XFOR: Event 4123; Message Not Delivered When PR_AUTO_FORWARDED & Disable Auto Replies Set

ID: Q192939

The information in this article applies to:

Microsoft Exchange Server, version 5.5

SYMPTOMS

A message sent from Exchange through the Internet Mail Service contains the property PR_AUTO_FORWARDED but the value is set to False or 0. The Internet Mail Service has the "Disable Auto Replies to the Internet" option selected. This message generates the following event 4123 and the message is dropped.


   Event: 4123
   Source: MSExchangeIMC
   Description: A message passing through the Internet Mail Service has
   been intentionally dropped. This is most likely an admin notification
   (message describing mail failure), an out of office notification (OOF),
   or an automatic reply from a user's mailbox. Dropping of OOF messages
   and automatic replies is configurable in the admin pages. The gateway
   must always drop notifications to the administrator, since they often
   cause mail loops.

CAUSE

A third-party gateway may add the PR_AUTO_FORWARDED property per documentation in the Microsoft Developer Network (MSDN). The message is delivered into the Exchange system. If the message is replied to by a user on Exchange and sent to an address that will be delivered through the Internet Mail Service, the system acts on the message based on the property's existence and not its value.

The WorldTalk gateway may add the PR_AUTO_FORWARDED property to messages.

RESOLUTION

To resolve this problem, obtain the latest service pack for Exchange Server version 5.5. For more 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: Internet Mail Service


   File Name      Version
   -------------------------
   Msexcimc.exe   5.5.2387.0

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 2.

Keywords : exc55sp2fix XFOR
Version : WinNT:5.5
Platform : winnt
Issue type : kbbug