outlines the background and development of the messagerie service, beginning with its origins linked to the University of Paris and evolving through royal intervention and reform. He discusses the various management regimes over the years, including the challenges faced by the current company managing the service, particularly in terms of adapting to changes in traffic, customer expectations, and efficiency amid financial constraints. Moreover, he emphasizes the necessity of maintaining a privileged status for messageries to ensure reliable service against private carriers that may offer less regulation and security. By analyzing the structure, responsibilities, and privileges of the messaging service, Durdan advocates for its continuation and suggests improvements that would benefit both the public and the state. (This is an automatically generated summary.)