Here's a summary of the messages received on one of my (three) mail servers at home:
messages 282 received 71 delivered 0 forwarded 0 deferred 0 bounced 208 rejected (74%) 0 reject warnings 0 held 0 discarded (0%)
Yes... 74% rejection rate (the average for that box is ~70%) yesterday. And of the 71 messages that were delivered, I bet at least half were still spam. I'm considering cranking up my use of the various RBL's out there, but I'm just a little paranoid about them breaking and bouncing most/all of the valid mail too. Especially with the kind of shit Verisign's been pulling recently.