Firefly Posted November 8, 2007 Share Posted November 8, 2007 I recently enabled the Spamhaus PBL list in my list of blocklists, but have found that when people use a web-mail system, such as SpamCop's own, SC incorrectly looks up the user's own IP in the PBL where it is likely to be found. For example: Return-Path: <me[at]example.com> Delivered-To: spamcop-net-My.Name[at]spamcop dot net Received: (qmail 6870 invoked from network); 8 Nov 2007 01:43:08 -0000 X-spam-Checker-Version: SpamAssassin 3.2.3 (2007-08-08) on blade2.cesmail.net X-spam-Level: *** X-spam-Status: hits=3.3 tests=ALL_TRUSTED,HTML_MESSAGE,MIME_QP_LONG_LINE, NORMAL_HTTP_TO_IP,TVD_SPACE_RATIO version=3.2.3 Received: from unknown (HELO c60.cesmail.net) (192.168.1.105) by blade2.cesmail.net with SMTP; 8 Nov 2007 01:43:08 -0000 Received: from unknown (HELO epsilon2) ([192.168.1.60]) by c60.cesmail.net with ESMTP; 07 Nov 2007 20:43:08 -0500 Received: from pool-71-181-32-168.cncdnh.fios.verizon.net (pool-71-181-32-168.cncdnh.fios.verizon.net [126.96.36.199]) by webmail.spamcop.net (Horde MIME library) with HTTP; Wed, 07 Nov 2007 20:43:08 -0500 Message-ID: <20071107204308.8njl34bq8kook448[at]webmail.spamcop.net> Date: Wed, 07 Nov 2007 20:43:08 -0500 From: My Name <me[at]example.com> To: My.Namel[at]spamcop dot net Subject: UPS MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="=_4t3dfs5ttmss" Content-Transfer-Encoding: 7bit User-Agent: Internet Messaging Program (IMP) H3 (4.1.4) X-SpamCop-Checked: 188.8.131.52 X-SpamCop-Disposition: Blocked pbl.spamhaus.org Spamhaus's description of the PBL says: Caution: Because the PBL lists normal customer IP space, do not use PBL on smarthosts or SMTP AUTH outbound servers for your own customers (or you risk blocking your own customers if their dynamic IPs are in the PBL). Do not use PBL in filters that do any â€˜deep parsingâ€™ of Received headers, or for other than checking IP addresses that hand off to your mailservers. I maintain that SpamCop is doing exactly what it shouldn't - deep parsing the headers. I have therefore disabled the PBL for my account. I'd wonder how effective it would be anyway for anyone who gets mail forwarded. Steve Link to comment Share on other sites More sharing options...
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