title: Gmail signature not working on mailto
body: <p>When I use Gmail to send an email, the email signature defined in the settings is automatically added at the bottom of the email. However, when I open a mailto link to send a message, the email signature is not automatically added. </p>
  
  <p>Here's the code: </p>
  
  <pre><code>&lt;a href="mailto:john@smith.com?subject=Thanks for your time&amp;body=Hi,%0A%0AIt%20was%20a%20real%20pleasure%20speaking%20with%20you.%20Thank%20you%20for%20your%20time%20and%20we'll%20be%20in%20touch%20soon." target="_blank"&gt;test&lt;/a&gt;
  </code></pre>
  
  <p>And there's a jsFiddle <a href="http://jsfiddle.net/n2utsjpz/" rel="noreferrer">here</a>. What do I need to do to make the email signature appear when I'm sending from a mailto link?</p>