A collaborative communication system is disclosed. The collaborative communication system allows registered user to share a file with online or offline users by sending the file to a store remotely located with respect to a client machine being used by a sender. Each of the registered users is assigned an identifier that is not in form of the traditional email address. A designated recipient receives a notification of the availability of the file when the recipient logs into the system, where the delivery of the notification is based on the identifier of the recipient. The designated recipient may access the file whenever it is deemed convenient.