| 摘要 |
PROBLEM TO BE SOLVED: To transmit the data to many receivers with no delay caused despite the absence of some receivers when such data as circular mails, etc., are successively sent to plural devices in a prescribed sequence. SOLUTION: A mail server 1 distributes a circular mail to the work stations 2 in a prescribed sequence. At the same time, the server 1 counts the time elapsed after the circular distribution. When the mail opening notification is received from a station 2 before the counted time exceeds a prescribed time, the server 1 sends the circular mail to the next station 2. If no mail open notification is received even after a prescribed time, the circular mail is also sent to the next station 2 when the prescribed time elapsed. |
