XCON: MTA Could Route Messages Through Higher Costing Routes

ID: Q196665

The information in this article applies to:

Microsoft Exchange Server, version 5.5

SYMPTOMS

The Microsoft Exchange Server message transfer agent (MTA) can send a message through higher costing route when multiple connectors are available.

CAUSE

The MTA uses the final route in a list if retry timers are equal when choosing routes across multiple gateways. In the customer-specific case, the higher costing gateway happened to be lower in the list of currently active in the "connect retry state" than the least costing one.

RESOLUTION

To resolve this problem, obtain the latest service pack for Exchange Server version 5.5. For additional information, please see the following article in the Microsoft Knowledge Base:

Q191014 XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack

The English version of this fix should have the following file attributes or later:


Component: Message Transfer Agent (MTA)

   File Name      Version
   -------------------------
   Dbserver.sch   5.5.2500.0
   Dcprods.cat    5.5.2500.0
   Ems_rid.dll    5.5.2500.0
   Emsmta.exe     5.5.2500.0
   Info4log.cfg   5.5.2500.0
   Infodlog.cfg   5.5.2500.0
   Infollog.cfg   5.5.2500.0
   Infotlog.cfg   5.5.2500.0
   Mtacheck.exe   5.5.2500.0
   Mtamsg.dll     5.5.2500.0
   P2.xv2         5.5.2500.0
   X400om.dll     5.5.2500.0
   X400omv1.dll   5.5.2500.0

STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 5.5. This problem was first corrected in Exchange Server 5.5 Service Pack 3.

Keywords : exc55 EXC55SP3Fix
Version : WinNT:5.5
Platform : winnt
Issue type : kbbug