There is some info in the extended header
Support Center
How to read email headers
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Looking further into the message, you will see the tag called X-Originating-IP: this tag normally gives the real IP address of the sender. The X-Mailer tag says what email client was used to send the email (on our case, the email was sent using FX Webmail).
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Next, it depends what, if any, software is running on your computer. If you are running it knowingly, or if it is covertly installed. There was that case where the school admins were spying on the kids through a hidden program (it might have been a web filtering program in the background, but the kids didn't start it up) that allowed them to connect to the webcam on the Macbooks.
Internet making it easier to become a terrorist - Los Angeles Times
This is an old trick by the terrorists, but it came up again last week where individuals used a shared account and only left the automatically saved draft e-mails for people to read. It becomes harder to trace because they never go from one server to another.
But that only gets you the senders current IP address. Unless you have a VNC (or a different remote desktop application) running, you probably are ok. The easy step to take is to disconnect your computer from the internet or shut it down when not in use. A little harder, yet still viable is to use Linux and keep the security updates up to date. But I was using Linux in college to remote into my desktop at my apartment from campus using VNC. But, you shouldn't really worry about that unless you have been running a lot of questionable (or illegally downloaded) programs. Or if someone else has used your computer that would be interested in watching what you are doing or getting your files.
One other thing is if you share your files on your home network, someone else near by can connect to your wireless network (security or not) and get your shared files.
And I have to recommend
http://www.backtrack-linux.org/ to do that.
