The article describes on how to check version of SMG
Symantec Messaging Gateway
Please do following to verify the version of Symantec Messaging Gateway (SMG) software:
1. Open web browser application (e.g. Firefox, Chrome etc.)
2. Enter following URL: https://SMG-IP-address
3. You should be presented with login screen, please note general version number:
4. If more detailed version number is needed, please login.
5. After logging in, detailed version number will be displayed in System Status section of SMG Dashboard: