Interestingly, Apple is attempting to address this issue in today's WWDC. The new iOS/iPadOS 15 will somehow "hide" your ip address when loading remote content.

Interestingly, Apple is attempting to address this issue in today's WWDC. The new iOS/iPadOS 15 will somehow "hide" your ip address when loading remote content. They didn't go into details about the implementation in keynotes, but from the presentation, I would assume it is some kind of proxy to preload links? I am not sure if I want to let Apple load my emails/messages remotely.