Mail problem

[MikeChoy]

My website was running ok and receiving orders, but recently I'm having this problem. Can anyone advice if this is at hosting end ? or whats the problem

"This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:

[email protected]
Mail sent by user nobody being discarded due to sender restrictions in WHM->Tweak Settings

------ This is a copy of the message, including all the headers. ------

Return-path:
Received: from nobody by uranus.localhost.sg with local (Exim 4.69)
(envelope-from )
id 1NSQGS-00032X-51
for [email protected]; Wed, 06 Jan 2010 15:25:08 +0800
To: xxxxxxxxx
Subject: [xxxxxxxx.COM] Order confirmation
X-PHP-Script: www.xxxxxxxx.com/modules/cashondelivery/validation.php for 124.155.195.7
From: xxxxxxx.COM
Reply-To: xxxxxxxx.COM
Date: Wed, 06 Jan 2010 15:25:08 +0800
X-LibVersion: 3.3.2
MIME-Version: 1.0
Content-Type: multipart/related;
boundary="_=_swift-9645531474b443ad422c0f4.31368454_=_"
Content-Transfer-Encoding: 7bit
Message-ID: <[email protected]>

This is a message in multipart MIME format. Your mail client should not be displaying this. Consider upgrading your mail client to view this message correctly.
--_=_swift-9645531474b443ad422c0f4.31368454_=_
Content-Type: multipart/alternative;
boundary="_=_swift-20834258464b443ad422cef7.44849789_=_"
Content-Transfer-Encoding: 7bit


--_=_swift-20834258464b443ad422cef7.44849789_=_
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit

Hello xxxxxxxxx, thank you for your order on xxxxxxx.COM!

[MikeChoy]

Ok, I have sort of bypassed this error by changing from

PHP mail() function. to SMTP server since our hosting site does not allow "user nobody" to send mail from the server.

Cheers!

[amoon]

Ok, I have sort of bypassed this error by changing from

PHP mail() function. to SMTP server since our hosting site does not allow "user nobody" to send mail from the server.

Cheers!

Thanks! your answer gave me a very good idea of how to solve the problem.

Regards!