http://issues.apache.org/SpamAssassin/show_bug.cgi?id=5555

           Summary: Add DKIM tests to VBounce-BackScatter-Detection
           Product: Spamassassin
           Version: SVN Trunk (Latest Devel Version)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P5
         Component: Plugins
        AssignedTo: [email protected]
        ReportedBy: [EMAIL PROTECTED]


The attached patch adds DKIM checks to the backscatter detection in the VBounce 
plugin, in addition to 
using the existing content heuristics.

The idea is that if a site uses DKIM to sign outgoing messages, these 
signatures should be contained in 
incoming bounces (if the bounces contain a copy of the original message, or at 
least its headers). 
Additionaly, one can specify additional headers to check for - if a bounce 
message does not contain the 
header, it might be backscatter (e.g. "X-MyAntiBackScatterHeader").



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