New anti-spam mechanisms (a.k.a. the antispam component of "delphijmail" 3.0) deployed on beastie.frontfree.net
For those who is interested, I have deployed the stuff after 3 months' test.
The major difference between traditional Frontfree Mail System and this is:
Make use of DNS stuff more and more. DNSBL act as a factor, not a determintic role. This will lead to better accurancy.
Make use of Razor(TM) distributed spam database.
No deploy plan of delphijmail 3.0 on beastie. The architecture difference made this impractical.