Event ID - 155

Event Id155
SourceMSExchangeMTA
DescriptionAn error occurred while reading information for directory name (DN) from the directory. [MTA XFER-IN 11 38] (12)
Event InformationAccording to microsoft:
This behavior may occur when the MTA is not shut down cleanly and has messages in its queues. Specifically, if the MTA is shut down after a fatal error during object parsing, it is possible that the object in the database is saved partly parsed. Then, when you try to restart the MTA, the MTA uses binary data from one of the message properties as a distinguished name for the Active Directory object lookup.
Resolution
To resolve this problem, obtain the latest service pack for Microsoft Exchange 2000 Server
Reference LinksXCON: MTA May Crash When You View Exchange 2000 X.400 Queues in Exchange Server 5.5 Exchange Server Administrator Program

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