Mail Server Problem - Can't get port 993 opened

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http://forums.fedoraforum.org – I installed F17 the other day and I have everything working but, having problems with the Mail Server. The mail is flowing just fine but I can't access it from other computers on the network because I can't get port 993 for imap to open. I used the Firewall Configuration program from inside the GUI and it does show the entry Iptables to open the port but when I use nmap it does not show it as one of the opened ports. Any ideas? Thanks, Tom (HowTos)