recipient

An Active Directory object that is mail-enabled, mailbox-enabled, or that can receive e-mail messages. A recipient is an object within Active Directory that can take advantage of Exchange functionality. [Exchange 2003]

A mail-enabled object in Active Directory to which Exchange can deliver messages. In Exchange 2007, recipients include mailbox users, mail users, resource mailboxes, mail contacts, distribution groups, and dynamic distribution groups. All recipients have Exchange attributes, but they may or may not have Exchange mailboxes. [Exchange 2007]

In the directory, an object that can receive messages and information. Recipients are mailboxes, distribution lists, custom recipients, and public folders. [Exchange 5.5]

The switch or network to which a subscriber's directory number has been ported. [T1.711-1999]