From: "Eric Dean" <eric(_at_)purespeed(_dot_)com>
Well, I use a CR system and am subscribed to various mailing lists. We use
the Sender header to exempt challenges.
...
How does that operate? What Sender values garner exceptions, and why
won't more spammers use them if there are any? Or by "exception,"
do you mean that the mail is immediately discarded unchallenged?
About 5% of the last 29,319 spam caught in my traps have Sender headers.
Some of the streams of spam follow all of the forms that I know of
for a mailing list. Here is a sample from a stream that you should
recognize, since it's from the hard working entity that sometimes
calls itself "Drew Lanzetta":
From: Spec Sheet <ssha(_at_)all(_dot_)at>
To: vj(_at_)calcite(_dot_)rhyolite(_dot_)com
Subject: Stockgroup Signs Licensing Agreement with Time Warner
Date: Mon, 12 May 2003 13:56:33 -0700
MIME-Version: 1.0
Content-Type: text/html
List-Unsubscribe:
<mailto:leave-specsheet-html-a-634245P(_at_)financepages(_dot_)com>
List-Subscribe:
<mailto:subscribe-specsheet-html-a(_at_)financepages(_dot_)com>
List-Owner: <mailto:owner-specsheet-html-a(_at_)financepages(_dot_)com>
X-List-Host: Main site
Reply-To: ssha(_at_)all(_dot_)at
Sender: bounce-specsheet-html-a-634245(_at_)financepages(_dot_)com
Message-Id:
<LYRIS-634245-31612-2003(_dot_)05(_dot_)12-13(_dot_)56(_dot_)34--vj#calcite(_dot_)rhyolite(_dot_)com(_at_)fin
ancepages.com>
MIME-Version: 1.0
Content-Type: text/html
Note that those headers are exactly as they appeared on the wire before
my MTA did anything to them, including adding a Received: header.
Well, "Drew Lanzetta" doesn't include List-ID header, and I don't see
any recent spam in my traps that does.
However, there is plenty in NANAS. See
http://groups.google.com/groups?q=+%22list-id%22+group%3A*abuse.sightings
Vernon Schryver vjs(_at_)rhyolite(_dot_)com
_______________________________________________
Asrg mailing list
Asrg(_at_)ietf(_dot_)org
https://www1.ietf.org/mailman/listinfo/asrg