A method, server, device and computer readable medium for facilitating communication between users permitted to access a messaging server is provided. The messaging server comprises a user database, a processor and memory. The user database is configured to store user information for the users and at least one name directory. The name directory includes a list of users permitted to communicate with each other. The memory has stored thereon instructions which, when executed by the processor, cause the messaging server to transmit the name directory to the users listed therein at predefined times.