This is using Exchange 2003 sp2. Recently, I've started to use IMF. I set the value for SCL greater than or equal to 7, to be ARCHIVED; and 6 to be store into the junkmail. And of course, I tick the Intelligence Message filtering in Default virtual smtp server, and then restarted the SMTP Service.
Any other suggestions to make the antispam work to eliminate let's say up to 80% accuracy. Or else, what other antispam software should I try?