> DCC seems to have a large number of _solicited_ bulk email in its > database, and my users get very upset when they sign up for junk email > and it gets marked anywhere near spam.
Of course DCC will contain solicited bulk email in the database! You *completely* misunderstand the entire purpose of DCC. Please read along with me the first few paragraphs of the documentation.
Actually, In my experience, DCC contains very little solicited bulk. It also contains much less solicited bulk mail than razor does. This is of course completely contrary to Razor's goal of not containing solicited email, and DCC's claim of not caring.
This experience is also consistent with the mass-check results in STATISTICS-set3.txt for SA 3.0. DCC has a noticably higher S/O ratio than Razor does.
4.936 10.1125 0.0301 0.997 0.79 2.17 DCC_CHECK 35.260 71.0900 1.2980 0.982 0.38 1.51 RAZOR2_CHECK
When DCC fired in this test, 99.7% of the matches were really spam. For razor, 98.2% of it's matches were really spam. Razor's total spam hit rate is MUCH higher, but it's accuracy is worse.
I'd treat the DCC and Razor design goals with a huge grain of salt compared to their real-world behaviors. Both have some FPs, but then again, so does every rule. Most of my FPs on either Razor or DCC are solicited bulk mail.
Also if most of your DCC problems are based on a particular sender, or only a few senders, you can configure DCC to not match that sender's mail using the whiteclnt file. I've not needed to do this, but it's easy to set up.
