Most messages on this list have a List-Id header which I am using in filt= ers.=20 An exception is any mail sent from Matt Behrens, which is also missing th= e=20 headers: List-Archive, List-Post, X-Mailman-Version, X-BeenThere, Sender,= =20 X-Spam-Level, and X-Spam-Status. Is anyone else seeing the same thing?