blacklisted after transition to exchange 2007

jakgumbo used Ask the Experts™
transitioned to exchange 2007 today, now all of a sudden getting blacklisted and am unable to send to several domains.  any thoughts?  example below.
Delivery has failed to these recipients or distribution lists:
Microsoft Exchange has been trying to deliver this message without success and has stopped trying. Please try sending this message again, or provide the following diagnostic text to your system administrator.
Diagnostic information for administrators:
Generating server:
#< #4.4.7> #SMTP#
Original message headers:
Received: from ([]) by with Microsoft SMTPSVC(6.0.3790.1830);	 Mon, 20 Jul
 2009 09:17:07 -0400
Received: from ([fe80::3160:1e19:34ec:dfbd])
 by ([fe80::3160:1e19:34ec:dfbd%11]) with
 mapi; Mon, 20 Jul 2009 09:17:07 -0400
From: "user" <>
To: user <>
Date: Mon, 20 Jul 2009 09:16:58 -0400
Subject: RE: new email system
Thread-Topic: new email system
Thread-Index: AcoJPEPl8meyzsJGRZK3IHb26Kky0AAAAvQg
Message-ID: <>
References: <>
In-Reply-To: <>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach: yes
acceptlanguage: en-US
Content-Type: multipart/related;
MIME-Version: 1.0
X-OriginalArrivalTime: 20 Jul 2009 13:17:07.0712 (UTC) FILETIME=[61CEF000:01CA093C]

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Expert of the Quarter 2009
Expert of the Year 2009

There is nothing in that NDR to say that you are blacklisted. The NDR actually doesn't say anything of any use.
What makes you say you are blacklisted?

Have you ensured that the FQDN on your Send Connector is configured correctly, and is a valid host name on the internet?

Other than turning Exchange 2007 in to an open relay - which is pretty hard to do - there is little that the transition to Exchange 2007 could have done to cause you to be blacklisted.



how can i check the fqdn on the send connector?
Expert of the Quarter 2009
Expert of the Year 2009

Properties of the Send Connector would be a good place to start, in the box labelled FQDN. If you haven't changed it then it will be the FQDN of the server, whereas it should be the FQDN that the server is known as on the internet.

You have receive DSN with error 4.4.7. This error code has the following meaning
The message in the queue has expired. The sending server tried to relay or deliver the message, but the action was not completed before the message expiration time occurred. This NDR may also indicate that a message header limit has been reached on a remote server or that some other protocol timeout occurred during communication with the remote server.
Troubleshooting: This code typically indicates an issue on the receiving server. Verify the validity of the recipient address, and verify that the receiving server is configured to receive messages correctly. You may have to reduce the number of recipients in the header of the message for the host that you are receiving this NDR from. If you resend the message, it is placed in the queue again. If the receiving server is on line, the message is delivered.

So you must check:
1. A record in public DNS for your sendig mail server  
2. FQDN on sending connector  (same as A record ion public DNS)
3  Use  TELNET and send test mesage from yor sending server

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