Unblock Attachments in Outlook 2010

Unblock Attachments in Outlook 2010

https://www.howto-outlook.com/faq/blockedattachments.htm

1. Make sure Outlook is closed.
2. Open the Registry Editor;
   • Windows Vista, Windows 7, Windows 8 and Windows 10
     Start-> type; regedit
   • Windows XP
     Start-> Run-> regedit
3. Locate the following key
   • Outlook 2000
     [HKEY_CURRENT_USER\Software\Microsoft\Office\9.0\Outlook\Security]
   • Outlook 2002
     [HKEY_CURRENT_USER\Software\Microsoft\Office\10.0\Outlook\Security]
   • Outlook 2003
     [HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Outlook\Security]
   • Outlook 2007
     [HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Security]
   • Outlook 2010
     [HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\Security]
   • Outlook 2013
     [HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\Security]
   • Outlook 2016
     [HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Security]
4. Go to Edit-> New-> String Value and name the value Level1Remove (case sensitive!)
5. Double-click on the newly created value and enter the extension including the “dot” that you want to open in Outlook. For instance .exe
   If you need to enter more than one extension you’ll have to type separate them by a semicolon like this; .exe;.bat;.url
6. Press OK on the input box and close the registry editor
7. When you open now Outlook, the attachments which hold those extensions aren’t blocked by Outlook anymore.

To let Outlook block those extensions again follow the instructions again but instead of creating the Level1Remove value delete it.