title: google app engine python: how to validate an email address without a proxy server?
body: <p>Trying to create an email validation without sending an email using stmplib from this link</p>
  
  <p><a href="http://www.webdigi.co.uk/blog/2009/how-to-check-if-an-email-address-exists-without-sending-an-email/" rel="nofollow">http://www.webdigi.co.uk/blog/2009/how-to-check-if-an-email-address-exists-without-sending-an-email/</a></p>
  
  <p>Since I haven't write any codes yet and trying to understand what is going on.</p>
  
  <p>It seems like you have to use one of those paid proxy servers like mailgun. (Correct me if I'm wrong)</p>
  
  <p>Are there any other ways we can validate an email address?</p>