configure mcafee desktop firewall

Hi,
I am looking to configure mcafee desktop firewall 8.5 for an intranet. I need to block some external traffic (for eg. mail servers). I have a list of trusted hosts in the intranet.
The firewall works fine with the list of trusted hosts, blocking everything else.

The problem is, I have to configure the firewall for the intranet without using the list of trusted hosts and still block the untrusted sites such as yahoo mail, etc.

Is there any way to do this? I am not sure but can I use the audit or learning mode to setup the firewalls rules automatically? Please suggest if there is a way.

Any help will be highly appreciated.
Thanks