Article ID: 289045 - View products that this article applies to.
This article was previously published under Q289045
All outbound Internet mail may be returned with a message that is similar to the following:
Your message did not reach some or all of the intended recipients.
Sent: 2/13/2001 11:29 AM
The following recipient(s) could not be reached:
c=US;a= ;p=org;o=site;dda:SMTPemail@example.com; on 2/13/2001 11:33 AM The e-mail system was unable to deliver the message, but did not report a specific reason. Check the address and try again. If it still fails, contact your system administrator.The MTS-ID of the original message is:c=US;a= ;p=org;l=MAILSERVER-010213172832Z-2385 MSEXCH:IMS:org:site:MAILSERVER 3902 (000B099C) Host Unknown
This issue can occur if the Microsoft Windows 2000-based Domain Name System (DNS) server that Exchange 2000 or Exchange Server 2003 is using contains a forward lookup zone for the root domain (.). When Exchange 2000 or Exchange 2003 searches for an MX record to deliver mail, Exchange 2000 or Exchange 2003 queries the DNS server. The DNS server has no knowledge of MX records on the Internet or other DNS servers that might have those records, so Exchange 2000 or Exchange 2003 is unable to route any outbound messages.
To resolve this issue:
If you do not have access to the DNS Console and cannot make changes to the configuration of your DNS server, or if you want to keep DNS resolution local to your internal network and want to retain the forward lookup zone for the root (.) domain, use the following procedure to work around this issue:
For more information about the root zone in Windows 2000, click the following article number to view the article in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/298148/ )How to remove the root zone (dot zone)
Article ID: 289045 - Last Review: December 3, 2007 - Revision: 4.8