If you are using the classic Outlook desktop application and frequently need to receive restricted files, you can modify the registry to allow specific extensions.
To unblock attachments in Outlook, you can either use quick workarounds like renaming files or advanced methods like editing the Windows Registry. Outlook automatically blocks specific file extensions (such as , .js , or .bat ) to prevent potential malware from executing on your computer. Quick Methods to Bypass the Block outlook unblock attachment
: HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Security If you are using the classic Outlook desktop