What is a one-click unsubscribe (RFC 8058)?
One click unsubscribe allows recipients to unsubscribe instantly without visiting a confirmation page. The unsubscribe action is triggered automatically when the link is clicked.
It provides a fast and frictionless exit as defined in RFC 8058.
It reduces complaints because frustrated users can leave cleanly.
It is implemented using both the List-Unsubscribe and List-Unsubscribe-Post headers.
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