Newbie Setting up External Emails

Hi,

I am new to the Astaro Gateway and i am using it for a small business. I have set it up to allow internet access across the network of 12 computers.

I now wish to allow external email access to all users. Currently running exchange 2003 configured only for internal email. We have purchased a domain name and would like to receive external and internal email to our outlook clients. I have the Mail security option enabled within astaro V8. I have followed MOST of the sticky thread within this forum and have configured the astaro to allow email access.

This now allows me to telnet to my domain name through port 25, which was previously failing.

I have some questions please.

My server has never been used to send or receive external email. Do i still need to configure exchange 2003 for external email or will the Astaro deal with it for me?

Also when i need to amend my MX record within my domain CP, what is my Astaros FQDN? Am i right in thinking if i run a ping -a command on the ip address of the astaro it will resolve the FQDN name?

Many thanks for your help.

Clive.