http://issues.apache.org/SpamAssassin/show_bug.cgi?id=5652

           Summary: bayes_seen - auto expire
           Product: Spamassassin
           Version: unspecified
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P5
         Component: Learner
        AssignedTo: [email protected]
        ReportedBy: [EMAIL PROTECTED]


bayes_seen db grows without any purge cycle, even if previously learned tokens 
have long been expired for the main bayes db.  Users non-sa saavy often 
complain of over sized seen db file sizes, at times from 250mb-4GB in size.

Request for a new process and variable to control the seen db size... perhaps:

Bayes_Unlearn_Threshold_days

Where a user could enter a value for how many days to keep the seen DB tokens 
and expire those older than that threshold.  Perhaps a DEFAULT value of 7 days 
would be in order as most spam campains last a single day at most.  A 30 day 
purge should be more than safe for most anyone and bets a non-expiry system.



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