Email opt-out is the process that allows recipients to unsubscribe from marketing emails, ensuring compliance with regulations like GDPR and the CAN-SPAM Act. Businesses must provide a clear and easy-to-use opt-out option, typically through an unsubscribe link in email footers. Proper email opt-out management helps maintain sender reputation, improve engagement rates, and build trust with recipients. Some brands implement preference centers, allowing users to customize the types of emails they receive instead of fully opting out. Failing to honor opt-out requests can lead to spam complaints, penalties, and blacklisting by email providers. A transparent opt-out process ultimately improves customer experience and ensures ethical email marketing practices.