From owner-freebsd-questions@FreeBSD.ORG  Thu Oct 16 16:10:01 2008
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id AAB731065686
	for <freebsd-questions@freebsd.org>;
	Thu, 16 Oct 2008 16:10:01 +0000 (UTC) (envelope-from LukeD@pobox.com)
Received: from sasl.smtp.pobox.com (a-sasl-fastnet.sasl.smtp.pobox.com
	[207.106.133.19])
	by mx1.freebsd.org (Postfix) with ESMTP id 7A63E8FC27
	for <freebsd-questions@freebsd.org>;
	Thu, 16 Oct 2008 16:10:01 +0000 (UTC) (envelope-from LukeD@pobox.com)
Received: from localhost.localdomain (localhost [127.0.0.1])
	by a-sasl-fastnet.sasl.smtp.pobox.com (Postfix) with ESMTP id
	0B7CF6F24E; Thu, 16 Oct 2008 11:55:04 -0400 (EDT)
Received: from lukas.is-a-geek.org
	(pool-71-113-98-220.sttlwa.dsl-w.verizon.net [71.113.98.220]) (using
	TLSv1
	with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate
	requested) by a-sasl-fastnet.sasl.smtp.pobox.com (Postfix) with ESMTPSA
	id A868F6F24A; Thu, 16 Oct 2008 11:55:01 -0400 (EDT)
Date: Thu, 16 Oct 2008 08:54:55 -0700 (PDT)
From: Luke Dean <LukeD@pobox.com>
X-X-Sender: lukas@border.lukas.is-a-geek.org
To: Matthew Seaman <m.seaman@infracaninophile.co.uk>
In-Reply-To: <48F75A88.1000507@infracaninophile.co.uk>
Message-ID: <alpine.BSF.2.00.0810160846040.473@border.lukas.is-a-geek.org>
References: <20081016090102.17qwm4xcs6f4so8ok@intranet.casasponti.net>
	<20081016145255.GA12638@icarus.home.lan>
	<48F75A88.1000507@infracaninophile.co.uk>
User-Agent: Alpine 2.00 (BSF 1167 2008-08-23)
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
X-Pobox-Relay-ID: CBF8814A-9B9A-11DD-A9EC-1E1F86D30F62-96347044!a-sasl-fastnet.pobox.com
Cc: freebsd-questions@freebsd.org
Subject: Re: I've just found a new and interesting spam source - legitimate
 bounce messages
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
Reply-To: Luke Dean <LukeD@pobox.com>
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 16 Oct 2008 16:10:01 -0000



On Thu, 16 Oct 2008, Matthew Seaman wrote:

> Until the wonderful day that the entire internet abides by these rules[*], 
> use
> of technologies like SPF and DKIM can discourage but not entirely prevent the
> spammers from joe-jobbing you.

I just started getting these bouncebacks en masse this week.
My mail provider publishes SPF records.
If the names and numbers in the bouceback messages are to be believed, 
however, the spammers have defeated SPF by hijacking DNS.  The poor 
recipients never see my SPF records because they're looking at the wrong 
IP address.