We’re about to delve into the Windows registry. Please move along if you don’t know what the registry is or have never dabbled with it before. It’s a dangerous place — once false move and your PC will explode.
The fix will also reduce Outlook security settings. That’s not a problem for someone with reasonable IT knowledge, but it’s not for everyone.
Still here? OK, here’s what you do:
1. Close Outlook2. Run regedit.exe Navigate to:
Where XX.X indicates your version of Outlook:
14.0 for Microsoft Office 2010 12.0 for Microsoft Office 2007 11.0 for Microsoft Office 2003 10.0 for Microsoft Office 2002 9.0 for Microsoft Office 2000
3. Create a new valueCreate a new string value key in that location named:
Click OK to save the value then exit regedit.
5. Restart Outlook The attachment should be magically unblocked. Try rebooting if that’s not the case. Microsoft provide a useful support page with alternative options and configuration advice for those using Exchange Server.