Relay IP address ranges - NEWBIE

[Stephen Froehlich]

Config:
RedHat 7.1
qmail - 1.0.3
daemontools-0.70
dot-forward-0.71
ucspi-tcp-0.88

I'm having a helluva time figuring out how to allow my local hosts to relay
mail through the server.  I put the proper line in hosts.allow (per the
FAQ), however, I'm not familiar enough with xinetd to do the other edit in
5.4.

In other words, I'm lost - help?