By default Outlook “secures” users from suspicious attachments (e.g.
*.bat) by blocking access to them and leaving no possibility to bypass this security measure via options. It can however be sorted out by editing the system registry.
Here is what you need to do:
- Close all Outlook windows.
- Run the Registry Editor.
- Locate the key
XXvaries depending on the Office version installed).
- From the Edit menu pick New → String Value.
- Name the new value
- Double-click the new value and enter a semicolon-separated list of extensions you want to unblock (e.g.
.exe;.bat;.url) in the Value data field.
- Close the Registry Editor and run Outlook. Attachments with the extensions you named in step 6 shouldn’t be blocked any more.
I found the above solution at HowTo-Outlook.