The arrival of Apple Mail Privacy Protection in September 2021 will affect the reliability of your open rate. In this article we will discuss the impact of this development and give you concrete tips to prepare yourself. The success of an email or email Whatsapp Number List campaign is currently measured by the number of opens, clicks and conversions. The open rate is even the most important KPI for email marketers, according to a recent study by the DDMA E-mail Committee . The open pixel in your email provides valuable data. This way you know exactly if and when your e-mail was opened. An open pixel is a tiny, one-pixel image that is not visible in the email, but it measures whether an email has been opened and returns information about which browser, operating system and IP address was used to open it. Protect your email Whatsapp Number List activity Apple recently announced 'Mail Privacy Protection' , which will launch in September as part of iOS 15, iPadOS 15 & macOS Monterey. After updating the operating system to this version, probably every Apple user will be asked whether they want to protect their personal email activity or not. It is also possible that Apple even turns this option on by default for current users. Does a user choose 'protect'? Then Apple first loads the content of the e-mail on its own server, after which the e-mail appears in the inbox of the recipient. This Whatsapp Number List means that all images, including your open pixel, will be downloaded by Apple at the time your ESP delivers the email. The result: the open rate is no longer reliable. And that's just one of the statistics that email marketers like to look at. All users who have