Битрикс: обработчик email рассылки

$eventManager->addEventHandler('sender', 'OnPostingSendRecipientEmail', "OnPostingSendRecipientEmailHandler");

function OnPostingSendRecipientEmailHandler(\Bitrix\Main\Event $event)
{
	$params = $event->getParameter(0);

	$params['BODY'] = str_replace('TEXT_FOR_REPLACE', 'Замена', $params['BODY']);

	$result = new \Bitrix\Main\EventResult($event->getEventType(), $params);
    return $result;
}