Apple Mail Privacy Protection (MPP) significantly disrupts email tracking by pre-loading emails, leading to inflated and unreliable open rates. This pre-loading masks IP addresses and limits device-specific data, hindering location-based targeting. While MPP affects open rates, click tracking remains largely unaffected. Categorizing MPP-driven opens is complex, as they are server-side fetches, not device-specific interactions. To mitigate these impacts, email marketers are advised to shift focus from open rates to engagement metrics like clicks, conversions, and website traffic. Emphasizing subscriber-centric data, enhancing data privacy, and utilizing preference centers and progressive profiling are crucial for future-proofing email marketing strategies in the post-MPP landscape.