[ale] which port/services to enable under SmoothWall ?

[courtneycthomas at bellsouth.net (Courtney Thomas)]

Sorry for the previous confusion regarding SECURE internet browsing and
email... as LAN clients.

I would like to know..... what are the minimum ports/services are required
to be open, maximizing security, while allowing said activities, i.e. which
ones should be enabled  ?

Finally, how should this be implemented, under SmoothWall or otherwise  ?

Thanks once more,

Courtney