public static string UnescapeIdnDomain( string email )
Public Shared Function UnescapeIdnDomain ( email As String ) As String
You can use this method to convert e-mail address string you received from external sources (such as in e-incoming mails) back to human-readable format. It's safe to use this method for addresses which don't contain any Punycode sequences, you'll just get the same output as input.
This method converts "firstname.lastname@example.org" to "user@яндекс.рф". Only domain part (after "@") is converted.