Open Google Chrome
There are many tools that allow the tracking of email opens, both free and paid.To start tracking all of the emails sent from your Gmail account, add MailTracker to Chrome by clicking the “Add to Chrome” button:
https://chrome.google.com/webstore/detail/mailtracker-free-email-tr/pgbdljpkijehgoacbjpolaomhkoffhnl
Once the MailTracker is installed, you can create and send your first email. You’ll be able to see information about your email opens in real-time from two different places:
1. In the list of threads with checkmark icons you can see which emails have been read or not.
2. In the conversation with the complete history of the email openings and the details.