We need to know how to configure our access rules for our email server

for incoming/outgoing email messages. It's IP address is 10.11.112.15
and
is configured to run through a DNS server behind a firewall at
Calnet(T1
internet provider). It then looks for the addresses from the DNS
server.
Our public proxy is 10.11.112.14 and our private is 10.10.11.1. We
just
need a way to get email working properly on the email server with the

SMTP. We have a one to one NAT as well.
Our email client currently is Qualcomm's Eudora version 6. Thanks so
much,
GCA Computer Help Desk