XCON: MTA Exhibits Slow Performance to X.400 Links When There Is a Slow Link (169691)
The information in this article applies to:
- Microsoft Exchange Server 4.0
- Microsoft Exchange Server 5.0
This article was previously published under Q169691 SYMPTOMS
The Microsoft Exchange Server message transfer agent (MTA) delivers mail
extremely slowly on computers that have multiple X.400 links over TCP/IP if
some of the TCP/IP connections are over slow network links.
CAUSE
Flow control within the MTA code above the WINSOCK layer (within the TP0
Transport layer for TCP/IP or Session layer for TP4) for the slowest
connection is stalling mail for faster connections.
STATUS
Microsoft has confirmed this to be a problem in Microsoft Exchange Server
version 4.0. This problem has been corrected in the latest U.S. Service
Pack for Microsoft Exchange Server version 4.0. For information on
obtaining the Service Pack, query on the following word in the Microsoft
Knowledge Base (without the spaces):
Microsoft has confirmed this to be a problem in Microsoft Exchange Server
version 5.0. This problem has been corrected in the latest U.S. Service
Pack for Microsoft Exchange Server version 5.0. For information on
obtaining the service pack, query on the following word in the Microsoft
Knowledge Base (without the spaces):
MORE INFORMATION
With the fix applied, the MTA changes the flow control method within the
OSI stack above the TCP/IP (or TP4) connection to allow WinSock to handle
flow control. This will make the X.400 links faster because WinSock is
multithreaded and can handle as much as the MTA can hand to it.
Modification Type: | Major | Last Reviewed: | 4/7/2006 |
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Keywords: | kbQFE KBHotfixServer kbbug kbfix kbusage KB169691 |
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