private boolean noUsers(String mailServerId) throws EntityException {
   boolean check = false;
   int userNum = 0;
   try {
     userNum = cdao.checkUsersForMailServer(mailServerId);
     if (userNum == 0) {
       check = true;
     }
   } catch (DBAccessException ee) {
     throw new EntityException("Error checking Users for the Mail Server ", ee);
   }
   return check;
 }