After installation, as spamassassin source does NOT include rules anymore, you
have to run "sa-update" script then restart "/etc/rc.d/rc.spamd", in order to
retrieve updated rules, *BEFORE* using spamassassin or spamc for the first time.
Rules will be installed in a sub-directory of /var/lib/spamassassin/<version>/
directory: don't manually move them!

Upstream developers recommend rules to be kept up-to-date regularly.
A really minimal cron script is provided in /etc/cron.weekly/ to dynamically 
check, download and install new rules every week. If you need a different
periodicity you can move the cron script accordingly.

