Turn on your read receipts to make sure your emails are getting seen and to better plan your follow up calls

Note: Before you can do this read receipts must be enabled on your domain by your Google Apps Administrator for you to access this feature.

Here’s how to request a read receipt:

1. Compose (or Reply to) a message as usual in Gmail
2. Click the More options icon in the lower-right corner of the compose window
3. Click Request read receipt from the drop down
4. Send your message

Receipt requests will be sent to every recipient in the To: and Cc: fields. It does not send a request to recipients in the Bcc: field.

https://youtu.be/k2CM4n3B8GA