The Controlling the Assault of Non-Solicited Pornography and Marketing Act (CAN-SPAM) of 2003 is a federal law regulating the use of unsolicited emails for marketing purposes and providing causes of action against violators.
Such emails are generally prohibited by CAN-SPAM unless they contain correct header information, a physical address for the mailer, and an opt-out mechanism for recipients. Legal liability in connection with CAN-SPAM violations is ordinarily excluded under standard general liability policies.