eMailTrackerPro   
by Visualware Inc.   

eMailTrackerPro helps identify the true source of emails to help track suspects, verify the sender of a message, trace and report email abusers. The trace analysis reports the sender's IP address, estimated location, network and domain information. eMailTrackerPro also helps uncover techniques often used to disguise the sender to expose the true origins of the email.
A plug-in for MS Outlook adds a button to the Outlook toolbar for one-click email tracing. For other email programs, the header information may be easily pasted into eMailTrackerPro for quick analysis. A built-in location database tracks emails to a country or region of the world, WHOIS lookups provide abuse reporting information.