XCON: Additional Error Codes Added for Generic 5.0.0 NDR

If an Exchange 2000 user attempts to send an e-mail message internally or to the Internet, the message may be returned with the following generic non-delivery report (NDR):

This problem occurs because the Exchange 2000 routing engine maps several specific error conditions to the same 5.0.0 NDR error code. This makes it difficult to properly diagnose the root cause of the NDR.

To resolve this problem, obtain the latest service pack for Microsoft Exchange 2000 Server. For additional information, click the following article number to view the article in the Microsoft Knowledge Base: The English version of this fix should have the following file attributes or later:

Component: Transport Core

File name	Version
Phatq.dll	6.0.4418.53

NOTE: The Exchange 2000 information store (Store.exe) has also been updated to include the new error code strings for the NDR codes that are described in the "More Information" section of this article. For additional information about this Store.exe fix, click the article number below to view the article in the Microsoft Knowledge Base:

Microsoft has confirmed that this is a problem in Microsoft Exchange 2000 Server.

This problem was first corrected in Microsoft Exchange 2000 Server Service Pack 1.

This fix adds the following error codes to map to common error conditions that might occur during message transfer and routing.

New Code	Code Description
4.3.2	Message was manually deleted from the queue by an Exchange administrator.
5.4.0	Authoritative host was not found.
5.4.4	No route to message, next hop not found.
5.5.0	Generic protocol error (SMTP error).

These additional error codes improve an Exchange administrator's ability to troubleshoot and diagnose the root cause of mail delivery problems in the Exchange 2000 environment.

For additional information about other NDR error codes, click the article number below to view the article in the Microsoft Knowledge Base: