Polymail now detects and blocks email tracking on your incoming messages to prevent senders from knowing when you've opened their emails! You'll see this in action as a green check mark in incoming messages:
If you would like to enable this feature, you can do so this way in our Web and Mac apps:
Click on the small carrot in the lower left corner of the app, and then click on Settings in the menu that appears
Click on the Preferences tab on the left side of the page
Block tracking will be the third option from the top:
