ELECTRONIC MAIL COMMUNICATION SYSTEM

PROBLEM TO BE SOLVED: To cancel any inconvenience due to the constraint of the use location of information terminal equipment by using a plurality of different communication environments, and to shorten the standby time of a user required for communication by shortening a communication processing time. SOLUTION: Electronic mail data are divided into first electronic data and second electronic data, and a the first electronic mail of the divided electronic data is transmitted and received through a first radio communication network 31, and the second electronic data are transmitted/received through a second radio communication network 32 different from the first radio communication network 31. Thus, it is possible to transmit those two respective electronic data through the optimal radio communication network based on the data size or data format or the like. COPYRIGHT: (C)2006,JPO&NCIPI