MSMQ MAPI Transport Provider

Any messaging application programming interface (MAPI) client can send and receive MAPI messages using the MSMQ MAPI transport provider.

The MSMQ MAPI transport provider differs from the MSMQ Exchange connector in the following ways:

• The MSMQ MAPI transport must be installed on each MAPI client to allow the client to send and receive messages over MSMQ. In contrast, the MSMQ Exchange connector needs to be installed on only one MSMQ server within a site.
• The MSMQ MAPI transport provider enables any MAPI client to send and receive MSMQ messages, whereas the MSMQ Exchange connector enables only Microsoft Exchange clients to send and receive MSMQ messages.
• Every MAPI client has its own MSMQ queue for incoming messages created by the MSMQ MAPI transport. In contrast, Microsoft Exchange clients receive messages from MSMQ through one queue used by the MSMQ Exchange connector.
• It is more difficult for a group of MAPI clients using the MSMQ MAPI transport to share addresses of MSMQ queues. Each MAPI client must store the queue addresses in its own Personal Address Book (PAB). Conversely, Microsoft Exchange clients can obtain MSMQ queue addresses from the shared Exchange Address Book.

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