title: Including background image with CID
body: <p>I need to embedd an image into an HTML mail. The image itself is already working and embedded into the mail as it is supposed to but there is one problem:
  The pic is shown via : <code>&lt;img src="cid:cidname" width="550" height="95" /&gt;</code>
  but not with:</p>
  
  <pre><code>&lt;div id="head" style="width:550px; height:95px; margin-bottom:0px; background-image:url(cid:cidname); background-repeat:no-repeat;"&gt;&lt;/div&gt;
  </code></pre>
  
  <p>Anyone got an idea what might cause the problem?</p>