U.S. President George W. Bush signed a bill into law Tuesday establishing federal rules for commercial e-mail and penalties for sending unsolicited mass spam e-mails. “Known as the CAN-SPAM Act, the Controlling the Assault of Non-Solicited Pornography and Marketing Act of 2003 takes effect Jan. 1,” reports InfoWorld. “The law prohibits the use of false header information in bulk commercial e-mail and requires unsolicited messages to include opt-out instructions. Penalties for violations include fines of up to US$250 per e-mail, capped at up to $6 million.”