Hello @MarkW1082 ,
If the contact is using an iOS version that has this implementation, then it can affect other email apps.
Unless the Android user is using Apple's mail app or managed to get iOS on their Android somehow, this wouldn't apply to Android users.
This is only going to be skewed for iPhone users.
Please see the linked article, or check with Apple's support if you have further questions on how their privacy policies may affect open / click tracking functionalities for emails.
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