We are trying out Imail Express and I have question regarding the use of a firewall. Our main network is currently behind a firewall and it is intended that the Imail server will be placed outside with its static IP address.
Why do you want the mailserver outside of the firewall? Firewalls are designed to help keep your computers safe. You have the firewall, so I would recommend using it.
Should I rely on port blocking using TCP/IP filtering or should I install a McAfee or Norton personal firewall?
I wouldn't suggest McAfee or Norton, even if you do have to use a software firewall. They are *personal* firewalls. If you must keep the mailserver outside of the firewall, you might want to use a server-grade software firewall such as BlackIce Server.
We are only a very small office and we can t afford any more equipment. Is there a clever way of using our current hardware firewall without compromising the internal network?
Firewalls are designed for situations like this. For example, we have a firewall here that all traffic goes through -- no computer is outside the firewall. The firewall is set up so that any incoming packets to port 25 are allowed through. That way, incoming mail will reach the mailserver. You will need to open up other ports if you have other incoming traffic to the mailserver (110 for POP3, for example; see http://support.ipswitch.com/kb/IM-19980513-ES01.htm for all the ports that IMail may use, and see which of them you need).
-Scott
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