<?
define("NO_KEEP_STATISTIC", "Y");
define("NO_AGENT_STATISTIC","Y");
define("DisableEventsCheck", true);
define("NO_AGENT_CHECK", true);

define('SKIP_TEMPLATE_AUTH_ERROR', true);
define('NOT_CHECK_PERMISSIONS', true);

require_once($_SERVER["DOCUMENT_ROOT"]."/bitrix/modules/main/include/prolog_before.php");

header('Content-Type: image/gif');
echo base64_decode("R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==");

\Bitrix\Main\Mail\Tracking::readFromRequest();

require_once($_SERVER["DOCUMENT_ROOT"]."/bitrix/modules/main/include/epilog_after.php");