http://www3.telus.net/public/bissett1/PMMBogoFilter.html
This is a set of REXX scripts to allow PMMail to use BogoFilter, a Bayesian SPAM filter program. BogoFilter version 0.15.3.2 has also been released (2/1/2004)
http://hobbes.nmsu.edu/cgi-bin/h-search?key=bogofilt
Source: OS/2 News and Rumors