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Doubletick for Gmail
Track email opens, know which emails are opened by recipient
127 votes·21 comments·Aug 4, 2021
About
https://www.getdoubletick.com is a Free and Unlimited email tracking tool for Gmail and G-Suite, adds double checkmarks ✔✔ to your mail if it is read by the recipient (Just like WhatsApp) and notifies you with real-time notification.