On Thu, 16 Jun 2005, jdow <[EMAIL PROTECTED]> wrote
From: "Chris Hastie" <[EMAIL PROTECTED]>
Thus if a piece of mail has failed all three of these tests, the
probability of
it being ham is 0.05 * 0.2 * 0.4 = 0.004, or 1/250. Or put another way, we
can
be 99.6% sure it is spam.
They got there before you did, Chris. That is how the scoring system
within SpamAssassin itself works. It is also how the scores on rules are
set - nominally.
Cool. I must admit I've never poked about in the internals of SA - I'd
just somehow got the impression that scores were summed. But then I
suppose if the scores are somehow logarithmically related to the
probability of a test picking up spam that would amount to the same
thing.
--
Chris Hastie
