title: Japanese/chinese email addresses?
body: <p>I'm making some site which must be fully unicode.
  Database etc are working, i only have some small logic error.
  Im testing my register form with ajax if fields are valid, in email field i check with regular expressions.</p>
  
  <p>However if a user has a email address like 日本人@日人日本人.com it isn't coming trough.</p>
  
  <ol>
  <li>This type of mail addresses exist?</li>
  </ol>
  
  <p>Are email addresses always like this? (a-z A-Z 0-9) <strong>@</strong> (a-z A-Z 0-9).(a-z A-Z 0-9)</p>