Article ID: 324732 - View products that this article applies to.
This article was previously published under Q324732
Your Exchange server hosts a domain called mycompany.com. When you send a message to any recipient whose e-mail addresses are in a domain such as sistercompany.com, you immediately receive the following non-delivery report (NDR).
Note The recipient may be a contact. Additionally, following error event is logged in the Application log in Microsoft Exchange Server 2003:
Event Type: Error
(https://support.microsoft.com/kb/308323/ )How to configure SMTP transport to log an event 756 to track non-delivery reports
In the error event, 5.4.6 means "Routing loop detected" (RFC1893).
This issue occurs if the local Exchange organization is authoritative for the sistercompany.com domain. Because the local Exchange organization is responsible for mail delivery to @sistercompany.com, the categorizer tries to find locally a recipient for that message. The categorizer does not succeed, and then you receive the NDR.
Consider following two scenarios in which the Exchange organization is authoritative for the sistercompany.com domain.
Scenario 1The This Exchange organization is responsible for all mail delivery to this address check box is selected for the SMTP address @sistercompany.com.
(https://support.microsoft.com/kb/321721/ )How to share an SMTP address space in Exchange 2000 Server or in Exchange Server 2003
For Scenario 1
For Scenario 2
If you send a message to a journal recipient, you will receive a 5.4.6 NDR. The journal recipient does not receive e-mail like other users do. When the journal recipient is listed on the recipient list, the categorizer detects a potential loop and then generates an NDR. For more information about message journaling, click the following article number to view the article in the Microsoft Knowledge Base:
843105Additionally, you may also receive a 5.4.6 NDR when you send messages to Microsoft Exchange Server 5.5. For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/843105/ )Troubleshooting message journaling in Exchange Server 2003 and in Exchange 2000 Server
(https://support.microsoft.com/kb/919087/ )Users who have mailboxes on a server that is running Exchange 2000 Server receive an NDR message when they try to send e-mail to Exchange Server 5.5 users
272593For more information about SMTP transport components, visit the following Microsoft Web site:
(https://support.microsoft.com/kb/272593/ )Message generates NDR when sent to a Windows NT Server 4.0 recipient represented as contact in Active Directory
Article ID: 324732 - Last Review: April 23, 2013 - Revision: 6.0