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Step 1
Know that unlike Outlook, the Microsoft email program called Outlook Express does not let you back up the "Blocked Senders" file within the program. You must do this through the Windows Registry.
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Step 2
Choose "Start" and click on "Run." Type "regedit" in the open box. Click "OK."
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Step 3
Locate the registry key, HKEY CURRENT USER\Identities. Click on the subkeys to find your correct username.
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Step 4
Choose the registry subkey for your identity. Select "HKEY CURRENT USER\Identities\(Identity Number)\Software\Microsoft\Outlook Express\5.0\Block Senders."
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Step 5
Open the registry menu and click "Export Registry File."
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Step 6
Change the location for this backup "Blocked Senders" file to your desktop in the "Save in" box. Type "blocked senders reg" and save. Exit the registry menu.
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Step 7
Copy the "Blocked Senders" registry key file on your desktop to another location for safekeeping. Options include removable media, such as a CD or thumb drive, or another partition on your computer.













