Making the spammers pay

ah I dont think it will go through, how would you be able to differentiate between unsolicited spam and a email that just happens to be from someone you dont know yet like say I dont really know you edesignuk but if you asked a question on the board and I decided to send you an email about it should I have to pay just because Im not on your address book? plus you get lots a spam in your postal mailbox still and the companies have to pay for the postage right and yet they still send it, if it happens it may clear up a lot of completely pointless spam but the stuff from actual companies will never stop.