How to find our sent mail is whether read or not in GMAIL?

Right Inbox integrates seamlessly with Gmail and lets you schedule your emails to be delivered at a future time and track your email. You may set reminders to the conversations and create recurring emails. You can use Right Inbox to increase your email productivity.

1. Schedule your mail
2. Track your mail and notify when the receiver open & read the mail
3. Email reminders
4. Recurring Emails daily, weekly, monthly, yearly

Other Features:

        Time Zone Support

        Supports to Chrome, Firefox and Safari

        Extensive Customization

        Seamless Integration

 Download Links:

To Chrome: Click Here

To FireFox: Click Here

To Safari : Click Here

Steps to Install: 

     1. Download the extension using the above link

     2. Once download finished, click on it

     3. Then press 'Allow'.

     4. Finally click on " Install Now" button to complete.

     5. Now open your Gmail, and press F5