Abstract: A system for, and method of, generating an alias source address for an electronic mail (“e-mail”) message having a real source address and a destination address and a computer network, such as the Internet, including the system or the method. In one embodiment, the system includes an alias source address generator that employs the destination address to generate the alias source address. The system further includes an alias source address substitutor that substitutes the alias source address for the real source address. This removes the real source address from the e-mail message and thereby renders the sender, located at the real source address, anonymous. Further-described are systems and methods for forwarding reply e-mail and filtering reply e-mail based on alias source address.

Abstract: A system and method for managing time and expense when communicating between a host and multiple network connections. A server program, inserted between an information requesting device and the network connections, reconfigures the information requesting device forcing the information requesting device to pass all requests through the server program. The server program then determines what type of network is being connected. Additionally, the server program makes costs visible to the user, warns the user when pre-specified budgets are exceeded, postpones actions to a later time when conditions are met, and automatically adapts user customization and system configuration values to the changing conditions of use. This allows asynchronous style browsing in which users can work disconnected from a cache of documents or trade off communication cost against information needs.