Apple’s MPP Is Breaking Your Klaviyo Sunset Flow
Apple Mail Privacy Protection pre-fetches every image in delivered email through Apple’s proxy servers — including Klaviyo’s tracking pixel — generating an open event whether the recipient ever read the message. Apple commands 49-58% of email opens (Litmus, 2025), so any Klaviyo flow triggering on Opened Email runs on a corrupted signal. Sunset flows keep inactive iPhone subscribers alive forever; win-back flows fire on ghost opens. Filtering the Apple Privacy Open property is a diagnostic, not a fix. The real solution is feeding Klaviyo true engagement events — server-side clicks and purchases from WooCommerce via the Track API.