Email tracker, read receipt and spy pixel blocker plugin for macOS Apple Mail

What is this?

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.

Blocked Trackers

ActiveCampaign Adobe Amazon SES AWeber Bananatag Boomerang Campaign Monitor Cirrus Insight Close Constant Contact ContactMonkey ConvertKit Critical Impact Emarsys Gem Getnotify GetResponse GitHub GrowthDot FreshMail Hubspot iContact Intercom Litmus Mailchimp Mailgun Mailjet Mailspring MailTrack Mandrill Marketo MixMax Mixpanel NetHunt Outreach phpList Polymail Postmark Return Path Sailthru Salesforce SendGrid Sendy Streak Superhuman Thunderhead Tinyletter Wix YAMM Yesware Zendesk Sell

How do I set this up?

For macOS 10.11 El Capitan, 10.12 Sierra, 10.13 High Sierra, 11 Big Sur, 12 Monterey, 13 Ventura

Install from the link above then MailTrackerBlocker will be automatically enabled. Goto the next step.

For macOS 10.14 Mojave and 10.15 Catalina

Install from the link above then enable the plugin by:

  1. In Mail, open Preferences > General > Manage Plug-ins...
  2. Check MailTrackerBlocker.mailbundle
  3. Click Apply and Restart Mail

Please note that you'll need to do this everytime the plugin is updated. Goto the next step.

How do I use this?

Look for the small Block Icon icon button in the email viewer. Tap to see which trackers have been blocked. Check out the tracker report for an aggregated 30-day view of who's tracking you.

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



MailTrackerBlocker is a free and an open source project done on personal time. Thanks to all who have supported my project!


See an issue? Visit the GitHub Issues page.

Feedback or comments? @apparition47 @apparition47

© 2023 Aaron Lee