@home and news servers

I have a small question that is bugging me. Whenever I setup a system
(linux or win) and connect it directly to @home using their DHCP servers,
entries in mail and news programs such as "mail" and "news" work flawlessly.
When I connect a network using a linux or linksys firewall that grabs
IP/gateway/DNS information from @home's DHCP servers and passes the exact
same DNS server IPs, the @home "news" and "mail" aliases will not work.
What is causing this?

John Albee
guesswho911@home.com