Kalau pengelola mail domainnya memang susah dihubungi olehnya karena
satu dan lain alasan, maka test kirim mail ke sender itu menggunakan
akun di free public domain (yahoo, gmail, hotmail) dan minta di reply,
lalu periksa headernya untuk cari tahu sender itu kalau kirim mail pakai
server apa lalu cari nama hostnya di smtp-in log.

Dear pak Syafril,

Saya sudah menemukan host sender, melalui header email sender yang dikirimkan ke akun gmail saya. Ternyata, host yang digunakan sender adalah host dari ISP yang sama kami gunakan.


***********************************************************************
Delivered-To: alie...@gmail.com
Received: by 10.31.166.82 with SMTP id p79csp931070vke;
       Fri, 23 Oct 2015 02:24:49 -0700 (PDT)
X-Received: by 10.68.254.232 with SMTP id al8mr4037914pbd.64.1445592289775;
       Fri, 23 Oct 2015 02:24:49 -0700 (PDT)
Return-Path: <sam...@miraeindah.co.id>
Received: from mailhost5.tgg.net.id ([202.43.114.229])
by mx.google.com with ESMTP id px4si28198263pac.14.2015.10.23.02.24.48
       for <alie...@gmail.com>;
       Fri, 23 Oct 2015 02:24:48 -0700 (PDT)
Received-SPF: pass (google.com: domain of sam...@miraeindah.co.id designates 202.43.114.229 as permitted sender) client-ip=202.43.114.229;
Authentication-Results: mx.google.com;
spf=pass (google.com: domain of sam...@miraeindah.co.id designates 202.43.114.229 as permitted sender) smtp.mailfrom=sam...@miraeindah.co.id
Received: from mailhost5.tgg.net.id (localhost [127.0.0.1])
   by mailhost5.tgg.net.id (Postfix) with ESMTP id 56636185F0B1;
   Fri, 23 Oct 2015 16:24:49 +0700 (WIT)
Received: from mailhost5.tgg.net.id (localhost [127.0.0.1])
   by mailhost5.tgg.net.id (Postfix) with ESMTP id 4A561185F0B2;
   Fri, 23 Oct 2015 16:24:49 +0700 (WIT)
Received: from userPC (unknown [27.123.0.46])
   by mailhost5.tgg.net.id (Postfix) with ESMTPSA id 6F355185F0B1;
   Fri, 23 Oct 2015 16:24:48 +0700 (WIT)
From: "muhammad samson " <sam...@miraeindah.co.id>
To: "'alim s'" <alie...@gmail.com>
Cc: "'Alim-GGI'" <a...@ggindonesia.co.id>,
   <r...@ggindonesia.co.id>
References: <CAMcJVbvq6nSNaj8ZiG96pfFk46VijAR4KXvLP=HbNrMyCa=a...@mail.gmail.com> In-Reply-To: <CAMcJVbvq6nSNaj8ZiG96pfFk46VijAR4KXvLP=HbNrMyCa=a...@mail.gmail.com>
Subject: RE: Test email from gmail
Date: Fri, 23 Oct 2015 16:24:39 +0700
Message-ID: <00ad01d10d74$a6124e40$f236eac0$@co.id>
MIME-Version: 1.0
Content-Type: multipart/alternative;
   boundary="----=_NextPart_000_00AE_01D10DAF.52712640"
X-Mailer: Microsoft Office Outlook 12.0
Thread-Index: AdENcJUiLRs8XTRZRSSf/Nd9jzZLXwABAhUg
Content-Language: ko
.....

***********************************************************************


Saya akan coba ISP yang bersangkutan perihal masalah ini.

Terima kasih,
Alim




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