MAPI (Messaging Application Programming Interface) is a Microsoft messaging architecture used primarily for communication between email clients and servers. MAPI itself does not handle electronic signatures; however, it provides the infrastructure for email clients to enable digital signatures and encryption for messages.
The process of applying an electronic signature on an email message involves using a digital certificate with a key pair (public and private key). The sender signs the message with their private key, which is then verified using the sender’s public key by the recipient. MAPI-compatible email clients can implement this process by integrating with a digital certificate provider, such as Microsoft Certificate Services.
MAPI also supports placing an encrypted message into a secure envelope that can be opened only by the intended recipient. This process involves exchanging digital certificates between sender and recipient and using the recipient’s public key to encrypt the message.
Overall, MAPI provides the framework for email clients to handle electronic signatures and encryption through the integration of digital certificate providers and the use of public and private key pairs.
