Try if this works, regester his email at this site and then here is another link that trace emails but this one is not free use a linux box and then do a DIG command on the domain name DIG is Domain Information Groper. Also see this link to read so much more on email headers and the exact way email works and then here is a website where you can download very good software like this one try the demo and if you like it then search for it on to download the full version for free. I hope this help a bit.