Scott Hanselman has posted an article on how to hack the registry to unblock file types in outlook. While this is effective, I find it frustrating to have to go into the registry to get a file attachment to show up; especially if it is temporary. A while back I found this Outlook add-in tcalled "Outlook Permissions Add-in" that really rocks. It allows me to change a setting then easily change it back when I want the protection (great if you have kids that lurk near your PC). Best of all its free!
Here's a screen grab:
What do you think? Are there other add-ins that do the same thing? Let me know!