title: Incoming webhook not working in rocket chat
body: <p>I created new incoming webhook using rocket chat.</p>
  
  <pre><code>&gt; curl -X POST -H 'Content-Type: application/json' --data
  &gt; '{"username":"Ship Reporter","text":"Example
  &gt; message","attachments":[{"title":"Rocket.Chat","title_link":"https://rocket.chat","text":"Rocket.Chat,
  &gt; the best open source
  &gt; chat","image_url":"https://rocket.chat/images/mockup.png","color":"#764FA5"}]}'
  &gt; https://chat.lintcloud.com/hooks/xxxxxxxxx/yyyyyyyyyy
  </code></pre>
  
  <p>If i hit the url using curl its give the response false.</p>
  
  <pre><code>{"success":false}
  </code></pre>
  
  <p>Anybody know this issue please guide me to fix.</p>