The CAN-SPAM Act lists the guidelines, requirements, and penalties regarding the sending of commercial bulk email.
The CAN-SPAM Act of 2003 lists the guidelines, requirements, and potential penalties for noncompliance regarding the commercial use of email and the legal rights of recipients of commercial email. CAN-SPAM provides several requirements for commercial senders including, but not limited to:
This is by no means a complete description of CAN-SPAM, please visit the CAN-SPAM Act Compliance Guide for more information.
The guidelines laid out in CAN-SPAM represent the "bare-minimum" regarding sending practices. Following these guidelines does not guarantee delivery to your recipients' inboxes: CAN-SPAM leaves a considerable amount of room for improvement. Please visit SendGrid Deliverability Tips and Tricks for a more detailed discussion of how you can improve your sending practices.
CAN-SPAM is not limited to bulk email. Any commercial email communication, including business-to-business and business-to-customer email, is covered by the CAN-SPAM Act.