If you want (REALLY WANT :-) to change the Outlook file attachments security levels (i.e. to read e .exe file attached to a received email), and you know how to use the regedit.exe tool, you can follow the procedure below:
- Go to HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Security
- Create a new string value called Level1Remove
- Enter in the file extensions you want to use, such as .exe or .bat
- You can have multiple file types separated by a semicolon like this: ".exe;.com"
- Close and open outlook.
To avoid risks, I suggest to keep the string "Level1Remove" in the registry ONLY for the strict necessary.
More info on .NET Atlanta Regular Guys blog.