Lockdown Privacy offers an open-source firewall for blocking trackers, ads, and badware in apps on iPhone and iPad.
MailTrackerBlocker
The MailTrackerBlocker extension for macOS Apple Mail blocks email trackers, read receipts, and tracking pixels.
About MailTrackerBlocker
MailTrackerBlocker is a plugin and extension for the Mail app built into macOS. It labels who is tracking an email and removes spy pixels from HTML before display, addressing email trackers, read receipts and tracking pixels.
It works only with Apple Mail on macOS, with an App version for macOS 14.3 and later and a Plugin version for macOS 10.11 through 13.x. It is intended to allow remote images to display without relying on disabling remote content loading.
Key features
- Blocks email trackers, read receipts and spy pixels in Apple Mail
- Labels which tracker is present in an email
- Removes spy pixels from HTML before messages display
- Allows images to display while trackers are removed
- Provides App for macOS 14.3+ and Plugin for 10.11-13.x
- Detects trackers from listed services such as Mailchimp and SendGrid
Best for: People who read email in Apple Mail on macOS and want trackers removed while keeping images visible.
Good for
- Labels who is tracking an email rather than blocking silently
- Removes spy pixels while allowing remote images to display
- Lists coverage for many common email tracking services
Watch out for
- Only works with the built-in Mail app on macOS
- Requires different download for macOS 14.3+ versus 10.11-13.x
MailTrackerBlocker at a glance
- Category
- Privacy & Security › Desktop & OS Privacy
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- macOS, Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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MailTrackerBlocker FAQ
What is MailTrackerBlocker?
A plugin and extension for the Mail app built into macOS that labels who is tracking you and strips spy pixels from HTML before display.
Which version should I install?
Install the App version for macOS 14.3 and later, and the Plugin version for macOS 10.11 through 13.x.
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