In my proposals is that you don't refuse mail from unknown or untrusted servers, you throttle its volume down to the volume of person to person mail. In this case, the only people who truly need to get on the trusted list (something that might take money, or at least time) are people hosting (not running, hosting) mailing lists and large sites.

I want the minimum collateral damage, and decided if I could limit the collateral damage only to people who host mailing lists and possibly big sites, I would be doing a lot better than the systems we see out there today. Some people in the anti-spam community are too rabid, unfortunately, and reject anything that lets even a tiny number of spam through.