From: spamassassin-talk-admin@lists.sourceforge.net  Thu Aug 29 11:07:57 2002
Return-Path: <spamassassin-talk-admin@example.sourceforge.net>
Delivered-To: yyyy@localhost.netnoteinc.com
Received: from localhost (localhost [127.0.0.1])
	by phobos.labs.netnoteinc.com (Postfix) with ESMTP id C123A44162
	for <jm@localhost>; Thu, 29 Aug 2002 06:06:00 -0400 (EDT)
Received: from phobos [127.0.0.1]
	by localhost with IMAP (fetchmail-5.9.0)
	for jm@localhost (single-drop); Thu, 29 Aug 2002 11:06:00 +0100 (IST)
Received: from usw-sf-list2.sourceforge.net (usw-sf-fw2.sourceforge.net
    [216.136.171.252]) by dogma.slashnull.org (8.11.6/8.11.6) with ESMTP id
    g7T0AMZ19081 for <jm-sa@jmason.org>; Thu, 29 Aug 2002 01:10:22 +0100
Received: from usw-sf-list1-b.sourceforge.net ([10.3.1.13]
    helo=usw-sf-list1.sourceforge.net) by usw-sf-list2.sourceforge.net with
    esmtp (Exim 3.31-VA-mm2 #1 (Debian)) id 17kCqC-0004QL-00; Wed,
    28 Aug 2002 17:07:16 -0700
Received: from sccrmhc01.attbi.com ([204.127.202.61]) by
    usw-sf-list1.sourceforge.net with esmtp (Exim 3.31-VA-mm2 #1 (Debian)) id
    17kCpc-00060j-00 for <spamassassin-talk@lists.sourceforge.net>;
    Wed, 28 Aug 2002 17:06:40 -0700
Received: from localhost ([12.229.66.144]) by sccrmhc01.attbi.com
    (InterMail vM.4.01.03.27 201-229-121-127-20010626) with ESMTP id
    <20020829000611.QMMF11061.sccrmhc01.attbi.com@localhost> for
    <spamassassin-talk@lists.sourceforge.net>; Thu, 29 Aug 2002 00:06:11 +0000
Subject: Re: [SAtalk] O.T. Habeus -- Why?
Content-Type: text/plain; charset=US-ASCII; format=flowed
MIME-Version: 1.0 (Apple Message framework v482)
From: Brian McNett <bmcnett@radparker.com>
To: spamassassin-talk@example.sourceforge.net
Content-Transfer-Encoding: 7bit
In-Reply-To: <1030567825.3271.TMDA@omega.paradigm-omega.net>
Message-Id: <135470FA-BAE3-11D6-AD60-003065C182B0@radparker.com>
X-Mailer: Apple Mail (2.482)
Sender: spamassassin-talk-admin@example.sourceforge.net
Errors-To: spamassassin-talk-admin@example.sourceforge.net
X-Beenthere: spamassassin-talk@example.sourceforge.net
X-Mailman-Version: 2.0.9-sf.net
Precedence: bulk
List-Help: <mailto:spamassassin-talk-request@example.sourceforge.net?subject=help>
List-Post: <mailto:spamassassin-talk@example.sourceforge.net>
List-Subscribe: <https://example.sourceforge.net/lists/listinfo/spamassassin-talk>,
    <mailto:spamassassin-talk-request@lists.sourceforge.net?subject=subscribe>
List-Id: Talk about SpamAssassin <spamassassin-talk.example.sourceforge.net>
List-Unsubscribe: <https://example.sourceforge.net/lists/listinfo/spamassassin-talk>,
    <mailto:spamassassin-talk-request@lists.sourceforge.net?subject=unsubscribe>
List-Archive: <http://www.geocrawler.com/redir-sf.php3?list=spamassassin-talk>
X-Original-Date: Wed, 28 Aug 2002 17:05:49 -0700
Date: Wed, 28 Aug 2002 17:05:49 -0700
X-Pyzor: Reported 0 times.
X-Spam-Status: No, hits=-5.3 required=7.0
	tests=EMAIL_ATTRIBUTION,FUDGE_MULTIHOP_RELAY,IN_REP_TO,
	      KNOWN_MAILING_LIST,RCVD_IN_MULTIHOP_DSBL,
	      RCVD_IN_UNCONFIRMED_DSBL,SPAM_PHRASE_00_01,
	      USER_AGENT_APPLEMAIL
	version=2.40-cvs
X-Spam-Level: 


On Wednesday, August 28, 2002, at 01:50  PM, Robin Lynn Frank wrote:

> And if a spammer forges headers???

Header forgeries are trivially easy to detect. The main way that 
spammers hide their originating IPs is not by forging headers, 
but by sending through open proxy servers.  It used to be that 
spammers used open relay mailserver, but these often betray the 
originating IP, and the proliferation of open relay blocklists, 
and the introduction of port 25 blocking on the part of many 
ISPs make open relays unattractive to spammers.

One would think, that the combination of a forged Habeas-SWE, 
and mail sent through an anonymizing open proxy would be a 
fairly good indication of spam.  Tracking a spammer to his 
meatspace location is not as difficult as you might think, once 
you have legal recourse to subpoena records.

--B



-------------------------------------------------------
This sf.net email is sponsored by: Jabber - The world's fastest growing 
real-time communications platform! Don't just IM. Build it in! 
http://www.jabber.com/osdn/xim
_______________________________________________
Spamassassin-talk mailing list
Spamassassin-talk@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/spamassassin-talk

