Bugs in Outlook that can result in all the files on your computer being deleted are no longer news. As of this writing, there is no fix for this bug. By Steven Vaughan-Nichols on ZDNet. September 25, 2001. Outlook, with it deep hooks into the operating system, will always have security problems.
Outlook is vulnerable by design.
If you want all that power to trade data and code with programs like Excel and Word, security is the price you pay. Even when good users and administrators patch their software, this only closes the barn door after the horses have fled. Eudora also still has its fans and can run on Windows PCs, Macs, and even Palms. The article concludes with advice on how to configure Outlook to be as safe as possible.