Thanks for your reply. Below are the commands you have asked for. Looks like everything is ok. From work today I was able to telnet and get a response on port 110 from the Dovecot server. So I believe that the forwarding is working.
Do you need me to post my postfix config file?
Code:
[root@clark ~]# netstat -tulpn | grep :25
tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN 15775/master
[root@clark ~]# netstat -tulpn | grep :110
tcp 0 0 :::110 :::* LISTEN 15808/dovecot
[root@clark ~]# iptables -L -n
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination