You can administer Commtouch Zero-Hour Virus Protection configurations by domains through the IMail Administrator at Domain > Commtouch Zero-Hour.
Note: Virtual domains cannot be configured and will default to the primary domain configuration settings.
Use this page to enable Commtouch Zero-Hour scanning and set classification type actions on affected files as follows:
Also available within all classification types, is the capability to prefix the subject line for delivered messages.
For more information please see the IMail Administrator Help.