I may have to create an OK list, and block all others if that's what it takes. Basically only accept mail from people in my address book. Now there's an idea.

Earthlink already has this feature in their SpamBlocker service. Since I enabled it, not a single piece of spam has made it into my inbox. It blocks messages from known spammers. Earthlink keeps a running two week total of the blocked messages. The current total is 472 blocked messages, with the high being about 51 messages a day. I've seen the count as low as 300 and as high as 600+ for a two week period.

Emails from people who aren't in my address book are saved to a "suspect email" folder. I go there using Internet Mail every day or so to see if someone mailed me something legitimate. If so, I can add them to my address book so future messages get through. Probably 90+% of the suspect messages are spam, so I report them. This helps update the known spammer list.