I think this is the story you're talking about: https://www.wired.com/story/how-email-open-tracking-quietly-took-over-the-web/ https://www.wired.com/story/how-e

I think this is the story you're talking about: https://www.wired.com/story/how-email-open-tracking-quietly-took-over-the-web/ https://www.wired.com/story/how-email-open-tracking-quietly-.... But it's pretty flimsy evidence. Undoubtedly Tim Cook has somebody, or more likely several somebodies handling his (external) email.