>Cara memeriksanya bukan begitu :-)

>Periksa ke mail header dari message yang diterima recipient.
>Kalau perlu bisa diperiksa silang ke smtp-in dari sisi receiver dan smtp-out 
>log dari sisi sender host.

Pak dibawah ini untuk mail header dari message ayng diterima receipient yang 
saya ambil dari WC user kami

X-MDAV-Result: clean
X-MDAV-Processed: mail.jkt.itochu.co.id, Tue, 09 Jul 2013 16:30:08 +0700
Return-path: <[email protected]>
Received: from adrjkesg01.ptadaro.com ([122.129.112.35])
        by mail.jkt.itochu.co.id (mail.jkt.itochu.co.id)
        (MDaemon PRO v13.0.4)
        with ESMTP id md50003847395.msg
        for <[email protected]>; Tue, 09 Jul 2013 16:30:06 +0700
Authentication-Results: mail.jkt.itochu.co.id
        spf=neutral [email protected];
        x-ip-helo=pass smtp.helo=adrjkesg01.ptadaro.com (ip=122.129.112.35);
        x-ip-mail=pass [email protected] (ip=122.129.112.35)
X-Spam-Processed: mail.jkt.itochu.co.id, Tue, 09 Jul 2013 16:30:06 +0700
        (not processed: recipient [email protected] in exclude file)
X-MDHeloLookup-Result: pass smtp.helo=adrjkesg01.ptadaro.com 
(ip=122.129.112.35) (mail.jkt.itochu.co.id)
X-MDMailLookup-Result: pass [email protected] 
(ip=122.129.112.35) (mail.jkt.itochu.co.id)
X-MDDKIM-Result: neutral (mail.jkt.itochu.co.id)
X-Rcpt-To: [email protected]
X-MDRcpt-To: [email protected]
X-MDRemoteIP: 122.129.112.35
X-Return-Path: [email protected]
X-Envelope-From: [email protected]
X-MDaemon-Deliver-To: [email protected]
X-IronPort-Anti-Spam-Filtered: true
X-IronPort-Anti-Spam-Result: 
AqIEAMrH21HAqMq2/2dsb2JhbABahAiDCL1/gTR0giMBAQEEIQEjNAwEAgEIDQQEAQELBRgCAwICMBQGAwEHAQEEDgUIlCubOgGRTo86FhsHBoJNNmkDkAuBLYxhjhOCKA
X-IPAS-Result: 
AqIEAMrH21HAqMq2/2dsb2JhbABahAiDCL1/gTR0giMBAQEEIQEjNAwEAgEIDQQEAQELBRgCAwICMBQGAwEHAQEEDgUIlCubOgGRTo86FhsHBoJNNmkDkAuBLYxhjhOCKA
X-IronPort-AV: E=McAfee;i="5400,1158,7130"; a="1706514"
Received: from unknown (HELO ADRGCAS02.ptadaro.com) ([192.168.202.182])
  by adrjkesg01.ptadaro.com with ESMTP; 09 Jul 2013 15:26:41 +0700
Received: from ADRGMBX02.ptadaro.com ([fe80::998f:eca8:6165:1818]) by
 ADRGCAS02.ptadaro.com ([fe80::75fa:54fe:a132:d284%11]) with mapi id
 14.02.0309.002; Tue, 9 Jul 2013 15:24:16 +0700
Content-Type: multipart/mixed;

Salam
Benny


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