title: Recommended way to use smtp4dev as server of mailkit client messages
body: <p>I have an console application and I installed mailkit package for messaging purposes.</p>
  
  <p>I have code in the main method to test mailkit smtp client. I have smtp4dev dummy server running and the client code is the <a href="https://github.com/jstedfast/MailKit" rel="noreferrer">example code of mailkit in github</a> with the authentication part commented, the host is localhost and the port 26, matching the smtp4dev configuration. </p>
  
  <p>When the client code is executed the smtp4dev <code>stop running</code> and an unhandled exception occurrs, <code>IOException: Unable to read data from the transport connection: an existing connection was forcibly closed by the remote host.</code></p>
  
  <p>How can I configure smtp4dev to receive message from mailkit client?</p>