Where to find it: in Gmail, Settings, See all settings, General, Images; on iPhone, Settings, Mail (or Settings, Apps, Mail on newer versions), Privacy Protection; on a Mac, Mail, Settings, Privacy. In Outlook, check the setting for downloading pictures automatically.
Blocking images does not stop link tracking: if you click a tracked link, the click can still be recorded. Gmail’s image proxy hides your network address but can still show the sender that the image was loaded.
If you use the HawkOpen extension in Gmail, Outlook on the web or Yahoo Mail, it also replaces likely tracking pixels it finds in the emails you receive and removes common marketing parameters from links; it cannot guarantee that an image was not already requested before it acted.
Where rules that require consent apply, tracking may start only after that consent has been obtained. The link in the message lets the recipient withdraw consent later.
Sources
- https://proton.me/blog/pixel-tracking
- https://support.apple.com/guide/iphone/use-mail-privacy-protection-iphf084865c7/ios
- https://www.getmailbird.com/pl/jak-sledzenie-email-wykorzystuje-ladowanie-obrazow-w-gmailu/
- https://www.xataka.com/basics/como-evitar-que-alguien-se-entere-de-que-has-leido-su-correo-usando-mailtrack