OpenedOrNot by 500apps is an email tracking browser extension that allows users to track emails until the recipient opens them. It sends out timely notifications to make sure users don't miss important emails. Users can have a bet...
See More ter knowledge of the number of emails sent and opened by using daily reports. Users receive read receipts (green for opened and grey for delivered) each time the recipient opens or reads the email, allowing them to be comfortable that their message was delivered to the intended recipient.