Re: return path != from

From: Bjarni R. Einarsson (
Date: Sat 20 Sep 2003 - 13:20:16 GMT

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    On 2003-09-19, 13:40:20 (-0700), Jesse Millan wrote:
    > 99.9% of spam emails return path is not the same as the sender. Why
    > doesn't anomy assign positive hits when the the return path is not the
    > same as the sender.

    a) Anomy is not an antispam tool.

    > I know _some_ legitimate email would do the same but...

    b) Lots does, the false positive rate on such a check is so high
    that it's virtually useless for classifying spam.

    This might be useful to help recognize non-spam (to offset false
    positives caused by other heuristics in anti-spam software), but
    that's a slightly different problem... and has nothing to do with

    Bjarni R. Einarsson                           PGP: 02764305, B7A3AB89                -><-    

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