title: Email error 503, how to solve?
body: <p>I have problem sending emails, i checked the email sending error logs, and I found this:</p>
  
  <p>RCPT RCPT TO: </p>
  
  <p>503 This mail server requires authentication when attempting to send to a non-local e-mail address. Please check your mail client settings or contact your administrator to verify that the domain or address is defined for this server.</p>
  
  <p>And this:</p>
  
  <p>Sending unsolicited commercial or bulk e-mail to Microsoft's computer network is prohibited. Other restrictions are found at <a href="http://privacy.msn.com/Anti-spam/" rel="nofollow noreferrer">http://privacy.msn.com/Anti-spam/</a>. Violations will result in use of equipment located in California and other states.</p>
  
  <p>And following I dont understand what it means:</p>
  
  <ul>
  <li><p>DATA DATA 354+Start+mail+input;+end+with+.</p></li>
  <li><p>RCPT RCPT TO: 250 Requested mail action okay, completed</p></li>
  <li><p>and some others...</p></li>
  </ul>