Exchange Server, the Microsoft messaging and collaboration
server, is software that runs on servers that enables
you to send and receive electronic mail and other
forms of interactive communication through computer
networks. Designed to inter operate with a software
client application such as Microsoft Outlook, Exchange
Server also inter operates with Outlook Express and
other e-mail client applications.
E-mail messages are sent and received through what
is commonly referred to as a client device such
as a personal computer, workstation, or a mobile
device including mobile phones or Pocket PCs. The
client typically connects to a network of centralized
computer systems comprised of servers or mainframe
computers where the e-mail mailboxes are stored.
The centralized e-mail servers connect to the Internet
and private networks where e-mail messages are sent
to and received from other e-mail users.