US 2010/0306329 A1Published application

Mail relay server

AssigneeHitachi, Ltd.

InventorsMasafumi KINOSHITA, Toshiyuki Kamiya, Takafumi Koike

Life of this patent

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Abstract

To solve the problem with mobile phone carriers that increasing mail traffic increases storage capacity of a mail server and network load, a relay server which relays a mail transfer (SMTP communication) and a mail fetch (IMAP communication) is installed in a carrier facility network. The relay server compresses a mail including a header transferred from a mail transfer server, adds a new header to encapsulate the mail, and transmits the encapsulated mail to an IMAP server as a compressed mail. In response to a mail fetch request from a communication terminal, the relay server decapsulates and restores the compressed mail fetched from the IMAP server, and transmits the restored mail to the communication terminal. The relay server changes parameters such as the mail size, so that no inconsistency of IMAP commands occurs in compressing/restoring the mail.

Claims10

Dependent claims

A relay server connected to a mail management server that saves mails 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, wherein the relay server,

receives a mail from the mail transfer server;
if it is judged that a compression effect of the received mail exceeds a predetermined value,
compresses the mail including a mail body and a mail header to create a body of a compressed mail,
creates a header of the compressed mail including compression information on the compression and information included in the mail header, and
transmits to the mail management server the compressed mail including the header of the compressed mail and the body of the compressed mail, to make the management server save the compressed mail;
or
if it is judged that the compression effect is equal to or lower than the predetermined value,
transmits the received mail to the mail management server, to make the management server save the received mail.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/787,079Filed 25 May 2010
Priority: JP 2009-12596126 May 2009
Published: 2 Dec 2010
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

H04L 51/066
Message adaptation to terminal or network requirements: format adaptation, e.g. format conversion or compression
H04L 67/5651
Conversion or adaptation of application format or content: reducing the amount or size of exchanged application data
H04L 69/04
Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass:…
H04L
Digital communication

Family

US 8,621,013 B2Related patent
US 2010/0306329 A1This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

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