yep, as you probably know the proof of work idea came from Hashcash which was designed as a spam filtering system. I guess we've all just got locked in to email

yep, as you probably know the proof of work idea came from Hashcash which was designed as a spam filtering system. I guess we've all just got locked in to email as it is. Looks like Spam assassin supports it, I wonder if mutt can be configured to support it.