[exim] Quick/Simple question on setup...

Hi,
I'm sure this has been asked numerous times, so sorry if a repeat, but
would
someone mind sharing a simple configuration file/setup for this
scenario:
1) debian server running exim (serverA).
2) on ServerA, I'd like to send mail out through ServerA, like from
JavaMail to anyone in the world.
3) ServerA should NOT RELAY any mail from any host, even on my same
network.
4) ServerA is behind a firewall, that does not allow SMTP
communication to it
Thanks!
Joel