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.