MAIL ON THE Apple Watch does not use the new privacy features in iOS 15, a security researcher has found.
Mail Privacy Protection, introduced with much fanfare in iOS 15, hides your location, prevents tracking, and stops senders using techniques such as hidden pixels to learn when you open an email. You need to switch this feature on, but even after you have done so, it turns out it does not operate if you view emails — or just preview them — on your Apple Watch.