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Microsoft KB Archive/253619

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Knowledge Base

XCON: Message Transfer Agent Logs Event 3150 When Receiving an Invalid Message from the Internet Mail Service

Article ID: 253619

Article Last Modified on 10/26/2006


  • Microsoft Exchange Server 5.5 Standard Edition

This article was previously published under Q253619


An event similar to the following may be logged in the application event log:

Event ID: 3150
Source: MSExchangeMTA
Type: Warning
Category: X.400 Service
An internal MTA error occurred. Object 00000000 failed integrity verification. DB Attribute: 0. OM attribute: 0. Entity Name: /o=Site/ou=Server/cn=Configuration/cn=Connections/cn=Internet Mail Connector (SERVERNAME). [XAPI GATEWAY 30 1 130 (14).

The incoming message is lost and the sender does not receive a non-delivery report (NDR).


This issue can occur if the Internet Mail Service builds an invalid X.400 message. The message is invalid because the MTS Identifier (MTS-ID) is missing the global domain identifier; only the local string identifier is present.

This can occur if the X.400 address of the administrator mailbox for the Internet Mail Service is comprised of uppercase characters, for example:

C=US; A=ADMD; P=PRMD; S=Administrator

The Internet Mail Service can only process the "c=," "a=," and "p=" if they are lowercase characters.


To resolve this problem, obtain the latest service pack for Exchange Server 5.5. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

191014 XGEN: How to Obtain the latest Exchange Server 5.5 Service Pack


To work around this issue, edit the E-mail Addresses raw property of the administrator mailbox for the Internet Mail Service, and change the "C=," "A=," and "P=" in the X.400 address to "c=," "a=," and "p=."


Microsoft has confirmed that this is a problem in Microsoft Exchange Server version 5.5. This problem was first corrected in Exchange Server 5.5 Service Pack 4.

Additional query words: imc ims

Keywords: kbbug kbexchange550presp4fix kbexchange550sp4fix kbfix kbqfe KB253619