title: How to check if an email address exists without sending an email?
body: <p>I have come across this <a href="http://www.webdigi.co.uk/blog/2009/how-to-check-if-an-email-address-exists-without-sending-an-email/" rel="noreferrer">PHP code to check email address using SMTP without sending an email</a>.</p>
  
  <p>Has anyone tried anything similar or does it work for you? Can you tell if an email customer / user enters is correct &amp; exists?</p>