mail problem

[vpns2000]

hello,
i have a Problem with my mailserver ( Postfix).
Make a Email with my Outlook to this Domain zwentendorf-donau.gv.at
then retournet my Emailserver this Messages:

• This is the Postfix program at host ns1.xxxxxxx.com.
  
  I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.
  
  For further assistance, please send mail to <postmaster>
  
  If you do so, please include this problem report. You can delete your own text from the attached returned message.
  
  The Postfix program
  
  <christian.richter@zwentendorf-donau.gv.at>: host
  mx1.noe.gemserver.at[212.183.7.18] said: 550 This address is not allowed
  (in reply to MAIL FROM command)

The Header Output from Email was retournt is:

• Return-Path: <>
  X-Spam-Checker-Version: SpamAssassin 3.1.1 (2006-03-10) on ns1.xxxxxx.com
  X-Spam-Level:
  X-Spam-Status: No, score=0.3 required=6.0 tests=AWL,HTML_MESSAGE,
  MIME_HTML_MOSTLY,NO_RELAYS autolearn=no version=3.1.1
  X-Original-To: office@xxxxxx.com
  Delivered-To: web2_alfred@ns1.xxxxxx.com
  Received: by ns1.xxxxxx.com (Postfix)
  id A99313A71CE; Wed, 21 Jun 2006 00:16:19 +0200 (CEST)
  Date: Wed, 21 Jun 2006 00:16:19 +0200 (CEST)
  From: MAILER-DAEMON@ns1.xxxxxx.com (Mail Delivery System)
  Subject: Undelivered Mail Returned to Sender
  To: office@xxxxxx.com
  MIME-Version: 1.0
  Content-Type: multipart/report; report-type=delivery-status;
  boundary="E6B933A71CB.1150841779/ns1.xxxxxx.com"
  Message-Id: <20060620221619.A99313A71CE@ns1.xxxxxx.com>
  X-Virus-Status: No
  X-Virus-Checker-Version: clamassassin 1.2.3 with clamscan / ClamAV 0.88.2/1553/Tue Jun 20 23:25:32 2006
  Status:
  

Thenks for your Help

[falko]

The problem is that mx1.noe.gemserver.at doesn't know the email address christian.richter@zwentendorf-donau.gv.at. It has nothing to do with your server.

[vpns2000]

Hello,

I have already thought to me this. Unfortunately, I am not so fixed with mail servers.

Originally Posted by falko

The problem is that mx1.noe.gemserver.at doesn't know the email address christian.richter@zwentendorf-donau.gv.at. It has nothing to do with your server.

Very Very Thank you for the infos.