Importance

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Abstract

Identification information, access information indicating that a main body of a mail message has not been accessed nor read at a destination terminal, information about the sender, information about the receiver, time and date information, and subject information each collated to each other is stored and managed as a transmitted mail managing information in a mail box. When a mail message is transmitted, a transmitted mail message including a return mail program actuated to return a response, when the transmitted mail message is accessed and read at the destination terminal, an acknowledgement that the transmitted mail message has been accessed and read and identification information for the transmitted mail message as a returned mail to a server. When information as to whether the transmitted mail message has been accessed and read or not is obtained from the received return mail message, the identification information is extracted from the received return mail message and the access information for the transmitted mail message corresponding to the identification information is changed to information indicating that the transmitted mail message has been accessed and read.

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First Claim