Comments for HashCash
Good idea....
and will thus require all "owned" machines to be upgraded with new spamming software than can compute these hashes. Maybe owners will wonder why their PC's are slowing down.
spam assassin 3.0
spam assassin 3.0 supports hashcash
could still really use hashcash support for mozilla mail (thunderbird/mozilla mail).
See: for the tracking bug (www.hashcash.org/mail/...) info