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+Bogofilter is a mail filter that classifies mail as spam or ham
+(non-spam) by a statistical analysis of the message's header and
+content (body). The program is able to learn from the user's
+classifications and corrections.
+
+The statistical technique is known as the Bayesian technique and
+its use for spam was first described by Paul Graham in his article
+A Plan For Spam. Gary Robinson, in his weblog Rants, suggests some
+refinements for improved discrimination between spam and ham.
+Bogofilter's primary algorithm uses the f(w) parameter and the
+Fisher inverse chi-square technique that he describes.
+
+Bogofilter is run by an MDA script to classify an incoming message
+as spam or ham (using wordlists stored by BerkeleyDB). Bogofilter
+provides processing for plain text and html. It supports multi-part
+mime message with decoding of base64, quoted-printable, and
+uuencoded text and ignores attachments, such as images.
+
+Bogofilter is written in C. Supported platforms: Linux, FreeBSD,
+Solaris, OS X, HP-UX, AIX, ...