List-Unsubscribe Header Unsubscribe

A List-Unsubscribe header is included with all commercial sends and supports the one-click unsubscribe method. An email client uses the header and DKIM signature included with authenticated domains to display a uniform unsubscribe link in its interface. The header helps subscribers easily unsubscribe from unwanted emails. Inbox service providers choose if, where, and how the unsubscribe link appears.

Email client unsubscribe requests are processed in these ways:

• Mail To: The Mail To method sends an email to the mail-to address included in the List-Unsubscribe header. Marketing Cloud Engagement receives these emails and unsubscribes the subscriber from the associated list in the same way that Reply Mail Management processes unsubscribe requests from links in the body of an email.
• One-Click Post: The one-click method performs the List Unsubscribe action for the subscriber as if the user clicked the Publication List Update button on the Subscription Center page. This action returns the email client’s default confirmation page to the subscriber instead of the Engagement confirmation page.
  

  Note Because Request for Comments (RFC) 8058 regulations for one-click unsubscribe require acceptance of POST requests, our List-Unsubscribe headers can’t be disabled or altered. Directing one-click unsubscribes to landing pages deviates from RFC 8058 regulations and isn’t supported.

Note If you track unsubscribe events using Data Views or Data Extracts, you can’t differentiate unsubscribes from email clients and unsubscribe requests made by subscribers on the Subscription page.