title: How can i know if an attachment has been downloaded from mail?
body: <p>Recently I came to know that for mails we can,</p>
  
  <pre><code> 1. Track Click-Throughs
   2. Track Opens
  </code></pre>
  
  <p>Read more from this blog <a href="http://davidwalsh.name/read-email" rel="nofollow">You Know How I Know You Read My Email?</a></p>
  
  <p>Now I need to know how I could know whether someone downloaded the <code>attachments</code> in the emails.</p>
  
  <p>Is this possible?</p>
  
  <p>Thanks</p>