> 
> Ini problem DNS resolver di server penerima.
> Mungkin firewallnya sedang ngadat (lagi), karena kemarin statusnya juga
> begitu; mungkin hari ini DMZ firewallnya sedang di otak-atik (setting)
> oleh pemiliknya.
> 
> $ host 202.171.1.132
> 132.1.171.202.in-addr.arpa domain name pointer ganesha.ntt.net.id.

Ok pak
 

> Ini transkrip transaksinya belum selesai, mestinya sih tidak ditolak
> karena Anda sudah terima DSN nya.
> Tidak perlu dilakukan tindakan apa-2x dalam ini di sisi Anda.

Terima kasih atas sarannya pak, berikut saya sertakan detail smtp in log nya 
lagi pak
Jadi problemnya tadi kami test lagi ke email customer dan terima error mail 
delivery system lagi seperti dibawah ini 

From:Mail Delivery System <[email protected]> (Add to Contacts)
date:09/03/2014 03:52 PM
to: <[email protected]>

The following message to <[email protected]> was undeliverable.
The reason for the problem:
5.1.0 - Unknown address error 501-'Connecting IP must have valid PTR record for 
202.171.1.132'
Reporting-MTA: dns; ganesha.ntt.net.id

Final-Recipient: rfc822;[email protected]
Action: failed
Status: 5.0.0 (permanent failure)
Remote-MTA: dns; [202.158.10.34]
Diagnostic-Code: smtp; 5.1.0 - Unknown address error 501-'Connecting IP must 
have valid PTR record for 202.171.1.132' (delivery attempts: 0)

Dan setelah kami cek di SMTP in Lognya seperti dibawah ini 

Wed 2014-09-03 15:51:31: 05: [687079] Session 687079; child 0001
Wed 2014-09-03 15:51:31: 05: [687079] Accepting SMTP connection from 
[202.171.1.132:59536] to [165.108.159.10:25]
Wed 2014-09-03 15:51:31: 03: [687079] --> 220-mail.jkt.itochu.co.id ESMTP 
MDaemon 14.0.3; Wed, 03 Sep 2014 15:51:31 +0700
Wed 2014-09-03 15:51:31: 03: [687079] --> 220 No public service mail PT. Itochu 
Indonesia
Wed 2014-09-03 15:51:31: 02: [687079] <-- EHLO ganesha.ntt.net.id
Wed 2014-09-03 15:51:31: 05: [687079] Performing IP lookup (ganesha.ntt.net.id)
Wed 2014-09-03 15:51:31: 05: [687079] *  D=ganesha.ntt.net.id TTL=(6) 
A=[202.171.1.132]
Wed 2014-09-03 15:51:31: 05: [687079] ---- End IP lookup results
Wed 2014-09-03 15:51:31: 03: [687079] --> 250-mail.jkt.itochu.co.id Hello 
ganesha.ntt.net.id, pleased to meet you
Wed 2014-09-03 15:51:31: 03: [687079] --> 250-ETRN
Wed 2014-09-03 15:51:31: 03: [687079] --> 250-AUTH LOGIN CRAM-MD5 PLAIN
Wed 2014-09-03 15:51:31: 03: [687079] --> 250-8BITMIME
Wed 2014-09-03 15:51:31: 03: [687079] --> 250 SIZE 20480000
Wed 2014-09-03 15:51:31: 02: [687079] <-- MAIL FROM:<> SIZE=4045
Wed 2014-09-03 15:51:31: 03: [687079] --> 250 <>, Sender ok
Wed 2014-09-03 15:51:31: 02: [687079] <-- RCPT 
TO:<[email protected]>
Wed 2014-09-03 15:51:31: 01: [687079] Performing Backscatter Protection...
Wed 2014-09-03 15:51:31: 01: [687079] *  Address: 
[email protected]
Wed 2014-09-03 15:51:31: 01: [687079] *  Verifier: key=1 date=323 sha-1 
hmac=b50646
Wed 2014-09-03 15:51:31: 01: [687079] *  Result: pass
Wed 2014-09-03 15:51:31: 01: [687079] --- End Backscatter Protection
Wed 2014-09-03 15:51:31: 05: [687079] Performing DNS-BL lookup (202.171.1.132 - 
connecting IP)
Wed 2014-09-03 15:51:31: 05: [687079] *  zen.spamhaus.org - passed
Wed 2014-09-03 15:51:31: 05: [687079] ---- End DNS-BL results
Wed 2014-09-03 15:51:31: 03: [687079] --> 250 <[email protected]>, 
Recipient ok
Wed 2014-09-03 15:51:31: 02: [687079] <-- DATA
Wed 2014-09-03 15:51:31: 01: [687079] Creating temp file (SMTP): 
s:\mdaemon\queues\temp\md50000181477.tmp
Wed 2014-09-03 15:51:31: 03: [687079] --> 354 Enter mail, end with <CRLF>.<CRLF>
Wed 2014-09-03 15:51:31: 01: [687079] Message size: 4169 bytes
Wed 2014-09-03 15:51:31: 10: [687079] Performing DKIM lookup
Wed 2014-09-03 15:51:31: 10: [687079] *  File: 
s:\mdaemon\queues\temp\md50000181477.tmp
Wed 2014-09-03 15:51:31: 10: [687079] *  Message-ID: 
[email protected]
Wed 2014-09-03 15:51:31: 10: [687079] *  Result: neutral
Wed 2014-09-03 15:51:31: 10: [687079] ---- End DKIM results
Wed 2014-09-03 15:51:31: 06: [687079] Passing message through AntiVirus (Size: 
4169)...
Wed 2014-09-03 15:51:31: 06: [687079] *  Message is clean (no viruses found)
Wed 2014-09-03 15:51:31: 06: [687079] ---- End AntiVirus results
Wed 2014-09-03 15:51:31: 01: [687079] Message creation successful: 
e:\mdaemon\queues\inbound\md50005797567.msg
Wed 2014-09-03 15:51:31: 03: [687079] --> 250 Ok, message saved <Message-ID: 
<[email protected]>>
Wed 2014-09-03 15:51:36: 02: [687079] <-- QUIT
Wed 2014-09-03 15:51:36: 03: [687079] --> 221 See ya in cyberspace
Wed 2014-09-03 15:51:36: 01: [687079] SMTP session successful (Bytes in/out: 
4286/478)

Baik pak kalau masalahnya di sisi customer akan saya informasikan ke IT mereka

Regards
Benny


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