Abstract: Aspects of the invention relate to a computer-implemented method of controlling a computer application program in a computer system configured for electronically communication with a client. The computer system is configured to have access to a first request set of one or more allowable requests corresponding to a first application state of the computer application program. The computer application program may run on the computer system or on one or more other computer systems. A client request is received at the computer system for the computer application program. The computer application program is in the first application state in relation to said client (using e.g. the client connection). The client request is analysed to determine if the client request matches one of the allowable requests corresponding to the first application state of the computer application program.

Abstract: A method and system for reducing the proliferation of electronic messages is disclosed. An electronic message or a portion thereof is transmitted by the server system. A spam notification signal may be received related to the electronic message or the portion thereof. Access to said electronic message is restricted solely in response to receiving the spam notification signal.