Message client applications use the Messaging Framework architecture and installed MTMs to access messaging functionality.
Message client applications can be of various types, including:
Simple message-aware applications: These applications provide some messaging functionality, such as sending documents. The SendAs interface provides a simple messaging interface for use by such applications.
Inter-process communication applications: These applications use messaging to exchange data (for example with a server), without the user explicitly creating or sending messages.
Full-featured client applications: These applications provide complete access to messaging functionality.