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Quick Spam Filter is a small, fast spam filter that works by learning to recognise the words that are more likely to appear in spam than non-spam. It is intended to be used in a procmail recipe to mark email as being possible spam.
Homepage:
http://www.ivarch.com/programs/qsf.shtml
RPM package:
http://prdownloads.sourceforge.net/qsf/qsf-0.3.1-1.i386.rpm
freshmeat project page:
http://freshmeat.net/projects/qsf/
There is program mailstat which can process the procmail.log file and print nice summary out of it. If you generate the summary at midnight and clear the log, you get pretty nice per day/per folder traffic analysis.
mailstat -h
$ mailstat -km procm.log
Total Number Folder
0 14763 ## diagnostic messages ## 163940 108 (printf "\n\n>> " `date '+%y.%m.%d'` "\n\n"; cat -) \ | $LIN 1767094 2 (rm -f $FILE; uudecode) 48725 23 /dev/null 272248 83 /udd/s/suntong/mail/mbox
<< 2000.08.06 Sun 19:48:58