>Saya tidak tahu persisnya kondisi OS di tempat Anda.
>List server ini pakai Win7-64 bit dan tidak masalah sejauh ini setelah
>IPv6 didisable.

Saya tambahkan log smtp-out terlampir, terlihat ada sedikit kejanggalannya,
dimana ada delay untuk sampai ke line :

Mon 2013-05-13 13:28:55: [2479:41] <-- 250
<prvs=1845691732=fina...@mscid.com>, Sender ok

Yang mana untuk sampai ke line ini membutuhkan proses sekitar 51 detik dari
line sebelumnya yaitu :

Mon 2013-05-13 13:28:04: [2479:41] --> MAIL
From:<prvs=1845691732=fina...@mscid.com> SIZE=3643042

menurut saya ini agak janggal mengingat trafik tidak begitu ramai, dan itu
bukanlah proses koneksi ke server luar.
Mungkin Pak Syafril punya penjelasan ilmiah apa kemungkinan yang menyebabkan
delay terjadi.

Regards,
Hidayat


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Mon 2013-05-13 13:28:04: [2479:41] Session 2479; child 41
Mon 2013-05-13 13:28:04: [2479:41] Parsing message 
<f:\msc\mdaemon\remoteq\pd10010001473.msg>
Mon 2013-05-13 13:28:04: [2479:41] *  From: fina...@mscid.com
Mon 2013-05-13 13:28:04: [2479:41] *  To: budi...@sub-mscid.com
Mon 2013-05-13 13:28:04: [2479:41] *  Subject: PVA/PDA : SIMA SINGAPORE 
HB318A/R ETA 03.05.13 ETD 05.05.13
Mon 2013-05-13 13:28:04: [2479:41] *  Size (bytes): 3643042
Mon 2013-05-13 13:28:04: [2479:41] *  Message-ID: 
<017401ce4fa2$754f9890$5feec9b0$@com>
Mon 2013-05-13 13:28:04: [2479:41] Attempting SMTP connection to [sub-mscid.com]
Mon 2013-05-13 13:28:04: [2479:41] Resolving MX records for [sub-mscid.com] 
(DNS Server: 136.68.93.1)...
Mon 2013-05-13 13:28:04: [2479:41] *  P=010 S=000 D=sub-mscid.com TTL=(6) 
MX=[mail.sub-mscid.com]
Mon 2013-05-13 13:28:04: [2479:41] *  P=020 S=001 D=sub-mscid.com TTL=(6) 
MX=[mail.sby.dnet.net.id]
Mon 2013-05-13 13:28:04: [2479:41] Attempting SMTP connection to 
[mail.sub-mscid.com:25]
Mon 2013-05-13 13:28:04: [2479:41] Resolving A record for [mail.sub-mscid.com] 
(DNS Server: 136.68.93.1)...
Mon 2013-05-13 13:28:04: [2479:41] *  D=mail.sub-mscid.com TTL=(6) 
A=[202.148.13.226]
Mon 2013-05-13 13:28:04: [2479:41] Attempting SMTP connection to 
[202.148.13.226:25]
Mon 2013-05-13 13:28:04: [2479:41] Waiting for socket connection...
Mon 2013-05-13 13:28:04: [2479:41] *  Connection established (136.68.93.2:51957 
-> 202.148.13.226:25)
Mon 2013-05-13 13:28:04: [2479:41] Waiting for protocol to start...
Mon 2013-05-13 13:28:04: [2479:41] <-- 220 mail.sub-mscid.com ESMTP MDaemon 
13.0.5; Mon, 13 May 2013 13:36:47 +0700
Mon 2013-05-13 13:28:04: [2479:41] --> EHLO mail.mscid.com
Mon 2013-05-13 13:28:04: [2479:41] <-- 250-mail.sub-mscid.com Hello 
mail.mscid.com, pleased to meet you
Mon 2013-05-13 13:28:04: [2479:41] <-- 250-ETRN
Mon 2013-05-13 13:28:04: [2479:41] <-- 250-AUTH LOGIN CRAM-MD5 PLAIN
Mon 2013-05-13 13:28:04: [2479:41] <-- 250-8BITMIME
Mon 2013-05-13 13:28:04: [2479:41] <-- 250 SIZE
Mon 2013-05-13 13:28:04: [2479:41] --> MAIL 
From:<prvs=1845691732=fina...@mscid.com> SIZE=3643042
Mon 2013-05-13 13:28:55: [2479:41] <-- 250 <prvs=1845691732=fina...@mscid.com>, 
Sender ok
Mon 2013-05-13 13:28:55: [2479:41] --> RCPT To:<budi...@sub-mscid.com>
Mon 2013-05-13 13:28:56: [2479:41] <-- 250 <budi...@sub-mscid.com>, Recipient ok
Mon 2013-05-13 13:28:56: [2479:41] --> DATA
Mon 2013-05-13 13:28:56: [2479:41] <-- 354 Enter mail, end with <CRLF>.<CRLF>
Mon 2013-05-13 13:28:56: [2479:41] Sending 
<f:\msc\mdaemon\remoteq\pd10010001473.msg> to [202.148.13.226]
Mon 2013-05-13 13:32:02: [2479:41] Transfer Complete
Mon 2013-05-13 13:32:04: [2479:41] <-- 250 Ok, message saved <Message-ID: 
017401ce4fa2$754f9890$5feec9b0$@com>
Mon 2013-05-13 13:32:04: [2479:41] --> QUIT
Mon 2013-05-13 13:32:04: [2479:41] <-- 221 See ya in cyberspace
Mon 2013-05-13 13:32:04: [2479:41] SMTP session successful (Bytes in/out: 
443/3643304)
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