spam
You don't know what you have until you lose it.
Apparently, there was a power failure in our house today, and my workstation's network card didn't get its driver loaded due to a configuration mishap of mine (which I fixed by now, of course). In itself, that's nothing to be stressed about, except for the fact that, in an effort to avoid my LANs mailserver to implode, I installed spamd on my workstation, and configured the server to connect to that spamd, which has considerably more CPU power (PentiumIII/650 vs PentiumI/100).
The result: I had about 50 new messages in my inbox, and only two or three of them were ham.
Perhaps I should not bother about the server's CPU power like that. Since having configured spamassassin this way, I enabled exim's load limiting features, so it shouldn't implode anymore anyway.
Hmmm...