Most of my mail is delivered by smtp directly to me, but my secondary max records cause some mail to be delivered to a POP3 mailbox- this is then retrieved using spamassasin.

Having been running spamassassin at home with great success for some time, I have just set it up at work but had a few problems setting up a new Debian Linux box for this from scratch.

I found that spam was just not being detected nearly as well as at home, and the machine was struggling with the load (load average around 3).