| Class Summary | 
| ForwardLog | This class represents the log of forwarding addresses for a given user. | 
| PostAggregationPolicy |  | 
| PostClient | This class is a superclass for clients running on top
 of the Post object. | 
| PostClientAddress | This class represents the notion of an address, which
 uniquely identifies an application running on top of the
 POST service. | 
| PostEntityAddress | This class represents the abstract notion of the address
 of an identity in the Post system. | 
| PostGroupAddress | This class represents the abstract notion of the address
 of an group of users in the Post system. | 
| PostImpl | This class is the service layer which allows 
 Post applications to use Post functionality. | 
| PostLog | This class represents the Log which sits at the address of the user's
 PostUserAddress and points to the logs of other applications. | 
| PostUserAddress | This class represents the abstract notion of the address
 of an user in the Post system. |