OpenedOrNot is an Email tracking extension. Email tracking is a mechanism for tracking the delivery of email communications to a specific audience. It entails using a digitally time-stamped technology to establish the exact day and hour of the email's receipt or opening. It is also capable of determining the recipient's IP address. This allows us to know when someone opens our emails and clicks the see attachments links. The software inserts a discrete image pixel into the email that allows you to know the exact time and date that the receiver opened the email.