We currently send and receive about 40,000 to 50,000 e-mails daily. The processes that are taking up the most CPU are multiple instances of declude.exe and NTVDM.exe.
NTVDM.exe is used for 16-bit processes, and can indeed cause some servers to slow down to a crawl. Are you using F-Prot.exe with Declude Virus? If so, you should switch to the 32-bit fpcmd.exe version.
We tried to comment out some of our SPAM test to see if it would help and it has freed up some CPU. The SPAM test that were commented out were the ones provided by mailpure.com (Gibberish, Y!directed, etc). Are these tests really worth having to test for SPAM or can they be removed?
Any filter with many BODY filters in it can be very CPU intensive. If you don't have much CPU power to spare, you may want to weigh the benefits of the filters versus the CPU usage.
-Scott
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