CAllMailMessage::prepareLongMessage

static function prepareLongMessage(&$messageBody, &$messageBodyHtml): array
{
	if (mb_stripos($messageBody, '--- Below this line is a copy of the message'))
	{
		$mainBodyHtml = $mainBody = explode('--- Below this line is a copy of the message', $messageBody)[0];
	}
	elseif (mb_stripos($messageBodyHtml, '