MAIL TRANSMISSION SYSTEM, MAIL SERVER, MAIL TRANSFER SYSTEM, MAIL TRANSFER METHOD, MAIL TRANSMISSION METHOD, MAIL DELIVERY METHOD, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a mail transmission system, a mail server, a mail transfer system, a mail transfer method, etc., by which a large quantity of electronic mails can be quickly transferred. SOLUTION: A server 10 on the transmitter side classifies electronic mails which should be transmitted on the basis of domain names obtained from mail addresses of destinations and collects data of electronic mails with respect to each domain name to generate data for transfer and transfers this data for transfer to a server 30 of a deliverer corresponding to the domain name by FTP. Compression of data for transfer is effective at this time. The server 30 of the deliverer receives data for transfer and decomposes data for transfer to generate data of each electronic mail and delivers it to the mail box of each receiver.