For some people, I am completely certain it's important to make sure certain types of email attachments never make it through the email client to the end user's machine. But I am - after all - a technically-savvy person (and I can spell savvy), so I want (well, actually need) to be able to receive a lot of the kinds of files that Microsoft Outlook seems to think I shouldn't be able to get at.

Enter OL2K2SEC (an Outlook 2003 version is also available, for all you acronym decoders who have not yet clicked). Sure, you could edit the registry, but frankly I have better things to do with my time, I deal with too many computers, and I might need/want to enable someone else to do the same thing on their computer (and I am leary to direct most people to edit their registries). Not for everyone, to be sure, but great for those who need it.