[Bug 3504] New: False positive: Dynamic IP block, handled by it's own ISP

[bu...@bugzilla.spamassassin.org]

http://bugzilla.spamassassin.org/show_bug.cgi?id=3504

           Summary: False positive: Dynamic IP block, handled by it's own
                    ISP
           Product: Spamassassin
           Version: unspecified
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P5
         Component: Rules
        AssignedTo: spamassassin-dev@incubator.apache.org
        ReportedBy: bart@fastmail.fm


SpamAssassin's SORBS rules should not signal RCVD_IN_SORBS when a Dynamic IP 
Block IP (present in SORBS database) is handled by it's own ISP.

Example of false positive (2nd header IP is in Dynamic IP space):

Received: from [213.51.128.133] (port=60147 helo=smtp2.home.nl)
        by smtpq3.home.nl with esmtp (Exim 4.30)
        id 1BZ8p6-0002oV-Vk; Sat, 12 Jun 2004 15:45:28 +0200
Received: from cc300210-a.groni1.gr.home.nl ([217.121.251.58]:1955 
helo=CC300210-A)
        by smtp2.home.nl with smtp (Exim 4.30)
        id 1BZ8p3-0001nI-AU; Sat, 12 Jun 2004 15:45:25 +0200

Reference: http://www.dnsbl.us.sorbs.net/DUL-FAQ.html
... all outgoing mail from dynamic address space (and in a few cases static 
space) should be made to flow through their ISP's mailserver.



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