AOL and Yahoo put price on e-mail

"Companies will soon have to buy the electronic equivalent of a postage stamp if they want to be certain that their e-mail will be delivered to many of their customers. America Online and Yahoo, two of the world's largest providers of e-mail accounts, are about to start using a system that gives preferential treatment to messages from companies that pay from 1/4 of a cent to a penny each to have them delivered. The senders must promise to contact only people who have agreed to receive their messages, or risk being blocked entirely."