Maybe this is what's happening to me at Fidelity. They keep complaining about my email on custom domain but the Protonmail address works fine. I use different a

Maybe this is what's happening to me at Fidelity. They keep complaining about my email on custom domain but the Protonmail address works fine. I use different apps for the two because PM doesn't support IMAP, so maybe PM doesn't block the tracking pixels but the other one does.