ActionEmail::send

public function send(Notification $notification)
{
	$site = CSite::GetDefSite();

	$fields = static::getNotificationFields($notification);
	$fields["EMAIL"] = $this->getRecipient();
	$fields["ADDITIONAL_TEXT"] = $this->getText();

	BitrixMainMailEvent::send([
		'EVENT_NAME' => self::EVENT_TYPE,
		'C_FIELDS' => $fields,
		'LID' => $site,
	]);
}