public ActionResult ValidateEmailAddress(string emailString)
 {
     try
     {
         using (var uow = ObjectFactory.GetInstance <IUnitOfWork>())
         {
             EmailAddressDO emailAddressDO = _emailAddress.ConvertFromString(emailString, uow);
             if (!(RegexUtilities.IsValidEmailAddress(_configRepository, emailAddressDO.Address)))
             {
                 return(Json("Invalid email format"));
             }
             else
             {
                 return(Json(true));
             }
         }
     }
     catch (Exception ex)
     {
         return(Json(ex.Message));
     }
 }