Prob I am also running Xeon Dual 2.4 Ghz with 1 GB Ram, esp during peak hours load would be in the 20s range with the current virus outbreaks. Is that normal? Server can still take it, just that I feel 20s range for load is extremely high
Yeah, these guys are a pain that way, specially if you have some mailing lists, and auto-responder type thingies on your box, but good thing you got a dual xeon. That helps the load a bunch. My customers want it so it is staying.
Same for me, my clients want the anti virus and so on. I notice that a lot of traffic also generated by the anti virus emailing back to to senders (for viruses a lot are spoof or non existent) this cause a lot of queue and unprocessed messages. Another headache. Clients want to be informed of any emails the failed to receive. Really want to stop the anti virus messages. Was also advised by some anti spam RBL to stop these. Still deciding, anyone stopped the anti virus messages?
I just moved our group of qmail scanning servers to ClamAV from F-Prot, I find the resource requirements about the same and it is actually SpamAssassin that takes most resources most of the time.
The only suggestion I would have is to use the clamd service so it's always ready to roll.
One server I'm taking care of for a dialup ISP is only a P2-350Mhz with 384MB of RAM, this box does incoming scanning then hands off the email to the ISPs NT mail server. It works well with the qmailscan combo, although we do use RBLs to drop about 85% of incoming connections, if we don't use RBL lookups the box buckles quite quickly under the load, those darn spammers!