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IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows Registry

SUMMARY

This article describes how to back up and restore your Blocked Senders list and other mail rules in Outlook Express 5 and later. If multiple Identities are in use for Outlook Express, these steps should be repeated for each Identity, and the backup data segregated accordingly. This will facilitate restoration of each Identity.
MORE INFORMATION
WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
How to Back Up Blocked Senders List and Other Mail Rules
The Blocked Senders List
  1. Click Start, and then click Run.
  2. In the Open box, type regedit, and then click OK.
  3. Locate and click the following registry subkeys (save each key to a different file):

    HKEY_CURRENT_USER\Identities\{Identity Number}\Software\Microsoft\Outlook Express\5.0\Block Senders

  4. On the Registry menu, click Export Registry File.
  5. In the Save In box, change the location to your desktop.
  6. In the File Name box, type blocked senders.reg (for the Block Senders key), and then click Save.
Other Mail Rules
  1. Click Start, and then click Run.
  2. In the Open box, type regedit, and then click OK.
  3. Locate and click the following registry subkeys (save each key to a different file):

    HKEY_CURRENT_USER\Identities\{Identity Number}\Software\Microsoft\Outlook Express\5.0\Rules\Mail

  4. On the Registry menu, click Export Registry File.
  5. In the Save In box, change the location to your desktop.
  6. In the File Name box, type mail rules.reg (for the mail rules key), and then click Save.
  7. On the Registry menu, click Exit.
NOTE: For additional protection, copy the registry key files from your desktop to any of the following locations:
How to Restore the Existing Blocked Senders List and Other Mail Rules to Function on the Newly Installed Operating System
  1. Open Outlook Express on the new computer, and complete the Internet Connection Wizard to set up your Identity and account information. If you had multiple identities in the previous installation, complete these steps for each Identity. To do this:
  2. Click Start, and then click Run.
  3. In the Open box, type notepad.exe.
  4. Click Open on the File menu, and then locate the Block Senders.reg file that you created.
  5. In the second line of text, select the text after "HKEY_CURRENT_USER\Identity\" that includes the braces {}. On the Edit menu, click Copy to copy this text to the Microsoft Windows Clipboard.
  6. On the Edit menu, click Replace. Click your pointer in the Find what box, and then click Paste on the Edit menu to paste the text into that box. Do not close the Notepad application until you are directed to do so later in this process.
  7. Start Registry Editor on the new computer (as in step 1 of "The Blocked Senders List" section), and locate the HKEY_Current_User\Identities folder. Double-click the User ID key in the right pane, and then click the Value data.
  8. Press CTRL+C to copy that value to the Windows Clipboard. Click Cancel to close the Edit String dialog box, and then close Registry Editor.
  9. In Notepad, click your point in the Replace with box, and press CTRL+V to paste the text. Click Replace All to replace all instances of the text strings.
  10. Scroll through the entire list to make sure that all registry keys have the new text string, rather than the old string. On the File menu, click Save, and then close Notepad.
  11. Double-click the Block Senders.reg file, and then click Yes when you are prompted: "Are you sure you want to..." to import the Block Senders list to the registry for the new computer.
  12. Follow steps 2 through 11 above on the mail rules.reg file to update that file with the new Identity information.