5. A method of accessing and controlling a server-administered function on a server located remotely from a network controller of a text messaging system, the server connected to the network controller through a communications network and wherein the server-administered function provides a user with a service when the user communicates a registered identity associated with either the user or a device used by the user to compile a text message, the method comprising: at the network controller, receiving over the communications network multiple text messages that each contain a recipient address and a sender address; using control logic to make an assessment about each of said received text messages to identify a relevant message that refers to the registered identity, said relevant message being a text message that includes a self-addressed routing direction that includes common recipient and sender addresses, wherein presence of the self-addressed routing direction in the text message confirms the registered identity and wherein the recipient address includes a mobile number of the sender address; causing the network controller to communicate at least part of the relevant message to said remotely located server; deriving an instruction from each relevant message, the instruction relating to the service; and at the server, invoking the server-administered function for said desired service based at least in part on the instruction derived from the relevant message, and through the device used to compile the text message with the self-addressed routing direction, controlling execution of the desired service on the server, the text message further including a body portion containing the instruction, wherein information relating to the desired service provided by the server is returned to said device via the network controller.
6. The method of accessing and controlling a server-administered function according to claim 5 , wherein the step of invoking the server-administered function is triggered by the text message having a self-addressed routing direction.