/mail-filter/
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amavis
amavisd-new
anomy-sanitizer
anubis
ask
bmf
bogofilter
bsfilter
clamassassin
dcc
disspam
dspam
gld
imapfilter
libspf2
libsrs2
maildrop
mailfilter
mapson
popfile
procmail
qmail-scanner
razor
rblcheck
scmail
spamass-milter
spamassassin-ruledujour
spamassassin
spambayes
spampd
tmda