title: Checking for specific email addresses using data annotations
body: <p>How would I check on registration that a user types in a specific email address?  For example, i want my registration form to only allow these email addresses:</p>
  
  <ul>
  <li>@gmail.com</li>
  <li>@yahoo.com</li>
  <li>@live.com</li>
  </ul>