I'm working as a network administrator in a government organization. We are operating 15 email accounts which are purchased from a private domain provider to my organization so we can communicate with the business world.
We are going to plan to allocate individual mail accounts to all 500 employees working in the company, so we want to maintain our own mailserver (MS Exchange Server 2007) in our company.
What are the pre-requisites and infrastructure to do this? If we purchase a static public IP, how can I configure the Exchange Server? What are the do's and do not's. Thanks!