Mailbox

An area on a storage device where email is placed. In email systems, each user has a private mailbox. When the user receives email, the mail system automatically puts it in the appropriate mailbox.

A folder that contains messages.

The combination of an Active Directory user object that has mailbox attributes and the associated mailbox data that is stored in the mailbox database. [Exchange 2007]

The delivery location for incoming messages. [Exchange 5.5]