Original reporter: Yuriy Rusko (aka Marshalrusty)
Repository: feature/unsubscribe
I have begun work on this in my forked copy on branch feature/unsubscribe.There is currently no way to unsubscribe from a phpBB board's emails without first logging in. Whenever an old topic on a board gets bumped and/or becomes active again, there will likely be a number of users who no longer care about the site (and don't remember their credentials) and yet receive notification emails. To unsubscribe, they have to login, which means resetting their password.
Use case:
User receives topic or forum subscribed emails. In footer of email, two links are present: one to unsubscribe from topic/forum, one for unsubscribing from all. Clicking on the link will take to confirm page (confirm_box() ?) and on approval, they are removed from subscription(s).
Because UCP requires login for usage, this would be best in memberlist, imo, because permissions can be bypassed for this specific case, as they are for the 'email' case.