ELECTRONIC MAIL SERVER, MAIL DISTRIBUTION SYSTEM AND MAIL DISTRIBUTION METHOD

摘要

PROBLEM TO BE SOLVED: To deal with illegal electronic mails which cannot be detected when electronic mails are distributed or received.SOLUTION: An electronic mail server 100 comprises a mail storage unit which stores distributed mails which are electronic mails distributed to a user terminal 200. The electronic mail server 100 also comprises a detection condition storage unit which stores detection conditions for detecting an illegal mail which is an illegal electronic mail. The electronic mail server 100 updates the detection conditions stored in the detection condition storage unit. The electronic mail server 100 detects an illegal mail from the distributed mails stored in the mail storage unit on the basis of the detection conditions updated after distribution of the distributed mails. The electronic mail server 100 notifies the user terminal 200 of a distribution destination to which the illegal mail has been distributed when the illegal mail is detected.