EMSMDB or Exchange Transport Provider

1) What is known as "EMSMDB" ?

EMSMDB refers to the Exchange transport provider, EMSMDB32.

One example of a provider is EMSMDB2, the "Electronic Messaging System Microsoft Data Base, 32 bit build" provider. EMSMDB implements both a transport and a message store and, as such, is a dual provider.

The transport is the ability to submit messages to Exchange Server; the message store is the ability to read (and possible write) messages to an Exchange store process.