decoder wrote: > Mailing lists dont stamp anything. Read the hashcash FAQ part about > mailing lists.
Ok; you're right. Apologies for not reading up on it better. Reading through the whole FAQ, though, it still leaves me with the impression of being far less than ideal. Which is not to say that any solution is perfect. But it seems to have little utility in stopping spam from getting to my inbox. It might stem the tide, but it doesn't help detection any, since it's entirely possible for spam to have a valid hashcash header. In fact, if a valid hashcash header is used to fast-track mail around the more rigorous tests (as the FAQ seems to suggest it should[1]) that actually sounds like a win for spammers to me. Sure, the volume they can send is lower, but now the mails they send are trusted that much *more*. On top of that, it adds another client-side step to signing up for a mailing list, one that's going to be different for every mail client, and I personally have no fondness for a solution that requires the recipient to do anything like that. There are users who barely understand folders in their inbox, let alone rules and filters. Is my understanding wrong? I hope there's just something else I'm not understanding. [1] "Your mail has a form of postage on it -- the hashcash stamp -- and sails through anti-spam check-points."