[ajanuary]

> I've really been hoping GMail and other clients would accept a URL in email headers that would handle unsubscribe, so they could add a button to the UI.

GMail offers to unsubscribe you if you mark something as spam and it's able to detect how to unsubscribe.

It reduces the number of buttons on the screen, which is a good thing, but I feel bad about potentially harming a companies credibility by clicking spam as a shortcut to unsubscribe if Google can't figure out how to unsubscribe.