title: CSS background-image "image" not showing up in Outlook
body: <p>I've got an HTML based email created and one of the elements on there has a "background-image" property defined.  When the email is sent and received in Outlook, the background-image is not displayed.  When it's received in Gmail, it shows up.  I think this might have to do with an Outlook specific restriction?  Here's the HTML code:</p>
  
  <pre><code>&lt;div style="text-align: center; background-image:url('http://image.info.geha.com/lib/fe44157075640479741475/m/1/34273cbe-2375-4a73-aec2-5151bf51cf91.jpg'); border-color:#e3e4e5"&gt;
   &lt;p style=" align: center; bottom: 50px; left: 100
  px;"&gt;
    &lt;br&gt;
    &lt;span style="color:#500778;"&gt;&lt;span style="font-size:20px;"&gt;GEHA EXCLUSIVES&lt;/span&gt;&lt;br&gt;
    &lt;span style="font-size:18px;"&gt;______&lt;/span&gt;&lt;/span&gt;&lt;br&gt;
    &lt;br&gt;
    &lt;br&gt;
    &lt;span style="color:#ee7623;"&gt;&lt;u&gt;&lt;span style="font-size:18px;"&gt;&lt;a href="#"&gt;Link to website content goes here&lt;/a&gt;&lt;/span&gt;&lt;/u&gt;&lt;/span&gt;&lt;br&gt;
    &lt;br&gt;
    &lt;span style="color:#ee7623;"&gt;&lt;u&gt;&lt;span style="font-size: 18px; text-align: center;"&gt;&lt;a href="#"&gt;Link to website content goes here&lt;/a&gt;&lt;/span&gt;&lt;/u&gt;&lt;/span&gt;&lt;br&gt;
    &lt;br&gt;
    &lt;span style="display: none;"&gt;&amp;nbsp;&lt;/span&gt;&lt;span style="color:#ee7623;"&gt;&lt;u&gt;&lt;span style="font-size: 18px; text-align: center;"&gt;&lt;a href="#"&gt;Link to website content goes here&lt;/a&gt;&lt;/span&gt;&lt;/u&gt;&lt;/span&gt;&lt;br&gt;
    &lt;br&gt;
    &lt;br&gt;
    &lt;br&gt;
    &lt;span style="display: none;"&gt;&amp;nbsp;&lt;/span&gt;&lt;/p&gt;&lt;/div&gt;
  </code></pre>
  
  <p>Here's Outlook's rendering:</p>
  
  <p><a href="https://i.stack.imgur.com/dqi9r.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/dqi9r.png" alt="enter image description here"></a></p>
  
  <p>And here's Gmail's rendering:</p>
  
  <p><a href="https://i.stack.imgur.com/KZYBE.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/KZYBE.png" alt="enter image description here"></a></p>
  
  <p>Any ideas why this is?</p>