Selamat sore pak syafril,
Saya dapat info dari rekan di jakarta.
Ada yg tidak bisa kirim email ke domain email kami.
Berikut pesan errornya,

From: System Administrator
Sent: Wednesday, September 29, 2010 8:10 AM
To: Sabarudin
Subject: Undeliverable: TEST 12


Your message did not reach some or all of the intended recipients.

Subject: TEST 12

Sent: 9/29/2010 8:10 AM


The following recipient(s) cannot be reached:

[email protected] on 9/29/2010 8:10 AM

There was a SMTP communication problem with the recipient's email server.
Please contact your system administrator.

<harindo.com #5.5.0 smtp;554 Sorry, message looks like spam or phish to me
(OP)>

Client tersebut kirim error'nya via gmail pak.
Saya sudah cek di archieve
(http://www.mail-archive.com/[email protected]/msg11175.html). 
Berbahaya kah kalau saya inputkan di white-list?

Salam,
Agus Sudana



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