OK, lets say we make emails free, unmetered, but they _must_ include a valid token for 0c. (OK Dimitri?)
Next we choose a threshold say 1000 posts per day. Seems hard to imagine anyone generating manually over 1000 emails per day. That's more than 1 per minute for a 10 hour day.
Next when you sign up for this new email postage system, you have to hand over a $100 deposit. The 0c payments are anonymous. But if you spend over 1000 of them in one day, your identity becomes known (via a mechanism like that used for Chaum's off-line double spending detection protocol). You loose $100. To you, the spammer, the
aba@dcs.ex.ac.uk wrote: posts
cost 10c each. Your account is disabled until you pay another $100.
How would this work. The ISP is enforcing these rules? But the email is not anonymous to the ISP. Or is the email going through a remailer. Why not just have an ISP say you can't send more than 1000 emails a day. But then what stops other ISPs from using different rules to get the business of spammers. -- Bubba Pettigrew