Mail::SpamTest::Bayesian would seem to be the same kind of thing that good spam filters use, i.e. Bayesian statistical analysis. 

($_='kkvvttuubbooppuuiiffssqqffssmmiibbddllffss')
 =~y~b-v~a-z~s;                             print

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In reply to Re: automate mail filter entry? by Cody Pendant
in thread automate mail filter entry? by Marza

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