When emails are no longer relevant or important to a contact, they can unsubscribe to cancel their subscription to the list or service. In many countries, the law requires all emails sent to a mailing list to include an unsubscribe button or a similar functionality.

When emails are no longer relevant or important to a contact, they can unsubscribe to cancel their subscription to the list or service. In many countries, the law requires all emails sent to a mailing list to include an unsubscribe button or a similar functionality.