| 摘要 |
PROBLEM TO BE SOLVED: To get access, from the outside, to an intranet system isolated with a fire wall. SOLUTION: Electronic mail is transmitted from the outside to a job processing engine 114 provided in a mail server 110 provided inside the fire wall. In the body text of the electronic mail, the identification information on a sender and job instruction information have been described. Regarding the received e-mail, the authentication is performed with a sender authentication part 115, the job instruction is acknowledged with a job acknowledgment part 116, and the job is executed with a job execution part 117. The execution result of the job is transmitted by return e-mail or a fox to the sender.
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