How to know someone has looked at your email-Email Tracking Hack

Mail Tracking free forever and unlimited. Add double check marks (✓✓) to your Gmail.
Know when your emails are opened.

Mailtrack is an email tracking extension for Gmail that lets you know if the emails you’ve sent have been read or not.

Mailtrack extension adds the double-check marks to your Gmail so you can easily track emails and get a read receipt:

(✓) means that your email has been sent, but not opened.
(✓✓) mean that your email has been opened.

Видео How to know someone has looked at your email-Email Tracking Hack канала Yalkun Hasan