How to Trace an IP Address From In-Reply-To
When you receive an email from someone, the "in-reply-to" portion of the email's headers indicates from which IP address the email was received. If you want to trace this IP address back to a server, you can find out the servername with a simple IP lookup command on your computer.
Instructions
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Click "Start" and click "Run" to open the Windows Run command.
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Type "cmd" into the Run box and press "Enter" to open a command prompt.
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Type "ping -a ip_address" into the command prompt, substituting the IP address from your email header for "ip_address." The servername for the IP address you traced appears in the command prompt window.
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