title: Regex to validate International email
body: <p>Not sure if there is a solution available but not able to find. So asking it again.</p>
  
  <p>I am writing an email validator. This should validate all well formed email(This is just one level of validation to check the email is well formed). Now as my code is an international code so i should support non latin characters also. How do i write the most efficient Regex for that?</p>
  
  <p>International Emails: <a href="http://en.wikipedia.org/wiki/International_email" rel="noreferrer">http://en.wikipedia.org/wiki/International_email</a></p>
  
  <p>Some example emails: </p>
  
  <ol>
  <li>伊昭傑@郵件.商務</li>
  <li>राम@मोहन.ईन्फो</li>
  <li>юзер@екзампл.ком</li>
  <li>θσερ@εχαμπλε.ψομ</li>
  </ol>
  
  <p>It should be able to validate all the above formats</p>