Many people have the habit of using iPhones or iPads to check email, and Apple has added a lot of security to the iOS 15 privacy function, among which the "Email Privacy Protection" new feature can protect email activity information and prevent email sender information from being tracked.

Apple is mainly anti-blocking email hidden pixel tracking function, usually pixel size only 1px blank image form exists, is also a common advertising business to monitor the behavior of the target recipient, can collect the target recipient device and behavior and other information, including:
✅ The number of times and times emails are turned on
✅ Whether there is forwarding behavior
✅ Click on the link in the message
✅ The recipient's device real IP location, country
✅ Client mail tool name
✅ Device screen resolution, operating system
✅ Establish user personal data profiles
How to turn on iPhone email privacy protection?
1. Open Settings and click Mail
2. Pull down to Privacy Protection
3. Protect email activity, on
After iPhone or iPad users turn on the "Email Privacy Protection" function, all remote content downloaded by emails will be transmitted through multiple proxy servers first, preventing the IP location of the sender's device from being tracked and learning behavior.