This Recommendation defines the usage of the X.400 protocols, mainly the Interpersonal Messaging protocol (P2) and the Message Transfer protocol (P1), to provide a global COMFAX service. The COMFAX service, as defined in Recommendations F.162 (1992) and F.163 (1992), specifies a store and forward facsimile service where MHS may be used to provide a means of moving facsimile messages in COMFAX services.