eMailTrackerPro

EMailTrackerPro will use the header in the email to find out the IP address of the computer from which the email was sent.

This can be useful in identifying the spammer and their location from where they are sending the email. Many spammers operate under the radar, trying to use all sorts of email addresses that may not even exist. This product will show you where the actual email is coming from. The plug-in for MS Outlook adds a button to the toolbar, then just one click and a search result window will open.
For other mail clients, just copy the header information and paste it into the application manually. The information can be exported to a clear HTML document.