The application has miniscule interface with options to add and remove file types from Allow and Block lists. Before you launch it, make sure that you’re not running any instance of Outlook in background. You can either manually specify the extension you wish to allow or choose file types from Block list and add them to Allow list. By default, it doesn’t unblock link attachments, however you can enable Allow access to link attachments option.
Now Click Apply and close the window before launching Outlook. The next time you receive blocked attachments, Outlook, in spite of blocking the attachments, will let you access and download them.
It works with all versions of Outlook, including the latest Outlook 2010.