Once the add-in is installed, the Add button will change to say “Added.” Click the “X” in the top right to close the window. In the search box in the top right, start typing “message header” and select the “Message Header Analyzer” add-in.Ĭlick the Add button to install the add-in.

To get started, open Outlook and click on Home > Get Add-Ins. This enables you to use it when you’re logged into Outlook in a browser, too. The install process is a pretty simple one plus the add-ins are validated by Microsoft, so they’re safe to use.Īnd if you install the add-in to the desktop client, as we’re going to show you, the add-in will also automatically be added into the Outlook web app. If you’ve never installed an add-in to Outlook, we’ve written about the process before. To get a more useful view, there’s a free add-in you can use. However, the header information is one large block of text, which isn’t that easy to read, especially if you don’t read headers very often.