@FreeBSD.ORG> Cc: chat@hub.freebsd.org Subject: Re: X-UIDL and X-PMFLAGS Message-ID: <3463C038.3F54BC7E@accom.com> References: <199711072146.NAA26301@hub.freebsd.org>
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I use a procmail based filter called junkfilter (available from <http://www.pobox.com/~gsutter/junkmail>) to kill junkmail. One nice thing about it is that it documents each of its rules and explains why they work. For X-UIDL, the check for spam says: +--- | # Invalid X-UIDL header (inserted by POP3 servers/clients). Valid ones have | # exactly 32 hexadecimal characters. +--- And for the Authenticated Sender, it says: +--- | # Pegasus mailer is the only mailer which legitimately generates | # "Comments: Authenticated sender is ..." so kill anything else. +--- Since October 7, junkfilter killed 38 of 41 spams I've received, without killing any mail I wanted to keep. Does anyone have any other junk filters they can recommend? - Colin
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