Open relays are usually run either by people who don't know they're helping spammers or they don't care. But when their mail server starts crashing because there's no disk space left or it slows to a crawl because there are no file handles left, they'll either take notice and close their open relay, or their machine will be so slow it won't really be able to spam much.
Except, there's already a good solution for the open relay problem - isn't this what things like ORDB are for?
Yes, this could bring additional pain to bear upon them and that's a Good Thing, but it seems like we should be able to accomplish more with this. Let me think about it, and bounce it off of a couple of TCP wizards...
