ELECTRONIC MAIL SYSTEM AND ELECTRONIC MAIL REPLY PROCESSING METHOD

PROBLEM TO BE SOLVED: To provide a technique for a mail system capable of quickly transferring a reply to an address specified in a Bcc field by a mail server.SOLUTION: The electronic mail system includes a mail server for performing reply processing to electronic mail of which header information includes an address specified as Bcc. When an address specified as Bcc is included in the header information of electronic mail, the mail server stores a message ID in the electronic mail and the address specified as Bcc in association with each other in a database. The mail server analyzes the header information in a time of receiving electronic mail and, when the electronic mail is reply mail, transfers the reply mail to the stored address specified as Bcc in association with the message ID.