MailTrackerBlocker
MailTrackerBlocker is a free, open-source security and privacy app for macOS. Email tracker, read receipt and spy pixel blocker plugin for macOS Mail (10.11-13.x). It has 1,124 GitHub stars and is released under the BSD-3-Clause license. Its source code is on GitHub at apparition47/MailTrackerBlocker.
github.com/apparition47/MailTrackerBlocker (opens in a new tab)
Data as of from the GitHub API; description from the project's repository. Report an error
About MailTrackerBlocker
MailTrackerBlocker is a email tracker blocking plugin (mailbundle) for macOS Mail. 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. Find out who is tracking you and block spy pixels without needing to disable "load remote content in messages" so that you can browse your inbox privately with images displayed once again.
Install MailTrackerBlocker
Package names found in the project's README. Each links to its package page so you can check the publisher first.
brew install mailtrackerblockerSimilar apps
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Is MailTrackerBlocker free and open source?
Yes. MailTrackerBlocker's source code is public on GitHub under the BSD-3-Clause license, which is OSI-approved or FSF-free, so you can use, copy and change it for free.
How do I install MailTrackerBlocker?
Homebrew: brew install mailtrackerblocker. The commands are on this page. Installers are also on its GitHub Releases page (latest: 0.8.10).
Is MailTrackerBlocker still maintained?
The repository's most recent commit was on Sep 12, 2026. appsgit only lists apps whose repository had a commit in the last six months.