Apple Mail Privacy Protection and Open Rates: Measure What Matters

Since 2021 Apple Mail Privacy Protection (MPP) can load images, including the tracking pixel, for users who turn it on, whether or not the person opened the email. The result: inflated and unreliable open rates.

What changed

• Opens from Apple Mail users can be counted without a human reading.
• Open time and location data became unreliable for those users.
• Open-based automations can trigger on false opens.

Metrics that still work

• Clicks and click-to-open on links you can attribute to a person
• Replies and conversions
• Delivered, bounce and complaint rates
• Unsubscribes

How to adjust

1. Treat open rate as a rough trend, not a precise number.
2. Segment by engagement using clicks and conversions.
3. Review automations that rely on opens as a trigger.
4. A/B test on clicks or revenue, not opens.

Keep the list real

False opens hide dead addresses: a bounced or abandoned mailbox cannot open anything, but a prefetched one can look active. Verification shows which addresses can receive mail at all. Check yours with the bulk verifier.