Remote host said: 450 4.1.2

Sometimes (rare) when I am sending mail to college I am receiving error msg: Remote host said: 450 4.1.2


What is wrong ?

thanks


-----Original Message-----
From: System Administrator [mailto:System Administrator]
Sent: Thursday, September 14, 2006 12:32 PM
To: yyy@yyy.com
Subject: Delivery Failure


Could not deliver message to the following recipient(s):

Failed Recipient: xxx@xxx.com
Reason: Remote host said: 450 4.1.2 <xxx@xxx.com>:
Recipient address rejected: Domain not found

   -- The header and top 20 lines of the message follows --

Received: from mail.in-revizija.xx [193.95.xxx.xxx] by mariborinfo.xxx with
SMTP;
   Thu, 14 Sep 2006 09:15:41 +0200
Return-Receipt-To: "Zeljko" <yyy@yyy.com>
From: "Zeljko" <yyy@yyy.com>
To: <xxx@xxx.com>
Subject: =?iso-8859-2?Q?RE:_DAV=C8NA_=A9TEVILKA?=
Date: Thu, 14 Sep 2006 09:15:33 +0200
MIME-Version: 1.0
Message-ID:
<!&!AAAAAAAAAAAYAAAAAAAAAJ+dxslEdKFFk0zoQMrMN0XCgAAAEAAAABmmzvhwPh1OndJNKzUW
J9MBAAAAAA==@yyy.com>
X-Mailer: Microsoft Office Outlook 11
Content-Type: multipart/signed;
      protocol="application/x-pkcs7-signature";
      micalg=SHA1;
      boundary="----=_NextPart_000_012B_01C6D7DE.54E1BEF0"
thread-index: AcbXyEM5yv5gKyPbRZmDR9qABFVAOgABS0bA
In-Reply-To:
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962
Disposition-Notification-To: "Zeljko" <yyy@yyy.com>

This is a multi-part message in MIME format.

------=_NextPart_000_012B_01C6D7DE.54E1BEF0
Content-Type: multipart/alternative;
      boundary="----=_NextPart_001_012C_01C6D7DE.54E1BEF0"Start Free Trial