Sometimes you may send important emails to other but they not reply to that mail. You must be confused whether your email reached their mailbox or ignore your mail. Whoreadme is a web service that will help you find when they open the mail.
To get start tracking simply sign up is and send mails to other via Whoreadme. When the tracked email has been opened, the sender can get a notification email from WhoReadMe, then you just login into WhoReadMe account, you will get more information about their recipient it includes Open time, IP Address, Geography location, Operating System, Browser etc.
You can also set expiry date for mails after the data the mail will be automatically deleted from the inbox. Whoreadme offer unlimited amount of attachments in an email. It provides 5 email credits per day for the user.