track_mail_read.php

См. документацию.

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