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Spam Bayes - Very High False Positives

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  • Spam Bayes - Very High False Positives

    I've been using SpamBayes for MS Outlook ever since PCWorld highly recommended it. Many people in MozillaZine's AfterDark section absolutely rave about Bayes. I find that it does an excellent job at catching spam, and spam never gets through to the Inbox. Ever. However, it also has a very high false-positives count. Between 40%-60% of all the mail from my site goes straight to the suspected spam bin (not to be confused with the definite spam bin). Good mail very rarely goes to the definite spam bin, but almost everything that goes to the suspected bin is good mail.

    I've trained and retrained it for good/bad mail, but this problem is constant. Has anyone else had such a problem with it and been able to fix it?
    "63,000 bugs in the code, 63,000 bugs, you get 1 whacked with a service pack, now there's 63,005 bugs in the code."
    "Before you critisize someone, walk a mile in their shoes. That way, when you critisize them, you're a mile away and you have their shoes."
    Utopia Software - Current Software: Utopia News Pro (news management system)

  • #2
    When that happens I just click "recover from spam" and it 'learns' not to add that mail any more.

    Comment


    • #3
      At the beginning I had that, particularly from emails with attachments, but now it works very well.

      Comment


      • #4
        This is my problem with these spam systems, they make false postivies. I can live with false negatives but not false postives. Cloudmark also has given very high postivies, particularly any email that is autogenerated (and someone thus can't be bothered to subscribe to).
        Christopher Padfield
        Web Based Helpdesk
        DeskPRO v3.0.3 Released - Download Demo Now!

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        • #5
          I do the recover, but I still constantly get false positives. I've been using it for quite a while, and it's been in training the whole time (well obviously..), and its still getting them. PCWorld said that after training for just about a week they got it working nigh' perfectly.

          Most emails with an attachment still go to the bin, as do most forum registration confirmation messages.

          Why does anyone send spam anyway? No one who gets spam actually buys, do they?

          :/

          Edit - My avatar looks crappy in Internet Exploiter with the crappy PNG support.
          Last edited by CeleronXT; Thu 22 Jan '04, 5:04pm.
          "63,000 bugs in the code, 63,000 bugs, you get 1 whacked with a service pack, now there's 63,005 bugs in the code."
          "Before you critisize someone, walk a mile in their shoes. That way, when you critisize them, you're a mile away and you have their shoes."
          Utopia Software - Current Software: Utopia News Pro (news management system)

          Comment


          • #6
            Install SpamAssassin, it's much better: http://www.vbulletin.com/forum/showp...6&postcount=56
            Raz - KMC Forums

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            • #7
              This is my ISP's email, so I don't have access to the server.
              "63,000 bugs in the code, 63,000 bugs, you get 1 whacked with a service pack, now there's 63,005 bugs in the code."
              "Before you critisize someone, walk a mile in their shoes. That way, when you critisize them, you're a mile away and you have their shoes."
              Utopia Software - Current Software: Utopia News Pro (news management system)

              Comment


              • #8
                I've had great success with SpamAssassin. Out of thousands and thousands of spam emails over the last couple of weeks - it catches about 98% of them, and I've only had two false positives - neither of them important.
                Steve Machol, former vBulletin Customer Support Manager (and NOT retired!)
                Change CKEditor Colors to Match Style (for 4.1.4 and above)

                Steve Machol Photography


                Mankind is the only creature smart enough to know its own history, and dumb enough to ignore it.


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                • #9
                  I don't know, Spambayes works pretty damn good for me. I get a couple "suspected" emails every day and rarely is it a false positive.

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                  • #10
                    I just installed it yesterday, and it seemed to work. 1 false positive and 5-6 correct hits with little training
                    Talk about pets and post pictures at Talk Pets!

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                    • #11
                      I just decided to try something different. I retrained it without emptying the database, and set the ordinary good folders, but set an empty folder for bad mail. Maybe this will raise percent values on good words while leaving the bad ones as-is. I'm hoping the problem is something like that. :/

                      Every one of the slashdot mailers goes to the suspected bin. I recover it every time every night, and it still goes there.
                      "63,000 bugs in the code, 63,000 bugs, you get 1 whacked with a service pack, now there's 63,005 bugs in the code."
                      "Before you critisize someone, walk a mile in their shoes. That way, when you critisize them, you're a mile away and you have their shoes."
                      Utopia Software - Current Software: Utopia News Pro (news management system)

                      Comment


                      • #12
                        Maybe it is on to something when it suspects the slashdot emails

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                        • #13
                          It didn't trash the slashdot mailer this time. Looks like it's improving a bit. Although it looks like Freddie would think this was actually a regression in performance.
                          "63,000 bugs in the code, 63,000 bugs, you get 1 whacked with a service pack, now there's 63,005 bugs in the code."
                          "Before you critisize someone, walk a mile in their shoes. That way, when you critisize them, you're a mile away and you have their shoes."
                          Utopia Software - Current Software: Utopia News Pro (news management system)

                          Comment

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