The Mail-Recipient object is an abstract object, which means you cannot create an instance of this object directly. It is inherited by other objects to which you can send mail, including the Distribution-List, Mailbox, Public-Folder, and Remote-Address objects.
Multiple Mail-Recipient objects can be represented by (or contained within) a single Distribution-List object.
Because Mail-Recipient objects appear to MAPI as messaging user objects, use the MAPI IMailUser interface to access a Mail-Recipient object.
For more information on accessing Mail-Recipient objects through MAPI and through directory access functions, see Using MAPI with Directory Objects and Implementing Address Lookup Functions.