title: Why there are no sent mails after the Jenkins ext. mail step?
body: <p>I have configured SMTP and the postpone extended email step. Jenkins is white listed, so I do not need to specify the credentials. 
  Job finishes successful. But why it does not sends anything?</p>
  
  <p>Second problem. I had some "successful" ext. email step runs with "no emails were triggered" result.</p>
  
  <p>Full images: 
  <a href="http://s16.postimg.org/5074itjub/image.jpg" rel="noreferrer">http://s16.postimg.org/5074itjub/image.jpg</a></p>
  
  <p><a href="http://s17.postimg.org/5dghc1br1/image.jpg" rel="noreferrer">http://s17.postimg.org/5dghc1br1/image.jpg</a></p>
  
  <p><img src="https://i.stack.imgur.com/BeyKj.jpg" alt="enter image description here"></p>
  
  <p><img src="https://i.stack.imgur.com/jp16e.jpg" alt="enter image description here"></p>