[Exim] Hi

Can anyone help me. I am new to linux and also Exim.

I have a host (firewall) that runs a mail server for local users, but it
also needs to passthrough mail to another 6 mail servers on the private
side. The problem is that the
mainlog fills up very fast due to messages like this lowest numbered mx
record points to local host.

According the exim faq
            hubbed_hosts:
               driver = domainlist
               transport = remote_smtp
               route_list = see discussion below
             other_hosts:
               driver = lookuphost
               transport = remote_smtp
But I dont entirely understand the statement, is the somewhere I can add
private i.p's to forward the mail to the servers under my firewall.

Many thanks if somebody can help

John Meyer
Namibia