Legal requirements for the right to opt out vary by jurisdiction, but generally include the following:
Easy Access: The opt-out process must be easy to access and use. The unsubscribe link should be clearly visible and not hidden in the email's content. Prompt Processing: Opt-out requests must be processed promptly. For example, the CAN-SPAM Act requires that opt-out requests be honored within 10 business days. No Fees: Recipients should not be charged any fees for opting out of email communications. No Further Emails: Once a recipient has opted out, the sender must not send any further emails to that address, except for transactional or relationship purposes.