Chapter 7: Connecting Exchange

Chapter 7: Connecting Exchange

Overview

A messaging system that's only able to communicate internally or with other systems of the same kind isn't much use in today's heterogeneous world. This chapter reviews the methods an Exchange server can use to connect to other electronic messaging systems.

The growing set of Exchange connectors

Connectors are the components that provide links between the Exchange MTA and other messaging systems, normally over an intermediate network connection. Two types of connectors exist?site connectors and external connectors. When Exchange V4.0 was first released Microsoft limited the number of connectors provided in the standard edition, forcing people who wanted to connect to almost any other system to a separate purchase of the necessary connector. The licensing philosophy has greatly changed since and the standard edition now comes fully equipped with connectors for sites, the Internet, Microsoft Mail, Lotus Notes, and Lotus cc:Mail. Separate purchases are only required if you want a connector for X.400, IBM PROFS, or IBM SNADS. All available connectors are bundled into the Exchange Enterprise edition.

Options to connect sites

As the name implies, site connectors are used to send messages between one Exchange site and another within a single organization. In fact, four different connectors can be used to link sites together:


	?	Direct site connector (also called the site connector)


	?	X.400 connector


	?	Internet Mail Service (called the Internet Mail Connector in Exchange V4.0, and often shortened to the IMC or IMS)


	?	Dynamic Remote...

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