I wasn't sure if this should go into N00b Security or Web Security, so if its in the wrong place a apologize. Anyway I was just curious as to if there is anyway to find out if an email that you have sent has been read or not. Specifically using Gmail. I have done some research and I found a few websites that say they can do it along with various other information, but I'd rather be able to do it myself. Is it possible to tell? If not can somone explain to me how these websites work then?
Thanks guys