How to Unblock Attachments in Outlook 2007 OWA

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How to Unblock Attachments in Outlook 2007 OWA
You can stop Outlook 2007 from blocking attachments. (laptop with e-mail blue image by patrimonio designs from

The Outlook 2007 application is automatically configured to block certain types of attachments that it deems potentially unsafe for the security of your computer. If you want to bypass this protection of e-mail attachments, you can manually edit your computer's registry and unblock specific file types. The changes you make to the registry on your computer will carry over to both Outlook 2007 and Outlook Web Access, also known as OWA.

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Things you need

  • PC running Windows XP or later
  • Microsoft Outlook 2007

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  1. 1

    Quit the Outlook 2007 program if it is currently open.

  2. 2

    Open the Start menu and click "Run."

  3. 3

    Type "regedit" into the field that appears and hit "Enter" to launch the Registry Editor tool.

  4. 4

    Navigate to the HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Security directory.

  5. 5

    Open the "Edit" menu, go into the "New" submenu and select "String Value."

  6. 6

    Enter "Level1Remove" as the name of the new string value.

  7. 7

    Right-click on the new string value and choose the "Edit" option.

  8. 8

    Enter the types of file extensions (a period followed by three or more letters) that you want to unblock in Outlook 2007. Separate different file extensions with a semicolon. Press "OK" when you are done.

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