View RAW message source of an email in Outlook 2013

How can I view the source of an email in Outlook 2013?

I want to see the exact email source, as I can do in Gmail or in Mozilla Thunderbird. I'm particularly interested in the top matter (headers?). Here's an example, courtesy Gmail.

Delivered-To:
Received: by 10.50.110.41 with SMTP id hx9csp12093igb;
        Wed, 19 Sep 2012 01:36:43 -0700 (PDT)
Received: by 10.229.137.133 with SMTP id w5mr1607897qct.21.1348043802480;
        Wed, 19 Sep 2012 01:36:42 -0700 (PDT)
Return-Path: 
Received: from smtp1-ext.rs.github.com (smtp1-ext.rs.github.com. [207.97.227.250])
        by mx.google.com with ESMTP id 5si930058qcy.70.2012.09.19.01.36.42;
        Wed, 19 Sep 2012 01:36:42 -0700 (PDT)
Received-SPF: pass (google.com: domain of noreply@github.com designates 207.97.227.250 as permitted sender) client-ip=207.97.227.250;
Authentication-Results: mx.google.com; spf=pass (google.com: domain of noreply@github.com designates 207.97.227.250 as permitted sender) smtp.mail=noreply@github.com
Date: Wed, 19 Sep 2012 01:36:41 -0700
From: Louis 
Reply-To: rg3/youtube-dl 
To: rg3/youtube-dl 
Message-Id: 
In-Reply-To: 
References: 
Subject: Re: [youtube-dl] Youtube Download Slows Down after 10 seconds (#355)
Mime-Version: 1.0
Content-Type: multipart/alternative; boundary=mimepart_50598419db896_3241ecda741010
Precedence: list
List-Archive: https://github.com/rg3/youtube-dl
List-Id: rg3/youtube-dl 
List-Post: 
X-Github-Reason: comment
List-Unsubscribe: 


--mimepart_50598419db896_3241ecda741010
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: Quoted-printable
Content-Disposition: inline

Answer

Headers

1. Open the particular email in a new window by double-clicking on the message in the message list. (This is important, it's not enough to be just looking at the message in what Outlook calls the 'reading pane'.)


2. Follow the menu File | Info | Properties


3. Look for a text area labelled Internet headers


4. Here are the headers. Select and copy the text to a text editor.

Content

1. Open message in a new window


2. On the Message ribbon, select Action | Other Actions | View Source.