This is SylFilter, a generic message filter library and command-line tools.
SylFilter provides a bayesian filter which is very popular as a spam filtering
algorithm. SylFilter is also internationalized and can be applied to any
languages.

SylFilter library provides simple but powerful C APIs and can be used from C
programs.

SylFilter command-line tool can be used as a junk filter program like major
tools such as bogofilter and bsfilter etc