Attempting to see how spamassassin would score a message I tried spamassassin < lottery.msg
[32179] warn: config: could not find site rules directory check: no loaded plugin implements 'check_main': cannot scan! at/usr/lib/perl5/vendor_perl/5.8.8/Mail/SpamAssassin/PerMsgStatus.pm line 164.
message can be found at http://real-world-systems.com/mail/lottery.msg