A system for managing message distributions in multi-messaging system includes a server, at least one messaging request system and at least one messaging delivery system connected to the server. The server includes a message managing module which is programmed for receiving at least one messaging request from the at least one messaging request system, creating a message assignment for each messaging request, and sending each massage assignment to a corresponding massage receiving system. A related method is also disclosed. Utilizing the system and method can manage and maintain system messages in an unified way.