| 摘要 |
PROBLEM TO BE SOLVED: To provide a mail system for making a transmitter able to judge that the contents of mail are read by a receiver by making an electronic mail receiver notify information for judging whether or not a mail text is read to a transmission side as an evaluation function. SOLUTION: Receiver side equipment sends an opening notification to the transmitter in the case that the text display time of reception mail is fixed time or more or display is performed to the final character string of the text of the mail and notifies a preset message to a transmitter side in the case that the text display time of the mail is less than the fixed time. In the case that the reception mail is provided with an attached file or the like, the receiver side equipment performs control so as not to close the mail unless all the attached files are opened or sends the opening notification to the transmitter when the open time of all the attached files is the fixed time or more.
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