XFOR: Setting the MSMI to Send SNADS Address as Reply-To

• Microsoft Exchange Server, version 5.0

IMPORTANT: This article contains information about editing the registry. Before you edit the registry, make sure you understand how to restore it if a problem occurs. For information about how to do this, view the "Restoring the Registry" Help topic in Regedit.exe or the "Restoring a Registry Key" Help topic in Regedt32.exe.

SUMMARY

The Microsoft Mail Connector interchange (MSMI) on Microsoft Exchange, when acting as a gateway between MS Mail postoffices, sets the Reply-To of all outbound messages to the MS Mail address of the Exchange user who is sending the message, or of the custom recipient sending the message if a custom recipient is defined for the originator of the message. This allows the recipient a reliable path back to the originator.

This behavior may not be wanted with SNADS addresses as custom recipients. When the recipient on MS Mail pulls up details about the originator of the message, the recipient gets only the Network/postoffice/Username portion of the address rather than the user's full SNADS address. The behavior in question does not cause any problems with message flow or directory synchronization. However, the behavior does not allow the recipient to determine who sent the message if the sender has the same name as another person in the e-mail environment.

For example, a customer has an Exchange Server computer (named SERVER1), which has an MSMI connecting to an MS Mail postoffice (named SERVER1/PO1), which has a SNADS gateway installed on it. The customer also has another Exchange Server computer (named SERVER2), which has an MSMI connecting to another MSMail postoffice (named SERVER2/PO1). All names from the SNADS postoffices and the MS Mail postoffices are synchronized into Exchange.

                                           MSMAIL      Exchange Server
  SNADS postoffices <-> SNADS GATEWAY <-> SERVER1/PO1 <-> SERVER1 <-----\
                                                                        |
                                                              Exchange MTA
                                                                        |
                                            MSMAIL      Exchange Server |
                                          SERVER2/PO1 <--> SERVER2 <----/

When these users are synchronized into Exchange, each receives a proxy- generated MS Mail 10/10/10 address. Assuming the connector postoffice name on SERVER1 is EXCHANGE, the first Bob receives an MS Mail proxy address of SERVER1/EXCHANGE/BOB, and the second Bob receives an MSMail proxy address of SERVER1/EXCHANGE/BOB2. (Assume that EUROPE/PARIS/BOB was imported first.)

Assume that the SNADS user Bob (EUROPE/PARIS/BOB) sends a message to an MSMail user named Mike on SERVER1/PO1. If Mike wishes to obtain information about the originator of the message, the details of the sender are given as the proxy-generated MS Mail 10/10/10 address of SERVER1/EXCHANGE/BOB, which does not convey the location information represented in the SNADS address.

STATUS

This feature is included in the latest Microsoft Exchange Server version 5.0 U.S. Service Pack. 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

MORE INFORMATION

In Microsoft Exchange Server version 5.0 Service Pack 2 and later, you can set a registry value to indicate to the MSMI that all messages outbound that were originated by a custom address with a target address of type SNADS are to be sent with the Reply-To set to the user's SNADS address instead of the user's MS Mail (PC) type address. MS Mail (PC) type address.

After setting this registry value, users who receive mail from a SNADS user and get details on that user's address will see the user's DGN/DEN SNADS style address instead of the user's proxy-generated 10/10/10. The downside to this is each MSMail postoffice must have the SNADS Access Component installed in order to reply to these messages.

To change the MSMI's behavior to send out the SNADS address as the Reply-To instead of the proxy-generated 10/10/10, do the following:

WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

For information about how to edit the registry, view the "Changing Keys And Values" Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" Help topics in Regedt32.exe. Note that you should back up the registry before you edit it.

1. Start Registry Editor (Regedt32.exe).

2. Locate the following subkey:

         HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services
         \MSExchangeMSMI\Parameters
   

3. Add the following case-sensitive DWORD value of 1:

         Send SNADS as Reply-To
   

4. Quit Registry Editor.

5. Stop and restart the Microsoft Mail interchange service.