Here’s a quick how-to guide on how you can track email to it’s originating locationby figuring out the email’s IP address and looking it up. I have found this to be quite useful on many occasions for verification purposes since I receive lots of emails daily due to my blog. Tracking the IP address of an email sender does require looking at some technical details, so be ready to dig your heels in!
http://www.usus.org/elements/tracing.htm
http://www.online-tech-tips.com/computer-tips/how-to-track-the-original-location-of-an-email-via-its-ip-address/