For the last few weeks I have been getting spam which comes through with no “To:” field at all. I have never seen this kind of junk mail before. How do I stop it getting through. SpamSieve is not doing its job. Here is an example:
From: zidaxffwkb@compuserve.net
Subject: 822263 SatisfiedCustomers-GotTheir-MedsAt-80%0ff
Date: February 7, 2008 12:27:56 PM CST
Received: from imta11.emeryville.ca.mail.comcast.net ([76.96.30.22]) by sccrmxc13.comcast.net (sccrmxc13) with ESMTP id <20080207182756s1300ingdhe>; Thu, 7 Feb 2008 18:27:56 +0000
Received: from compuserve.net ([190.29.25.68]) by IMTA11.emeryville.ca.mail.comcast.net with comcast id miRn1Y00n1U9LBi0B00U00; Thu, 07 Feb 2008 18:27:56 +0000
X-Originating-Ip: [76.96.30.22]
X-Authority-Analysis: v=1.0 c=1 a=jBJGUoHxAAAA:8 a=PUVxLw58I6RMx6AI34oA:9 a=JrTmDF60qOx2C5DN5JgA:7 a=bSaaP-TZ8TQxnAi6BxGBCtNcm28A:4 a=OTLULdaup-wA:10 a=37WNUvjkh6kA:10
Mime-Version: 1.0
Content-Type: text/html; format=flowed
Message-Id: <577424072531073051013177@compuserve.net>
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First, you should check SpamSieve’s log to make sure that the problem is with SpamSieve. If it’s not, no amount of training or tweaking will make any difference.
Second, you can block messages with no To address by creating a blocklist rule (Filter > Add Rule) that matches <SpamSieve-Unknown-To> in the To field.