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How to View Raw SMTP Email Headers in Outlook

I had to do some SMTP relay troubleshooting and it wasn’t obvious how to view the raw SMTP message in Outlook. So here’s how:

In the message window, choose File/Properties and look at the “Internet headers” at the bottom of the Properties dialog.

Microsoft Outlook Properties dialog - Internet headers

I am using Office Professional Plus 2016. If you have a different version of Outlook such as Outlook 2010 or Outlook 2013, the steps may be different for your version.

Chinh Do

I occasionally blog about programming (.NET, Node.js, Java, PowerShell, React, Angular, JavaScript, etc), gadgets, etc. Follow me on Twitter for tips on those same topics. You can also find me on GitHub.

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