Let’s say, you’ve set up the list-unsubscribe header to you email campaign. Check out whether it works by sending an email to a test inbox. For Gmail, you’ll see the unsubscribe option in the header right next to the sender name

Now I just have to figure out why Gmail isn’t showing the Unsubscribe option like everyone says it should.

Most mailing list providers will encourage you to insert a mailto and URL within the header of your emails, or they will be automatically provided.

List-Unsubscribe-Post: List-Unsubscribe=One-Click List-Unsubscribe: <https://solarmora.com/unsubscribe/example>