Opt-out mechanisms allow users to unsubscribe from email lists. This is crucial for maintaining user trust and compliance with laws like the CAN-SPAM Act and GDPR. Opt-out can be implemented in different ways:
Unsubscribe Link: A link included in every email allowing users to easily remove themselves from the list. Email Reply: Users can reply to the email with a keyword like "unsubscribe" to be removed from the list.