firewall ports not working

[Eric Wagar]

>Looks like it should allow traffic on port 25. If you switch down
>iptables by running "service iptables stop" you are able to connect to
>Postfix by using telnet to port 25 from another host? With iptables on
>you can only reach port 25 on localhost?
>
Well, I can connect to 25 from a system on the same subnet as the server 
using postfix.  But, once I am outside that subnet, I can't reach 25, 
nor do I get any type of denial message in the /var/log/maillog.

And, from what I read in the main.cf, it looks as though postfix is 
quite open by default.

regards
eric