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SpamAssassin is a highly effiicient opensource spam filtering software for UNIX. One way of using SA is to configure procmail to call spamassassin directly while pulling down mail with a tool like [fetchmail]. In FreeBSD, you could setup SA as below.
[buffy] ~> sudo portinstall mail-p5-Mail-SpamAssassin
[buffy] ~> cat /var/db/ports/p5-Mail-SpamAssassin/options # This file is auto-generated by 'make config'. # No user-servicable parts inside! # Options for p5-Mail-SpamAssassin-3.0.4 _OPTIONS_READ=p5-Mail-SpamAssassin-3.0.4 WITH_AS_ROOT=true WITH_SSL=true WITHOUT_MYSQL=true WITHOUT_PGSQL=true WITH_RAZOR=true WITH_SPF_QUERY=true WITH_TOOLS=true
[buffy] ~> grep SpamAssassin /usr/local/etc/pkgtools.conf 'mail/p5-Mail-SpamAssassin' => 'WITH_SPF_QUERY=yes WITH_TOOLS=yes',
See portupgrade
[buffy] ~> grep spam /etc/rc.conf.local spamd_enable="YES"
[buffy] ~> sudo /usr/local/etc/rc.d/sa-spamd.sh start
[buffy] ~> ps ax|grep spamd 56658 ?? Ss 0:00.64 /usr/local/bin/spamd -c -d -r /var/run/spamd/spamd.pid (perl5.8.6) 56837 ?? S 0:08.46 spamd child (perl5.8.6) 56838 ?? S 0:07.50 spamd child (perl5.8.6) 56839 ?? S 2:32.61 spamd child (perl5.8.6) 56840 ?? S 2:30.63 spamd child (perl5.8.6) 56841 ?? S 5:50.84 spamd child (perl5.8.6)
There are two ways to call SpamAssassin - /usr/local/bin/spamassassin or via /usr/local/bin/spamc.
spamc is the client for spamd (which we started earlier). If you dont have spamd running, then call spamassassin direclty. I prefer to use spamd for effciency reasons as I deal with a large volume of mail.
# use the spamassassin client :0fw: spamassassin.lock | /usr/local/bin/spamc
:0 * ^X-Spam-Flag: YES .spam/
See procmail and spamassassin
See Mutt