title: Opening socket to deliver email
body: <p>I am doing a proof of concept work, which should be a custom SMTP server implementation. My question now is:</p>
  
  <p>To which host shall I open the connection to, one of those in the MX records or directly to the root.tld?</p>
  
  <p>I am using <a href="http://www.axllent.org/code/fakesmtp/" rel="nofollow">fakeSMTP</a> as base and I wish to extend it a bit more. by actually delivering the email message.</p>