title: MSMQ: incoming traffic, but messages don't show up in the queue
body: <p>I'm transferring our web application to new infrastructure and I'm stuck at the MSMQ part.</p>
  
  <p>1st screenshot: Server A sends messages to server B. I see the outgoing messages appear on server A.<br>
  2nd screenshot: Server B shows incoming traffic, but the messages don't appear in the queue.</p>
  
  <p>The service picking up the messages at server B is not running!</p>
  
  <p>Any ideas how to debug this situation?</p>
  
  <p><img src="https://i.stack.imgur.com/Ub5U7.png" alt="Server A sends messages to server B. I see the outgoing messages appear on server A.">
  <img src="https://i.stack.imgur.com/CpznC.png" alt="Server B shows incoming traffic, but the messages don&#39;t appear in the queue."></p>