A digitized postal service system forwards users' correspondence as digital documents using a network over the territory served by postal services. The system includes informatics “server” units which manage the correspondence to and from the users in a geographical area, informatics “router” units capable of interconnecting various server units, and informatics units known as “internal modules” allocated to the site of each user and provided with software and hardware for managing the data. The informatics units include first memories for the registration of correspondence files and a database containing details of the users, a third memory registering a private encrypting/decrypting key reserved for the user of the memory, and software capable of reading from and writing to the memories and formatting the outgoing correspondence. Also included are devices that transfer the correspondence from and to the internal module of each user to and from the relevant server.
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