Messages may accumulate in the message transfer agent queue and the message flow from Exchange Server to the Microsoft Mail post offices may stop (200003)

SYMPTOMS

Messages may accumulate in the message transfer agent (MTA) queue (the Microsoft Mail Connector queue), and message flow from Exchange Server to the Microsoft Mail post offices may stop. Additionally, you may receive the following error message in the application event log in the Windows NT Event Viewer:

Event ID 2028
Source MTA

A fatal internal MTA error occurred. Contact Microsoft Product Support Services.

Unable to encode the message tracking event. Event node = Vvt07, Error code = Mandatory node cannot be omitted [BASE XFER-IN 25 88](16)

Mail flow worked previously. This problem may occur after a Microsoft Mail server has stopped responding.

RESOLUTION

To correct this problem, follow these steps:

Search for any error message in the application event log that includes the phrase, "Object at fault."
Using File Manager, delete the corresponding .dat file in the MDBData directory. For example, if you find the phrase "Object at fault 0600009B" in the application event log, delete the file Mtadata\DB00009B.dat.
At a command prompt, type:
exchsrvr\bin\ mtacheck /v /f log file name.log
This may also delete more DBxxxxx.dat files.
Restart the services. All the services start successfully.
Examine the Microsoft Mail Connector queue. All the messages are gone.

MORE INFORMATION

For additional information about when to use Mtacheck, click the following article number to view the article in the Microsoft Knowledge Base:

148284 When and how to use the Mtacheck utility

For additional information about the command line syntax of Mtacheck, click the following article number to view the article in the Microsoft Knowledge Base:

149017 MTACheck Event IDs and command line syntax