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[anti-spam-wg] DKIM spoofing (was: RIPE 51 anti-spam WG minutes)

  • From: Walter Ian Kaye <
  • Date: Mon, 12 Dec 2005 23:33:18 -0800

At 04:16p +0000 12/07/2005, Rodney Tillotson didst inscribe upon an electronic papyrus:

C. Technical measures

DKIM Domain Keys Identified Mail

Patrik Fltstrm gave a presentation on DKIM status and technology.

Patrik Fltstrm: No, I think it is going to work!
At Cisco they notice that about 10% of messages are signed.
There are a number of DKIM-aware tools: Sun Mail, Yahoo!, Cisco,
I've been seeing faked domain key/SPF headers (what a surprise). Excerpt:

Received: from ([])
X-Gmail-Received: 2atq6t6218l0215v27be90z95a641f3r8wqu8302y6
Received-SPF: pass ( domain of xlm@localhost designates as permitted sender
List-ID: <>
Precedence: bulk
X-Mailer: PHP
X-Accept-Language: en-us, en
To: xlm@localhost
Subject: Request.
I've also seen fake Habeas headers. What good are these things if they're just going to get spoofed anyway?