Reduction in Distribution of Spam Act of 2003

Reduction in Distribution of Spam Act of 2003 - Prohibits a person from initiating in interstate commerce the transmission of any unsolicited commercial electronic (UCE) mail message unless the message contains: (1) identification as an advertisement or solicitation; (2) notice of an opt-out opportunity, along with a mechanism for doing so; and (3) a valid physical street address of the vendor. Prohibits the transmission of UCE mail: (1) after valid objection; (2) with fraudulent header information; and (3) from illegally harvested email addresses.

Provides a right of enforcement action for: (1) providers of Internet access service; (2) States on behalf of any of their residents; and (3) the Federal Trade Commission (FTC).

Amends the Federal Criminal code to provide criminal penalties for: (1) falsifying the identify of an UCE mail sender; (2) failing to place warning labels on UCE mail containing sexually oriented material; (3) bulk email violations and repeat offenses; and (4) illegal harvesting of email addresses. Provides for enforcement of such penalties through actions by Internet service providers, the Attorney General, and State attorneys general.

Requires the FTC to issue regulations to implement this Act. Requires the FTC and the Federal Communications Commission to report to Congress: (1) regarding the need to protect the rights of users of email to avoid receiving unwanted commercial email; and (2) a detailed analysis of the effectiveness and enforcement of the provisions of this Act.