Awesome Open Source
Awesome Open Source

MailTrackerBlocker Awesome Humane Tech

MailTrackerBlocker is a plugin (mailbundle) for the default Mail app built-in to macOS. Email marketers and other interests often embed these trackers in HTML emails so they can track how often, when and where you open your emails. This plugin labels who is tracking you and strips out spy pixels out of the HTML before display, rendering the typical advice of disabling "load remote content in messages" unnecessary.

Browse your inbox privately with images displayed once again.

Be informed. Say No To Spy Pixels.

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Apple Mail on macOS 10.11 - 11.x.


Recommended Installation via Homebrew Cask

You can install MailTrackerBlocker.pkg directly from the releases page but I strongly recommend installing as an Homebrew Cask for ease of updating.

$ brew install mailtrackerblocker

To enable and use

  1. [Additional step for macOS 10.14, 10.15 only] Open Mail, goto Preferences > General > Manage Plug-ins... > check "MailTrackerBlocker.mailbundle" > Apply and Restart Mail. Note that you'll need to do this again for each update.
  2. Tap on the button to find out what was blocked.

⚠️ Disabling "load remote content in messages" with MailTrackerBlocker enabled is redundant; re-enable this option for the best experience.

To uninstall

If you installed with Homebrew:

$ brew uninstall mailtrackerblocker

If you installed the pkg manually:

osascript -e "quit app \"Mail\""
sudo rm -r /Library/Mail/Bundles/MailTrackerBlocker.mailbundle
sudo rm -r /Library/Application\ Support/com.onefatgiraffe/mailtrackerblocker
sudo pkgutil --forget com.onefatgiraffe.mailtrackerblocker

Building from source

A. Makefile

git clone
cd MailTrackerBlocker

B. Xcode

  1. Give Xcode Full Disk Access from System Preferences > Security & Privacy > Privacy > Full Disk Access and add Xcode.
    • Required because the mailbundle needs to be installed into /Library/Mail/Bundles.
  2. Open the Xcode project, hit build.
    • Big Sur and up: allow Finder access to allow Xcode to copy unsigned directly into sandboxed env




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