MAPI stands for Messaging Application Programming Interface. It is a Microsoft-designed messaging architecture that allows developers to create messaging applications that can send and receive electronic mail, and manage other messaging-related tasks such as calendaring and address books. MAPI is commonly used by Microsoft Outlook, but it can also be used by other applications like Microsoft Word, Excel, and Access. MAPI provides a standardized way for these applications to communicate with messaging systems, regardless of the underlying mail transport system being used.
