The CAN-SPAM Act is a federal law that sets the rules for commercial email, establishes requirements for commercial messages, gives recipients the right to have you stop emailing them, and spells out tough penalties for violations1. The main purpose of the act is to protect consumers from unwanted and deceptive email messages and to give them more control over their online privacy2. The act applies to all commercial messages, which are defined as "any electronic mail message the primary purpose of which is the commercial advertisement or promotion of a commercial product or service"1. The act does not apply to transactional or relationship messages, which are messages that facilitate an agreed-upon transaction or update a customer about an existing business relationship1. The act also does not apply to non-commercial messages, such as political or charitable solicitations3. References: 1: CAN-SPAM Act: A Compliance Guide for Business2: What is the CAN-SPAM Act? | Proton3: What is the CAN-SPAM Act? | Cloudflare