Are you keen to know the details of sender mails with its computer location graphically. then this is for you.
1. open mail that you want to collect the details of sender.
2. then open full header option and select the metadata of this mail and copy (CTRl + C)
4. paste metadata into the text area of above site.
5. click on trace button.
Then it is gives the actual location and details of the sender. Location is gives in graphically.