Run Regedit, and go to this key:
HKEY_CURRENT_USER\Software\Microsoft\Office\10.0\Outlook\Security (change 10.0 to 9.0 for Outlook 2000 SP3 or to 11.0 for Outlook 2003`fs)
Under that key, add a new string value named Level1Remove.
For the value for Level1Remove, enter a semicolon-delimited list of file extensions. For example, entering this:
mdb;url
would unblock Microsoft Access files and Internet shortcuts.
If you are using this registry entry, a glance at Help | About Microsoft Outlook will show Security Mode: User Controlled above the license information.
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Because Microsoft has not forced attachment blocking on Outlook Express (though it is optional in OE 6.0), you can access .exe files from Outlook messages imported to OE. To make this process easier, consider creating a separate folder in Outlook to which you copy messages with attachments that you want to import. To import into OE, use OE's File | Import command.
Right now, you occupy a point where three lines reach across the expanse of time and space and intersect only there, and that you and only you possess.