RPOW - Reusable Proofs of Work
Hal Finney
hal at finney.org
Fri Aug 20 17:09:24 EDT 2004
Matt Crawford writes:
> If you think of POW as a possible SPAM mitigation, how does the first
> receiving MTA assure the next MTA in line that a message was "paid
> for?" Certainly the mail relay doesn't want to do new work, but the
> second MTA doesn't know that the first isn't a spambot.
The first MTA would exchange the received RPOW for a new one of equal
value, and pass it along with the message to the next MTA in line.
Hal
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