https://issues.apache.org/SpamAssassin/show_bug.cgi?id=6744

             Bug #: 6744
           Summary: FREEMAIL_REPLYTO False Positives
           Product: Spamassassin
           Version: SVN Trunk (Latest Devel Version)
          Platform: PC
        OS/Version: Windows 7
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Rules
        AssignedTo: [email protected]
        ReportedBy: [email protected]
    Classification: Unclassified


Created attachment 5028
  --> https://issues.apache.org/SpamAssassin/attachment.cgi?id=5028
Example email that shows the FP

I noticed an email was hammered by the FREEMAIL_REPLYTO.

The reason it was hammered is because in the body of the email from a
quotation.  I've put together a test case email showing the issue.

1 - I think this rule needs to be lowered to 1.0~ instead of 2.775 (for net
tests)

The S/O is 0.73.

http://ruleqa.spamassassin.org/?daterev=20111228-r1225143-n&rule=FREEMAIL_REPLYTO+&srcpath=&g=Change

MSECS        SPAM%        HAM%        S/O        RANK        SCORE        NAME 
      WHO/AGE   
0     0.9331 2011 of 215512 messages     0.0346 66 of 190519 messages     0.964
    0.73     3.26     FREEMAIL_REPLYTO     


2 - I wonder if this rule can be split into TWO rules. Right now, it is:

Reply-To/From or Reply-To/body contain different freemails

Doing the reply-to/body as a separate rule would likely be better on FPs.


3 - The S/O on FREEMAIL_ENVFROM_END_DIGIT worries me as well that the rule
should be lowered as well:

MSECS        SPAM%        HAM%        S/O        RANK        SCORE        NAME 
      WHO/AGE   
0     0.6946 1497 of 215512 messages     0.6089 1160 of 190519 messages    
0.533     0.47     0.10     FREEMAIL_ENVFROM_END_DIGIT

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