In order to utilise a Managed Exchange service, you need:

a)         a reasonably modern computer (preferably Pentium III or later with a minimum 128 MByte memory), and

b)         a good internet connection, preferably broadband.

If you have low mail traffic and are not reliant on sharing too much Public Folder data, then you can get away with a dial up connection. Outlook and Exchange  2003 are designed to work efficiently over slow or high latency connections. However to take full advantage of Exchange’s sharing and collaboration features it’s highly recommended that you have at least a DSL/ADSL-type connection to the internet.