Delivering the mail is one of the few Constitutional requirements of the Federal government.
does that give the feds the right to control e-mail?
/s
February 20, 1792, President Washington formally created the U.S. Postal Service with the signing of the Postal Service Act, which outlined in detail Congressional power to establish official mail routes. The act allowed for newspapers to be included in mail deliveries and made it illegal for postal officials to open anyone’s mail.