In June 2021, Apple announced its Mail Privacy Protection (MPP) for the Apple Mail app at the Worldwide Developers Conference (WWDC) as a part of its iOS 15 software update, a broader update that triggered nervous hand-wringing from marketers over-reliant on audience tracking.
To bolster Apple’s privacy measures, MPP aimed to restrict email senders from knowing whether a user has opened an email. Further, it blocks the IP addresses so that senders can’t determine the user’s location or link that action to their online activities.
Apple

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