> > On the outward side... that seems quite out of place for qpsmtpd, > > although I could understand if you're using it for relay. Seems more > > like it should be part of qmail-send or such though. > > Yep, I'm using it for relaying too. qpsmtpd seems a much better place to > do it than 10 different MUAs, though. :-)
You missed the point, I think. qpsmtpd isn't doing the actual relaying. it's likely just accepting the message and handing it off to qmail or postfix. If you wanted to do this in a relay situation (which I think the hashcash people would argue is the wrong place, even though it's easier) the place to do it is somewhere inside qmail or postfix. But you've suddenly put all the hash-work on your relay box, which isn't really where the hashcash folks intended it to be. (And when your relay box falls to its knees... your users will be unhappy.) The bigger problem with hashcash seems to be the mailing list issue, and that doesn't seem to have any satisfactory answers yet. But anyway, don't let me talk you out of implementing this. It's just my opinion that it's not worth it. -R
