What is a MAPI client?
The short answer is that MAPI is an accepted standard for e-mail exchange, newer than the POP3 standard that is currently used by most ISPs. MAPI stands for Messaging Application Program Interface; a Windows program that lets you interact with your e-mail while in various Windows applications. It’s a messaging structure or standard that helps enable various software programs and platforms to interact with a variety of messaging systems seamlessly.