Patent ID: 8621013
Filing Date: 2013-12-31
Classification: H04L

Abstract:
1. A relay server connected to a mail management server that saves mails for saving and, in response to a request from a communication terminal, delivers a mail for the communication terminal, to a mail transfer server, and to the communication terminal, the relay server comprising a processor and a non-transitory storage unit storing a mail relay program, wherein the mail relay program, when executed by the processor, causes the relay server: to receive a mail from the mail transfer server; after receiving the mail, to judge whether a compression effect of the received mail exceeds a predetermined value, or equal to or lower than the predetermined value; when it is judged that the compression effect of the received mail exceeds the predetermined value, to compress the received mail including a mail body and a mail header to create a body of a mail for saving, to create a header of the mail for saving including compression information on the compression and information included in the mail header of the received mail, and to transmit to the mail management server the mail for saving including the header of the mail for saving and the body of the mail for saving, to make the management server save the mail for saving; and when it is judged that the compression effect is equal to or lower than the predetermined value, to transmit the received mail to the mail management server, so as to make the management server save the received mail without compressing the received mail as a mail for saving, wherein the mail relay program, when executed by the processor, further causes the relay server, when receiving a request relating to a mail saved in the mail management server from the communication terminal: wherein the mail relay program, when executed by the processor, further causes the relay server, if the received information relating to the mail relates to the mail for saving, and the analysis result indicates that the request is a mail fetch request, a request to fetch a part of mail data, or a request to analyze mail data: wherein the mail relay program, when executed by the processor, further causes the relay server: