> Coba periksa ke smtp-in log, cari transaksi dari sender host
> itcs-mail.itca-ad.itochu.com.sg yang ditolak hari ini.
> 
Ini pak untu smtp log in nya, dan untuk user lain dengan domain yang sama tidak 
bermasalah untuk kirim email ke kami

Tue 2012-08-14 16:37:10: [498416:1] Session 498416; child 1
 Tue 2012-08-14 16:37:10: [498416:1] Accepting SMTP connection from 
[203.127.52.11:25424] to [165.108.159.10:25]
 Tue 2012-08-14 16:37:10: [498416:1] --> 220-mail.jkt.itochu.co.id ESMTP 
MDaemon 12.5.3; Tue, 14 Aug 2012 16:37:10 +0700
 Tue 2012-08-14 16:37:10: [498416:1] --> 220 No public service mail PT. Itochu 
Indonesia
 Tue 2012-08-14 16:37:11: [498416:1] <-- EHLO itcs-mail.itca-ad.itochu.com.sg
 Tue 2012-08-14 16:37:11: [498416:1] --> 250-mail.jkt.itochu.co.id Hello 
itcs-mail.itca-ad.itochu.com.sg, pleased to meet you
 Tue 2012-08-14 16:37:11: [498416:1] --> 250-ETRN
 Tue 2012-08-14 16:37:11: [498416:1] --> 250-AUTH LOGIN CRAM-MD5 PLAIN
 Tue 2012-08-14 16:37:11: [498416:1] --> 250-8BITMIME
 Tue 2012-08-14 16:37:11: [498416:1] --> 250 SIZE
 Tue 2012-08-14 16:37:11: [498416:1] <-- MAIL FROM:<[email protected]>
 Tue 2012-08-14 16:37:11: [498416:1] Performing IP lookup 
(itcs-mail.itca-ad.itochu.com.sg)
 Tue 2012-08-14 16:37:11: [498416:1] *  Error: *  Name server reports domain 
name unknown
 Tue 2012-08-14 16:37:11: [498416:1] ---- End IP lookup results
 Tue 2012-08-14 16:37:11: [498416:1] --> 501 <itcs-mail.itca-ad.itochu.com.sg> 
is invalid or DNS says does not exist
 Tue 2012-08-14 16:37:11: [498416:1] SMTP session terminated (Bytes in/out: 
76/358)
 
salam
Benny


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