Filter by unsubscribable emails

The Problem

I’m frustrated that I can’t think of all the possible emails of “unsubscribable emails”. The new button feature is great - thank you!!!

Proposed Solution

Add a filter that allows inboxes to filter by “unsubscribable” so that we could mass unsubscribe from everyone thats ever given you the option to.

Alternative Solutions

Maybe this is already done somewhere? some sort of advanced filtering?