Apple Mail Privacy Protection

Apple Mail Privacy Protection is a setting in Apple Mail that routes message content through Apple's proxy and pre-fetches images, so the sender cannot tell whether the recipient actually opened the message or see their real IP address. Since a large share of consumer mail is read in Apple Mail, it inflates open rates and breaks open-based automations and send-time optimisation. Move success measures to clicks, site visits and orders, and rebuild engagement segments on behaviour Apple does not simulate.