On Mon, 4 Mar 2013 08:05:03 +0000, jessejazza3.uk@gmail.com said:
i couldn't think what to look up. google on "email tracking" or receipt would have helped.
You want "web bug": see http://en.wikipedia.org/wiki/Web_bug.
Other tracking can be done with the "Disposition-Notification-To" and/or "Return-Receipt-To" headers: see http://en.wikipedia.org/wiki/Return_receipt#Message_Disposition_Notification...
By the way, both "I" and "Google" should start with a capital letter (whatever happened to Capt'n Grammar?)