CAN-SPAM (Controlling the Assault of Non-Solicited Pornography And Marketing Act) is a U.S. federal law established in 2003 that sets the rules and requirements for commercial email, including marketing messages, to protect consumers from unsolicited and misleading emails. Key provisions of CAN-SPAM include:

1. Consent: Emails must not be sent to recipients without their permission.
2. Transparency: The email’s subject line must accurately reflect its content, and the sender’s identity, including the physical postal address, must be clearly indicated.
3. Opt-Out Mechanism: Every email must include a clear and conspicuous way for recipients to opt out of receiving future emails, and opt-out requests must be honored promptly within 10 business days.
4. Content Requirements: Commercial emails must include a clear identification that the message is an advertisement or solicitation, unless the recipient has given prior consent to receive such emails.
5. No Deceptive Information: The “From,” “To,” and routing information, including the originating domain name and email address, must be accurate and identify the person or business who initiated the message.

Compliance with CAN-SPAM is mandatory for all businesses engaged in email marketing to avoid legal penalties, maintain consumer trust, and promote ethical marketing practices.