title: Gmail don't show email markup using Go-To Actions
body: <p>I'm trying to implement in my emails "Go-To Actions" but didn't worked. I tried both json-ld and microdata but noone of them works... any clues? </p>
  
  <p>I send my emails from postMarkApp but in source email code it shows correctly the action (in json-ld and microdata)</p>
  
  <p>Example of markup (copy of google documentation):
      </p>
  
  <pre><code>&lt;script type="application/ld+json"&gt;
  {
    "@context": "http://schema.org",
    "@type": "EmailMessage",
    "action": {
        "@type": "ViewAction",
        "url": "http://www.onfan.com/es/explore",
        "name": "Recomiéndale un restaurante"
        },
  "description": "Recomienda a tu amigo un restaurante"
  }
  &lt;/script&gt;
  </code></pre>
  
  <p>thanks.</p>
  
  <p>Joan</p>