XCON: Exchange MTA Logs NT Event ID 51 (166308)
The information in this article applies to:
- Microsoft Exchange Server 4.0
- Microsoft Exchange Server 5.0
- Microsoft Exchange Server 5.5
This article was previously published under Q166308 SYMPTOMS
A Windows NT event ID 51 appears in the event log on a computer running
Microsoft Exchange Server with configured
X.400 connectors.
3/7/97 8:23:42 PM
MSExchangeMTA
Warning Security 51
N/A
<Exchange_server_name> An unknown MTA has attempted to bind. The MTA
name in bind is <other_mta_host>. The MTA presentation address is
/n:0x636166656F6C65, Association index: 2354. [MTA XFER-IN 23 42] (14)
CAUSE
A remote message transfer agent (MTA) has attempted to establish a
messaging session with the computer running Exchange Server and there has
been a mismatch in the specified security information. The security
information for the computer running Exchange Server is specified on the
remote MTA name or Password fields, the T, S and P selector in the Outgoing
and Incoming OSI address information, and the local MTA name or password
fields on the Override tab of the Exchange connector. Improper entry of any
one or a combination of these results in a security violation.
The Remote and the Local password fields are case-sensitive and must be an
exact match with the information submitted by the adjacent MTA when it
attempts to connect (bind). The T, S and P Selector may be entered in
either hexadecimal or text; verify that only the required fields are
specified and that the required fields are specified in the correct format.
If multiple X.400 connectors use a given transport stack to connect to
foreign X.400 MTAs, verify that each of the connectors has a unique value
specified for the T Selector (TSAP). The T Selector specifies the entry
point to the transport layer of the protocol and as such should be unique.
MORE INFORMATION
Remote MTA name and password fields on the General tab and the Open Sytems
Interconnect (OSI) information for Outgoing and Incoming OSI address
information are on the Stack tab of the X.400 connector configuration
dialog box. P Selector (PSAP) is not supported in 1984 mode. S Selector
(SSAP) is not supported in 1988 X.410 mode. T Selector (TSAP) is the most
uniformly used throughout X.400 MTAs.
Modification Type: | Minor | Last Reviewed: | 4/28/2005 |
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Keywords: | kbtshoot kbusage KB166308 |
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