Jeremy W. wrote:
Maurits wrote:Because email should continue to be free.


I don't really know.  It's basically a gut feeling.  I've come up with arguments for it but none of them really convince me.
Snail mail is pay-per-envelope, certainly.  But you pay the postal service, not the addressee - and you certainly don't pay whatever the addressee decides is fair.
Consider mailing lists.  They send out to lotsa people, who sign up.  I suppose they could just refuse to let you subscribe a sender-pays email address.
I suppose a top-level domain could be created for these kinds of email addresses to avoid confusion - something like .pay-to-send, for example.  But I wouldn't want to send to anyone with such an email address.