The law in the US is the CAN-SPAM act in 2003. It requires email to have unsubscribe instructions at the bottom of the email and to take people off the list wit

The law in the US is the CAN-SPAM act in 2003. It requires email to have unsubscribe instructions at the bottom of the email and to take people off the list within 10 days of a request. There are similar laws, many of them stricter, in different jurisdictions. https://www.ftc.gov/tips-advice/business-center/guidance/can-spam-act-compliance-guide-business https://www.ftc.gov/tips-advice/business-center/guidance/can...