In a printer connected to a network, a mail server, having an address inherent in the printer, for transmitting/receiving an electronic mail is arranged. The electronic mail received by the mail server is decoded by a mail process unit. When an electronic mail sentence includes a control instruction...http://www.google.com/patents/US20020143924?utm_source=gb-gplus-sharePatent US20020143924 - Printer, control method, and computer readable recording medium which stores printer control program