Electronic-mail system for transmitting and receiving image data utilizing management of compatability transmission modes and capability information of destination terminals

摘要

An electronic-mail address and communication condition information associated with the address are stored in an address book in correspondence with each other. If a destination address is registered in the address book, before image transmission, a CPU receives communication condition information corresponding to the destination address through an address book management section and determines the transmission mode to the S or B mode on the basis of the communication condition information. When the transmission mode is the B mode, parameters representing the conditions of the image are determined on the basis of the communication condition information. The CPU transmits the image under the determined conditions.