<?
AddEventHandler("subscribe", "BeforePostingSendMail", array("SubscribeHandlers", "BeforePostingSendMailHandler"));

class SubscribeHandlers
{
    function BeforePostingSendMailHandler($arFields)
    {
        $rsSub = CSubscription::GetByEmail($arFields["EMAIL"]);
        $arSub = $rsSub->Fetch();

        $arFields["BODY"] = str_replace("#MAIL_ID#", $arSub["ID"], $arFields["BODY"]);
        $arFields["BODY"] = str_replace("#MAIL_MD5#", SubscribeHandlers::GetMailHash($arFields["EMAIL"]), $arFields["BODY"]);

        return $arFields;
    }

    function GetMailHash($email)
    {
        return md5(md5($email) . MAIL_SALT);
    }
}
?>