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[ excerpt from developer's site ]
SpamOracle, a.k.a. "Saint Peter", is a tool to help detect and
filter away "spam" (unsolicited commercial e-mail). It proceeds
by statistical analysis of the words that appear in the e-mail,
comparing the frequencies of words with those found in a user-provided
corpus of known spam and known legitimate e-mail. The classification
algorithm is based on Bayes' formula, and is described in Paul
Graham's paper, A plan for spam.
This program is designed to work in conjunction with procmail. The
result of the analysis is output as an additional message header
X-Spam:, followed by yes, no or unknown, plus additional details.
A procmail rule can then test this X-Spam: header and deliver the
e-mail to the appropriate mailbox.
WWW: http://cristal.inria.fr/~xleroy/software.html
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