How Can I Locate The IP Address Of A Communication That Was Sent Anonymously?

In Outlook, check for the IP address of the email sender. To open the anonymous email in a new window, double-click it. In the top right corner, click the three dots. Then choose "Message source" from the drop-down menu. This will display the email's whole header. Look for the phrase "Received: from." In a string of digits and dots, the IP address will appear.