hashcash spam throttle

Robert A. Costner <pooh@efga.org> writes:

It's much like spam. It's a very shortsighted view when a user says "why can't you just hit the delete button?" This is an incorrect answer for a user who received one piece of spam, but whose small ISP, being the relay, lost all mail services for two days.

See HashCash: http://www.dcs.ex.ac.uk/~aba/hashcash/ Hashcash ensures that the would be spammer has to consume more resources than you do. Hashcash is arbitrarily expensive to create and cheap to verify. It's also decentralised and anonymous. Adam