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WhichAddress for MS Exchange 2000/2003

Updated: 8-March-2013
See also:   
WhichAddress for Exchange 2010
WhichAddressPF for Exchange 2000/2003

An Exchange 2000/2003 mailbox may have multiple SMTP addresses assosiated with it. For example, John Doe has a mailbox with a primary SMTP address of and secondary SMTP address of As Outlook always resolves both SMTP addresses to a mailbox name, there is no way to see what address the message was originally sent to. The only known workaround is looking through message envelope headers (open a message > View > Options...). Suppose John Doe would like to set a rule to put any emails sent to to a separate "JohnD-Inbox" folder. When he tries to set the rule, it does not work because of address resolving.
WhichAddress for Exchange 2000/2003 application allows a user to see which address the message was originally sent to and set up a rule to separate the messages being sent to different SMTP addresses.
The application is an Exchange store event sink.



On your Exchange 2000 Server computer:
1. Create a new mail-enabled user account and make sure it's mailbox alias is WATEST
WhichAddress installation 1 WhichAddress installation 2
2. Add the additional SMTP address
WhichAddress installation 3
3. Select (or create) user account that is a member of the local Administrators, Domain Admins, Domain Users and Exchange Domain Servers security groups.
That account must have full permissions on the mailbox store. Open ESM (Exchange System Manager) and drill down to the mailbox store in question. Now open the properties and select the Security tab. Add your account and allow full control.
See also these MS articles:
Exchange 2000 Permissions Required to Configure an Event Sink
How to Get Service Account Access to All Mailboxes in Exchange 2000
How to Assign Service Account Access to All Mailboxes in Exchange Server 2003
4. Log on as that user.
5. Create C:\Program Files\WhichAddress\ directory.
6. Download archive file to C:\Program Files\WhichAddress\ directory and extract all files.
7. Run C:\Program Files\WhichAddress\WhichAddressSetup.exe
8. Check Install COM+ object checkbox. Place the #3 account name (using <domain>\<account> syntax) and password in the appropriate fields. Click CHANGE button.
WhichAddress installation 4
9. Select in the first (upper) list the WATEST mailbox and check Register in the following Mailboxes checkbox. Click CHANGE button. (THIS DEMO VERSION SHOWS ONLY *TEST* MAILBOXES - see "About this demo version" below.) WATEST mailbox will be placed in the second (lower) listbox.
WhichAddress installation 5
10. Click Exit button.


1. Open any SMTP/POP3 e-mail client (for example, Outlook Express) and send two messages to and
2. Using Outlook, open WATEST mailbox. Make sure the messages you just sent exist in the Inbox folder.
WhichAddress testing 1
3. Open View menu. Select Current View > Customize Current View...
WhichAddress testing 2
4. Click Fields... button. Select All mail fields from the list on bottom left corner of the form. Select E-mail account and Categories fields in the Available fields: list and press Add button.
WhichAddress testing 3
Click OK button to close Show Fields window. Click OK button to close View Summary window.
5. Look at E-mail account and Categories columns. Note you can sort on E-mail account.
WhichAddress testing 4
6. Create a subfolder WATEST1 under Inbox folder. Select Tools menu > Rules Wizard and create the following rule: "Apply this rule after the message arrives assigned to category move it to the WATEST1 folder"
WhichAddress testing 5
7. Open Outlook Express and send a message to
8. Check if the message has been moved to WATEST1 folder in Outlook.
WhichAddress testing 6

I have tested WhichAddress with Outlook 2002 and Exchange 2000 SP1/SP2/SP3 on MS Windows 2000 Advanced server.
It also can run with Exchange 2003 server on Windows 2003.


1. Start C:\Program Files\WhichAddress\WhichAddressSetup.exe
2. Select all strings in the second mailbox list and mark Unregister from the following mailboxes checkbox.
3. Mark Uninstall COM+ object checkbox.
4. Press CHANGE button. After uninstallation is complete, press Exit button.

About this demo version.

WhichAddress demo version works only for mailboxes whose names include "TEST". Examples:
Other mailboxes are unavailable. Also you can not register this demo version for all maiboxes at once (store-wide). Full product version has no limitations.


Q. If I manage to apply WhichAddress to the whole Information Store, is WhichAddress then automatically applied to future users and mailboxes that are created?
A. Definitely yes.

Q. I am about to purchase this product but I wondering regarding updates/patches. What are the policies regarding updates? Do you provide them freely or as a purchase?
A. As a registered user, you will get free updates for one year from the date of purchase.
Once the new version is ready, this information will be e-mailed to all registered users. We will send updates via e-mail to those who request them.

Q.  I have already ordered your software and want to view data relating to my order.
A.  Just visit our Customer Care Center.

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