servers involved in routing that email to you. To find the first computer that originally sent the email, you'll have to find the Received From that's farthest DOWN . As you can see from the above image, the first one is from a computer called "aseem" with the IP address 72.204.154.191 . Then it was routed to my ISP's server at eastrmmtao104.cox.net and so on and so forth till it got to your email server. The computer aseem is my personal home computer and that's my public IP address for my house! I'll go through Yahoo and Outlook before talking about tracking the location of that IP address. Yahoo Mail Beta 1. Log into your account and open the email (if you're using Yahoo Mail Beta with the new preview interface, make sure you double-click on the email so that it opens in a new tab) 2. At the top right, you'll see there is a drop-down option where Standard Header is selected by default. 3. Click on it and choose Full Header . Again, you'll see the same information as before, just in a different window: Microsoft Outlook 1. Open the email in Outlook by double-clicking on it 2. Go to View at the top menu (the menu options for the email, not the main Outlook window) and choose Options . You'll get a dialog box where you can set the message options and at the bottom you'll see the Internet Headers box. For some silly reason, the box