How do I unsubscribe from TestFlight beta email notifications?

I signed up for beta TestFlight notifications previously and I’m now trying to unsubscribe from these emails and having trouble. In the email, there is an unsubscribe link at the bottom, which brings up an email template (mailto:ios-beta@plex.tv?Subject=Unsubscribe).

Sending an email to this address keeps being sent back with the message below. I’m sending the email from the same address that the email is being sent to. Can someone please assist?

Delivery to the following recipient failed permanently:
ios-beta@plex.tv
Technical details of permanent failure:
Leave failed, not a member

Have you tried doing it from the TestFlight App? When you open TestFlight you can tap on the Plex app icon and if you scroll down a bit you should see a Notifications option. There you can specify how you want to be notified.

Thanks. That’ll probably do the trick, I just didn’t know it was there. Would make sense to make the unsubscribe link in the email function properly, though, or remove it altogether.