XCON: MTA Disconnects and 2004 Event Appears in Event Log

• Microsoft Exchange Server, version 5.5

SYMPTOMS

When you send a message through the X.400 Connector, the message transfer agent (MTA) may disconnect and the following events may be displayed in the event log:

   A command was sent at the network services interface. Control block
   index = 1  Internal Connection Handle (LPI) = 1-15-1
   Message type = NDATA request [POP4 POP4 UP 7 21] (8)

   Event: 2004
   Type: Warning
   Category: Internal Processing
   Description: Attempted to log an unknown event/error. Product
   identifier 0, Event/error code 255 [BASE TCP/IP DRVR 8 0] (14) 

CAUSE

This problem occurs if an error is returned after Winsock flow control has been established between the two servers.

STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 5.5. This problem has been corrected in the latest U.S. service pack for Microsoft Exchange Server version 5.5. For information on obtaining the service pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

Additional query words: dcl

Keywords          : 
Version           : WINDOWS:5.5
Platform          : WINDOWS 
Issue type        : kbbug