# MailTrackerBlocker (open-source security and privacy app)

> 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 1,123 GitHub stars and is released under the BSD-3-Clause license. Its source code is on GitHub at apparition47/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.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/apparition47/MailTrackerBlocker |
| Platforms | macOS |
| Interface | desktop GUI |
| GitHub stars | 1,123 |
| License | BSD-3-Clause (open source) |
| Replaces | n/a |
| Language | Objective-C |
| Website | https://apparition47.github.io/MailTrackerBlocker/ |
| Official | no |
| Category | Password managers, encryption & privacy |
| Latest release | 0.8.10 (Feb 11, 2026) |
| Last commit | Sep 12, 2026 |

## Install

### Homebrew (macOS)

```sh
brew install mailtrackerblocker
```

Package page: https://formulae.brew.sh/formula/mailtrackerblocker

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Canonical page: https://appsgit.com/desktop-apps/mailtrackerblocker
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