Отвравка писем функцией CEvent::Send

   function send_mail($mail){
            echo "mail in function:".$mail;
              $arEventFields = array(
    "#user_email"           => $mail,
     'EMAIL_FROM' => 'test@email.ru',
     );

            CEvent::SendImmediate("ADD_NEW_USER_TO_GROUP","s1", $arEventFields,"N","29");
      
            echo "message ".$mail, " sended";

            CEvent::Send("ADD_NEW_USER_TO_GROUP","s1", $arEventFields,"N","29");}

addEventHandler("main","OnAfterUserUpdate", Array("MyClass", "OnAfterUserUpdateHandler"));
class MyClass
{
   public static $disableHandler = false;
   

 
    function OnAfterUserUpdateHandler(&$arFields){
  
         $res=$arFields["GROUP_ID"]; // в реске id груп
  
         $key=array_search(5, $res);
    
          echo "поиск ";
         $exists = (array_search(5, array_column($res, 'GROUP_ID'))!== false); // ищим среди групп пользователя пятую
         var_dump($exists);
 echo "<br>";
       if ($exists==true){
            
                    $filter = Array
                    (
                                "GROUPS_ID"=> Array(5) // ID gruppi
);
                    $rsUsers = CUser::GetList(($by="id"), ($order="desc"), $filter);
                    echo "<br>";
                    while($arItem = $rsUsers->GetNext())
                            {
                    
                              send_mail($arItem['EMAIL']);
                                }
     
       }
   
    }

}
  
    function send_mail($mail){
       
          $mailfrom = 'bitrix2j@yandex.ru';

$arEventFields = Array(
 "USER_EMAIL" =>$mail,
 "EMAIL_FROM" =>$mailfrom,
);

CEvent::Send("ADD_NEW_USER_TO_GROUP", "s1", $arEventFields, "N", "29");

}