Last night I decided it was time to upgrade my installation of qpsmtpd on my home machine so that I could use the new poll() based server and get better stats and logging out of the server.
Up until then I knew I got a lot of spam, but never really knew how much mail I was turning away. The multiplexing qpsmtpd includes a config server and stats plugin that allows me to see how much mail I'm rejecting in real time.
So I restarted it some time this morning, and here's the current stats:
Uptime: 22228.91 sec Mails Received: 42 5xx: 3501 4xx: 183(Mails Received is those that actually get past the spam filtering). So I've turned away nearly 4000 mails since this morning. And that's for two users on that domain. Yikes.