JPH11252165A - Electronic mail system with mail delete function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To delete a conventional mail to be already sent by sending a delete request mail. SOLUTION: A mail transmission means 11 of a terminal (a) stores a mail type, a sender side mail address and a transmission time as header information and sends a usual mail and a transmission history file 13 stores a transmitted usual mail and its transmission history information. A mail storage means 31 of a mail server B stores it in a mail post 32 when the usual mail is received. A delete request mail transmission means 12 acquires the mail stored in the transmission history file 13 and switches the mail type of the mail for a delete request and sends the mail as the delete request mail. The mail storage means 31 retrieves a mail of the same sender side mail address and the same transmission time from the mail post 32 when the delete request mail is transmitted and deletes the mail from the mail post 32 when the relevant mail is present.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an electronic mail system in which a plurality of terminals and a mail server are connected via a network, and more particularly to an electronic mail system with a mail deleting function.

[0002]

2. Description of the Related Art In a conventional electronic mail system, even if an error in the contents of a mail or a destination is found on the transmission side after transmission of an electronic mail (hereinafter simply referred to as mail),
I was unable to cancel sending my email. For this reason, the recipient is supposed to read the mail without knowing that the mail is erroneous or not originally addressed to the user. In addition, even when the contents need to be kept confidential, no action can be taken from the transmitting side.

[0003] Further, even if a revised or corrected mail or a mail apologizing for erroneous transmission is sent after sending an e-mail with an incorrect content or destination, the recipient calls in order from the first sent e-mail. It was wasted effort and time to go. In addition, the accumulation of updated or corrected mails or mails that apologize for erroneous transmission wastes storage media for mail posts on the receiving mail server or received files on the receiving terminal.

Therefore, the "e-mail management system" disclosed in Japanese Patent Application Laid-Open No. 6-290118 provides an e-mail management system capable of deleting an arbitrary e-mail from an arbitrary point at a low cost or at a high speed. ing. However, this "e-mail management system" has increased the number of communication bases so that if the terminal that normally accesses the mail server is unavailable, you can access your own mail even from a remote location. And it did not go outside the network under one mail server, so it was not possible to delete the mail sent from another mail server.

A "mail information management device in a distributed mail system" disclosed in Japanese Patent Application Laid-Open No. 6-195275 discloses a communication dedicated to transmission and reception of a deletion request or the like to a mail server in order to add a mail deletion function. The control unit is newly provided. In other words, the communication is performed in a part different from the communication part for transmitting and receiving the normal mail for transmitting the deletion request. Providing a new communication control unit different from such normal mail transmission / reception means a significant modification of the e-mail system. For example, in an e-mail system via the Internet, such modification is extremely difficult. there were.

[0006]

In the prior art described above, in order to delete and cancel a sent e-mail, the existing e-mail system must be significantly modified. There is a problem that it cannot be used for sending and receiving e-mails via the Internet, which is a network.

A first object of the present invention is to provide a mail requesting deletion of a mail from a terminal (hereinafter referred to as a deletion request mail).
Is to provide an e-mail system with a mail deletion function that can delete a normal mail (hereinafter, referred to as a normal mail) that has already been transmitted.

A second object of the present invention is to provide a mail deletion function for deleting a mail stored in a mail post of a receiving mail server from a sending terminal without significantly modifying an electronic mail system. To provide an attached e-mail system.

Further, a third object of the present invention is to provide an e-mail system with a mail deletion function which can delete a mail received in a reception file of a reception terminal from a transmission terminal without major modification. An electronic mail system is provided.

Further, a fourth object of the present invention is to provide a method in which a mail stored in a mail post of a receiving mail server and a received file of the receiving terminal are transmitted from a sending terminal to a mail file of a receiving mail server without significant modification of an electronic mail system. An object of the present invention is to provide an e-mail system with a mail deletion function capable of deleting a received mail.

[0011] On the other hand, a fifth object of the present invention is to record a program for realizing an electronic mail system with a mail deletion function that can delete mail stored in a mail post of a receiving mail server from a transmitting terminal. It is another object of the present invention to provide a recording medium that has been designed.

A sixth object of the present invention is to record a program for realizing an e-mail system with a mail deletion function capable of deleting a mail received in a reception file of a reception terminal from a transmission terminal. It is to provide a recording medium.

Further, a seventh object of the present invention is to delete a mail stored in a mail post of a receiving mail server and a mail received in a receiving file of a receiving terminal from a transmitting terminal. An object of the present invention is to provide a recording medium on which a program for realizing an electronic mail system with a mail deletion function is recorded.

[0014]

According to the present invention, there is provided an e-mail system with an e-mail deletion function, which is capable of deleting an already transmitted e-mail by transmitting a deletion request e-mail from a terminal in the e-mail system. Features.

Further, in the electronic mail system with the mail deletion function of the present invention, in the electronic mail system in which a plurality of terminals and a mail server are connected via a network, the transmitting terminal is configured such that the mail type, the transmitting mail address and A mail transmitting means for storing a transmission time as header information to transmit a mail, a mail transmitted by the mail transmitting means and a transmission history file for storing the transmission history information, and a mail stored in the transmission history file. A deletion request mail transmitting unit that obtains and switches the mail type of the mail for the deletion request and transmits the mail as a deletion request mail, and the receiving mail server transmits the mail post storing the mail and the normal mail. When the message is stored in the mail post and a deletion request mail is sent Wherein the mail post searching for emails same sender mail address and transmission time, characterized in that it comprises a mail storing means for deleting the mail.

Further, the electronic mail system with the mail deletion function of the present invention is an electronic mail system in which a plurality of terminals and a mail server are connected via a network. A mail transmitting means for storing a transmission time as header information to transmit a mail, a mail transmitted by the mail transmitting means and a transmission history file for storing the transmission history information, and a mail stored in the transmission history file. A deletion request mail transmitting unit that obtains and switches the mail type of the mail for the deletion request and transmits the mail as a deletion request mail, wherein the receiving side terminal receives the mail and receives a normal file. To the received file and delete it when the deletion request mail is sent. From the received file if over de searching for emails same sender mail address and transmission time, characterized in that it comprises a mail receiving means for deleting the mail.

Further, the e-mail system with the e-mail deletion function of the present invention is an e-mail system in which a plurality of terminals and a mail server are connected via a network. Mail sending means for sending a mail by storing the sending time and the sending time as header information, a sending history file for saving the mail sent by the mail sending means and its sending history information, and a mail saved in the sending history file And a deletion request mail transmission means for switching the mail type of the mail for the deletion request and transmitting the mail as a deletion request mail, wherein the receiving mail server receives the mail post for storing the mail and the normal mail. Accumulates in the mail post and a deletion request mail is sent Sometimes, a mail with the same sending mail address and sending time is searched from the mail post, and if there is a mail with the same sending mail address and sending time, the mail is deleted, and the same sending mail address and sending time are deleted. Mail storage means for storing a deletion request mail in the mail post if there is no mail,
The receiving terminal receives the same file as the received file for receiving the mail, and receives the same received file when the normal mail is transmitted, and deletes the same file from the received file if the deletion request mail is transmitted in the delete mode. Mail receiving means for searching for a mail at the sending mail address and the sending time and deleting the mail.

On the other hand, the recording medium of the present invention is a mail transmitting means for transmitting a mail by storing a mail type, a transmitting mail address and a transmission time as header information, and a mail transmitted by the mail transmitting means. And a transmission history file for storing the transmission history information, and a deletion request mail transmitting means for acquiring the mail stored in the transmission history file, switching the mail type of the mail for the deletion request, and transmitting it as a deletion request mail Record the program for

Further, the recording medium of the present invention stores a mail server computer in a mail post for storing mail, and when a normal mail is transmitted, stores the mail server computer in the mail post, and when a deletion request mail is transmitted. A program for searching the mail post for a mail having the same transmission side mail address and transmission time and for functioning as mail storage means for deleting the mail is recorded.

Further, in the recording medium of the present invention, the sending terminal computer stores the mail type, the sending mail address and the sending time as header information to send mail, and the mail is sent by the mail sending means. Transmission history file for storing the mail and its transmission history information, and a deletion request mail transmitting means for acquiring the mail stored in the transmission history file, switching the mail type of the mail for the deletion request, and transmitting it as a deletion request mail A mail server for storing mail, and a mail post for storing mail, and storing the mail in the mail post when a normal mail is transmitted, and when the deletion request mail is transmitted. Same sender email address and send from mail post Searching for emails time recording the program for functioning as a mail storage means for deleting the mail.

Still further, the recording medium according to the present invention is characterized in that the terminal computer receives the received file when receiving the mail and the received file when the normal mail is transmitted and receives the deletion request mail when the deletion request mail is transmitted. If the deletion mode is selected, a program which functions as a mail receiving means for searching for a mail having the same transmission side mail address and transmission time from the received file and deleting the mail is recorded.

In the recording medium of the present invention, the transmitting terminal computer stores the mail type, the transmitting mail address and the transmission time as header information and transmits the mail, and the mail is transmitted by the mail transmitting means. Transmission history file for storing the mail and its transmission history information, and a deletion request mail transmitting means for acquiring the mail stored in the transmission history file, switching the mail type of the mail for the deletion request, and transmitting it as a deletion request mail And a program for causing the receiving-side terminal computer to receive the mail when the file is received, and the received file when the normal mail is transmitted, and the deletion mode when the deletion request mail is transmitted. If it is, the same sender email address and Searching for emails fine transmission time recording the program to function as a mail receiving means for deleting the mail.

Further, the recording medium of the present invention stores a mail server computer in a mail post for storing mail, and in a mail post when a normal mail is transmitted, and when a deletion request mail is transmitted. In the mail post, the mail of the same sending mail address and the sending time is searched from the mail post, and if there is the mail of the same sending mail address and the sending time, the mail is deleted, and the mail of the same sending mail address and the sending time is deleted. If there is no mail, a program for functioning as mail storage means for storing the deletion request mail in the mail post is recorded.

Still further, in the recording medium of the present invention, the transmitting terminal computer stores the mail type, the transmitting mail address and the transmission time as header information and transmits the mail, and the mail transmitting means transmits the mail. A transmission history file for storing the transmitted mail and its transmission history information, and a deletion request mail transmission for acquiring the mail stored in the transmission history file, switching the mail type of the mail for the deletion request, and transmitting it as a deletion request mail A program for functioning as a means and a receiving mail server computer are stored in a mail post for storing mail, and when the normal mail is transmitted, the mail is stored in the mail post, and when a deletion request mail is transmitted. The same sender email address from the mail post and Search for the mail of the transmission time and delete the mail if there is the mail of the same sender mail address and transmission time, and if there is no mail of the same sender mail address and transmission time, put the deletion request mail in the mail post. A program for functioning as a mail storage means for storing and a receiving terminal computer are received in the received file when the mail is received and the received file when the normal mail is transmitted, and a deletion request mail is transmitted. If the deletion mode is selected at the time, a program for functioning as a mail receiving means for searching for a mail having the same transmission side mail address and transmission time from the received file and deleting the mail is recorded.

In the e-mail system with the mail deletion function of the present invention, the deletion of the post-transmission mail is performed by adding the transmission function of the deletion request mail requesting the deletion of the mail in the e-mail system via the network. Make it possible. As a result, it is possible to cancel a mail whose contents are erroneously transmitted or a mail whose mate is wrongly transmitted from the transmission side.

[0026]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of an e-mail system with a mail deletion function according to the first embodiment of the present invention. An electronic mail system with a mail deletion function according to the present embodiment includes a terminal a (hereinafter, referred to as a transmission terminal a) including a mail transmission unit 11, a deletion request mail transmission unit 12, and a transmission history file 13, and a transmission terminal a. Server A connected to and including mail transfer means 21
(Hereinafter, referred to as a sending mail server A) and a mail server B connected to the sending mail server A via a network and including a mail storage unit 31 and a mail post 32.
(Hereinafter, referred to as a receiving side mail server B) and a terminal b (hereinafter, referred to as a receiving side terminal b) connected to the receiving side mail server B and including the mail receiving means 41 and the received file 42.
Thus, the main part is constituted.

Referring to FIG. 2A, the mail includes a header portion including a header spare area, a data portion, and an FCS (F
name check sequence).

Referring to FIG. 2B, the header part of the mail includes a destination mail address, a port number, and a spare header area. The spare header area includes an identifier (for determining whether the mail is a normal mail or a deletion request mail). Hereafter, a mail type), a sending mail address, and a sending time (year, month, day, hour, minute, second) are stored.

FIG. 2C is a diagram showing a specific data example of mail.

Referring to FIG. 3, the transmission history file 13
Contains the email type, sender email address, sending time,
Transmission history information including a title, a destination mail address, and a spare is stored together with the normal mail.

Referring to FIG. 4, the processing of the mail transmission means 11 includes a transmission request detection step S101, a header information addition step S102, a header information and transmission information storage step S103, and a normal mail transmission step S10.
4

Referring to FIG. 5, the processing of the deletion request mail transmission means 12 includes a deletion request mail transmission request detection step S201, a request mail calling step S202, a mail type conversion step S203, and a deletion request mail transmission step S204. Consists of

Referring to FIG. 6, the processing of mail storage means 31 includes a mail arrival step S301, a deletion request mail determination step S302, and a normal mail storage step S302.
303, an identical key mail search step S304, a search presence / absence determination step S305, a corresponding mail deletion step S306, and a deletion request mail discard step S307.

FIG. 7 exemplifies the flow when transmitting the normal mail m1.

FIG. 8 exemplifies the flow when the deletion request mail m2 is transmitted.

Next, the operation of the thus-configured electronic mail system with the mail deleting function according to the first embodiment will be described with reference to FIGS.

In the transmitting terminal a, the mail transmitting means 11
Receives the transmission request of the normal mail m1 (step S
101), deletion request mail m2 for normal mail m1
For the time of transmission, the header information including the mail type (normal), the mail address of the transmission side, and the transmission time is added to the spare header area (step S102).

Next, the mail transmitting means 11 sets the header information and the transmission information (title, destination mail address) as a set and saves them in the transmission history file 13 together with the ordinary mail m1 as transmission history information (step S10).
3).

Subsequently, the mail transmitting means 11 transmits the normal mail m1 to the destination mail address (step S104).

Normal mail m transmitted from transmitting terminal a
1 is once sent to the sending mail server A (FIG. 7). The sending mail server A transfers the normal mail m1 to the receiving mail server B via the network between the mail servers A and B by the mail transfer means 21 (in FIG. 7).

In the receiving mail server B, the normal mail m
1 arrives (step S301), the mail storage unit 31 determines that the received mail is the normal mail m1 based on the mail type in the header (step S301).
(No in 302), and accumulates in mail post 32 (step S303).

The receiving terminal b activates the mail receiving means 41 at an arbitrary time, receives the normal mail m1 from the mail post 32 of the receiving mail server B, and receives the received file 42
(FIG. 7).

When the transmitting terminal a receives the transmission request of the deletion request mail m2 for the normal mail m1 (step S201), the deletion request mail transmission means 12 calls the corresponding normal mail m1 from the transmission history file 13 (step S201). In step S202, the mail type in the header part is converted into a mail for deletion request (step S203), and the mail is transmitted as a deletion request mail m2 to the destination mail address (step S204).

The deletion request mail m2 sent from the sending terminal a is once sent to the sending mail server A (FIG. 8).
of). The sending mail server A is provided with a mail transfer unit 21
Then, the deletion request mail m2 is transferred to the receiving mail server B via the network between the mail servers A and B (in FIG. 8).

In the receiving mail server B, when the deletion request mail m2 arrives (step S301), the mail storage means 31 determines that the received mail is the deletion request mail m2 based on the mail type in the header portion. (Yes in step S302), the mail post 32 is set using the sending mail address and the sending time in the header as keys.
The normal mail m1 having the same key is searched from the inside (step S304). If there is a normal mail m1 with the same key (Yes in step S305), the mail storage unit 31 deletes the normal mail m1 from the mail post 32 (step S306) and discards the deletion request mail m2 (step S307). . Normal mail with the same key
If 1 does not exist (No in Step S305), the mail storage unit 31 discards the deletion request mail m2 (Step S307).

Next, an electronic mail system with a mail deletion function according to a second embodiment of the present invention will be described.

FIG. 9 is a block diagram showing the configuration of an e-mail system with a mail deletion function according to the second embodiment of the present invention. An electronic mail system with a mail deletion function according to the present embodiment includes a terminal a (hereinafter, referred to as a transmission terminal a) including a mail transmission unit 11, a deletion request mail transmission unit 12, and a transmission history file 13, and a transmission terminal a. Server A connected to and including mail transfer means 21
(Hereinafter, referred to as a transmitting mail server A), a mail server B (hereinafter, referred to as a receiving mail server B) connected to the transmitting mail server A via a network and including a mail storage means 31 'and a mail post 32, The terminal b (hereinafter, referred to as the receiving terminal b) which is connected to the receiving mail server B and includes the mail receiving means 41 'and the receiving file 42 constitutes a main part thereof. That is,
The e-mail system with the mail deletion function according to the present embodiment is different from the e-mail system with the mail deletion function according to the first embodiment in that the mail storage means 31 and the mail reception means 41 are replaced by the mail storage means 31 'and the mail reception means. In this case, the means 41 'are replaced.

Referring to FIG. 10, mail storage means 3
The processing of 1 ′ includes a mail arrival step S301, a deletion request mail determination step S302, a normal mail storage step S303, and a same key mail search step S304.
, Search presence / absence determination step S305, pertinent mail deletion step S306, and deletion request mail discard step S3
07.

Referring to FIG. 11, mail receiving means 4
The processing of 1 ′ includes a mail arrival step S401, a deletion request mail determination step S402, a normal mail reception step S403, and a deletion mode ON determination step S404.
Same key mail search step S405, search presence / absence determination step S406, and corresponding mail deletion step S4
07, and a deletion request mail discarding step S408.

FIG. 12 exemplifies a flow at the time of transmitting the deletion request mail m2.

Next, the operation of the electronic mail system with the mail deletion function according to the second embodiment configured as described above is different from the operation of the electronic mail system with the mail deletion function according to the first embodiment. The following describes mainly the points to be performed.

In the mail storage means 31 of the first embodiment, if the normal mail m1 having the same sending mail address and transmission time as the deletion request mail m2 does not exist in the mail post 32, the deletion request mail m
However, in the mail storage means 31 'of the second embodiment, if there is no normal mail m1 to be deleted in the mail post 32, it is further deleted to the receiving terminal b. In order to search for the target normal mail m1, the deletion request mail m2 is accumulated in the mail post 32 in the same manner as the normal mail m1, without being discarded.

More specifically, when the deletion request mail m2 arrives at the receiving mail server B (step S301),
The mail storing means 31 'determines that the received mail is the deletion request mail m2 based on the mail type in the header part (Yes in step S302), and sets the transmission side mail address and the transmission time in the header part as a key. Normal mail m1 having the same key from within mail post 32
(Step S304). If there is a normal mail m1 with the same key (Yes in step S305), the mail storage unit 31 'deletes the normal mail m1 from the mail post 32 (step S306) and discards the deletion request mail m2 (step S307). ). If there is no normal mail m1 with the same key (No in step S305), the mail storage unit 31 'deletes the deletion request mail m2.
Is stored in the mail post 32 (step S303).

At the receiving terminal b, the mail receiving means 41 'is started at an arbitrary time, and when the deletion request mail m2 arrives from the receiving mail server B, the mail receiving means 41'.
Performs the same operation as that performed by the mail storage means 31. However, in this case, the normal mail m1 already belonging to the recipient is to be deleted. Therefore, the deletion mode is set so that the normal mail m1 cannot be deleted if the recipient does not like it. .

More specifically, when the deletion request mail m2 arrives at the receiving terminal b (step S401), the mail received by the mail receiving means 41 'based on the mail type in the header is the deletion request mail m2. (Step S402: Yes), it is determined whether the deletion mode is ON (Step S404). If the delete mode is ON, the mail receiving means 41 'searches for the ordinary mail m1 of the same key received in the reception file 42 by using the transmission side mail address and the transmission time in the header as keys (step). S405). If a normal mail m1 with the same key exists (Yes in step S406), the mail receiving unit 41 'deletes the normal mail m1 from the received file 42 (step S407),
The deletion request mail m2 is discarded (step S408).
If the delete mode is not ON (NO in step S404) or if there is no ordinary mail m1 with the same key (NO in step S406), the mail receiving unit 4
1 'discards the deletion request mail m2 (step S4
08).

In the second embodiment, when the normal mail m1 having the same sending mail address and sending time as the deletion request mail m2 does not exist in the mail post 32, the receiving terminal b is sent to the receiving terminal b. Until then, the normal mail m1 to be deleted is searched for. However, the receiving mail server B always stores the deletion request mail m2 in the same manner as the normal mail m1, and the normal mail to be deleted only at the receiving terminal b. The mail m1 may be deleted. By doing so, the modification of the mail transmission means of the transmission terminal a and the modification of the mail reception means of the reception terminal b can be made without any modification to the mail storage means conventionally provided in the reception mail server B. Thus, there is an advantage that a mail deletion function can be realized.

Next, a third embodiment of the present invention will be described with reference to the drawings.

Referring to FIG. 13, the e-mail system with the mail deletion function according to the third embodiment of the present invention is different from the e-mail system with the mail deletion function according to the first embodiment shown in FIG. On the other hand, a recording medium 51 in which a mail transmission program is recorded in the transmitting terminal a and a recording medium 52 in which a mail storage program is recorded in the receiving mail server B are provided. These recording media 51 and 52 may be magnetic disks, semiconductor memories, or other recording media.

In the thus configured e-mail system with the mail deletion function according to the third embodiment, the mail transmission program is read from the recording medium 51 to the transmission side terminal a, and the mail reception means 11, the deletion request mail The transmitting terminal a as the transmitting means 12 and the transmission history file 13
Control the operation of. Therefore, the operation of the transmitting terminal a is exactly the same as in the first embodiment, and a detailed description thereof will be omitted. The mail storage program is read from the recording medium 52 to the receiving mail server B, and controls the operation of the receiving mail server B as the mail storing means 31 and the mail post 32. Therefore, the operation of the receiving-side mail server B is exactly the same as in the first embodiment, and a detailed description thereof will be omitted.

Next, a fourth embodiment of the present invention will be described with reference to the drawings.

Referring to FIG. 14, the e-mail system with the mail deletion function according to the fourth embodiment of the present invention is the same as the e-mail system with the mail deletion function according to the second embodiment shown in FIG. On the other hand, the recording medium 51 recording the mail transmission program on the transmitting terminal a, the recording medium 52 'recording the mail storing program on the receiving mail server B, and the recording medium recording the mail receiving program on the receiving terminal b. 53 are provided. These recording media 51, 52 'and 53 may be magnetic disks, semiconductor memories, or other recording media.

In the thus configured e-mail system with the mail deletion function according to the fourth embodiment, the mail transmission program is read from the recording medium 51 to the transmitting terminal a, and the mail receiving means 11, the deletion request mail The transmitting terminal a as the transmitting means 12 and the transmission history file 13
Control the operation of. Therefore, the operation of the transmitting terminal a is exactly the same as in the second embodiment, and a detailed description thereof will be omitted. Further, the mail storage program is read from the recording medium 52 'into the receiving mail server B, and the mail storage means 31' and the mail post 3 are read.
As 2, the operation of the receiving mail server B is controlled. Therefore, the operation of the receiving-side mail server B is exactly the same as in the second embodiment, and a detailed description thereof will be omitted. Further, the mail receiving program is read from the recording medium 53 to the receiving terminal b, and controls the operation of the receiving terminal b as the mail receiving means 41 ′ and the receiving file 42. Therefore, the operation of the receiving terminal b is exactly the same as in the second embodiment, and a detailed description thereof will be omitted.

In the above embodiments, the mail transmitted from the transmitting terminal a has been described to be stored in the receiving mail server B via the transmitting mail server A. Needless to say, the present invention can be similarly applied to an electronic mail system in which a large number of terminals are connected to one host mail server via a network.

In each of the above embodiments, the terminal a and the mail server A have been described as the transmitting side, and the terminal b and the mail server B have been described as the receiving side. However, considering that the electronic mail system is a two-way communication system. , Terminal a and mail server A on the receiving side, terminal b and mail server B
May be used as the transmitting side. That is, the terminals a and b have a mail transmitting unit, a deletion request mail transmitting unit, a transmission history file, a mail receiving unit, and a receiving file, respectively, and the mail server A and the mail server B have a mail transferring unit, a mail storing unit, Needless to say, each mail post can be provided.

[0066]

The first effect is that, without making a major change to the existing e-mail system, an e-mail having an error in the contents already transmitted by the sender or an e-mail having the wrong destination is deleted from the transmitting terminal. Therefore, it is possible to minimize the distribution of erroneous information and to quickly respond to the case where the contents need to be kept confidential to a third party.

The second effect is that the sender can delete a mail that has lost its meaning as information (a mail that has become old information without being read indefinitely). It is gone.
In addition, the e-mail reader does not need to read the old information, thereby saving unnecessary labor and time.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an e-mail system with a mail deletion function according to a first embodiment of the present invention.

FIG. 2 is a diagram showing the contents of an e-mail in the e-mail system with a mail deletion function according to the first embodiment.

FIG. 3 is a diagram showing contents of transmission history information stored in a transmission history file in FIG. 1;

FIG. 4 is a flowchart showing a process of a mail transmitting unit in FIG. 1;

FIG. 5 is a flowchart showing a process of a deletion request mail transmitting unit in FIG. 1;

FIG. 6 is a flowchart showing the processing of the mail storage means in FIG. 1;

FIG. 7 is a diagram showing a flow at the time of transmitting a normal mail in the electronic mail system with the mail deletion function according to the first embodiment.

FIG. 8 is a diagram showing a flow at the time of transmitting a deletion request mail in the electronic mail system with the mail deletion function according to the first embodiment.

FIG. 9 is a block diagram showing a configuration of an e-mail system with a mail deletion function according to a second embodiment of the present invention.

FIG. 10 is a flowchart showing the processing of the mail storage means in FIG.

FIG. 11 is a flowchart showing processing of the mail receiving means in FIG. 9;

FIG. 12 is a diagram showing a flow at the time of transmitting a deletion request mail in the electronic mail system with a mail deletion function according to the second embodiment.

FIG. 13 is a block diagram showing a configuration of an e-mail system with a mail deletion function according to a third embodiment of the present invention.

FIG. 14 is a block diagram showing a configuration of an e-mail system with a mail deletion function according to a fourth embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 11 mail transmission means 12 deletion request mail transmission means 13 transmission history file 21 mail transfer means 31, 31 'mail storage means 32 mail post 41, 41' mail reception means 42 reception files 51, 52, 52 ', 53 recording medium a, b Terminal A, B Mail server m1 Normal mail m2 Delete request mail

Claims (11)

[Claims] 1. An e-mail system with a mail deletion function, wherein an already transmitted mail can be deleted by transmitting a deletion request mail from a terminal. 2. An e-mail system in which a plurality of terminals and a mail server are connected via a network, wherein a transmitting terminal transmits a mail by storing a mail type, a transmitting mail address and a transmission time as header information. Mail sending means, a sending history file for storing the mail sent by the mail sending means and the sending history information, and obtaining the mail stored in the sending history file and changing the mail type of the mail for the deletion request. A deletion request mail transmitting means for switching and transmitting the deletion request mail as a deletion request mail, wherein the receiving mail server stores the mail in the mail post, and stores the mail in the mail post when a normal mail is transmitted; The same sender email address and same email address Mail deletion function-equipped electronic mail system, comprising searching for email transmission time and mail storage means for deleting the mail. 3. An e-mail system in which a plurality of terminals and a mail server are connected via a network, wherein a transmitting terminal transmits a mail by storing a mail type, a transmitting mail address and a transmission time as header information. Mail sending means, a sending history file for storing the mail sent by the mail sending means and the sending history information, and obtaining the mail stored in the sending history file and changing the mail type of the mail for the deletion request. Switching means for sending a deletion request mail as a deletion request mail, wherein the receiving terminal receives the received file and the reception file when the normal mail is transmitted, and If it is in delete mode when sent, the same sender mail Mail deletion function-equipped electronic mail system, characterized in that searching for emails less and the transmission time and a mail receiving means for deleting the mail. 4. An electronic mail system in which a plurality of terminals and a mail server are connected via a network, wherein a transmitting terminal transmits a mail by storing a mail type, a transmitting mail address and a transmission time as header information. Mail sending means, a sending history file for storing the mail sent by the mail sending means and the sending history information, and obtaining the mail stored in the sending history file and changing the mail type of the mail for the deletion request. A deletion request mail transmitting means for switching and transmitting the deletion request mail as a deletion request mail, wherein the receiving mail server stores the mail in the mail post, and stores the mail in the mail post when a normal mail is transmitted; The same sender email address and same email address And search for e-mail transmission time to delete the e-mail if there is an e-mail of the same transmission side mail address and the transmission time,
Mail storage means for storing a deletion request mail in the mail post if there is no mail with the same sender mail address and transmission time, wherein the receiving terminal receives the received file and the normal mail. When the received file is received in the received file and the deletion request mail is sent, if the deletion mode is set to the deletion mode, the mail to search for the mail with the same sender mail address and transmission time from the received file and delete the mail An e-mail system with a mail deletion function, comprising: a receiving unit. 5. A mail sending means for sending a mail by storing a mail type, a sending mail address and a sending time as header information, and storing the mail sent by the mail sending means and its transmission history information. And a program for functioning as a deletion request mail transmitting means for acquiring the mail stored in the transmission history file, switching the mail type of the mail for the deletion request, and transmitting the mail as the deletion request mail. recoding media. 6. A mail server computer for storing a mail in a mail post for storing mail, and in the mail post when a normal mail is transmitted, and when the deletion request mail is transmitted, the same mail post is transmitted from the mail post. A recording medium on which a program for functioning as a mail storing means for searching for a mail at a sending mail address and a sending time and deleting the mail is deleted. 7. A mail transmitting means for transmitting a mail by storing a mail type, a mail address of the transmitting side and a transmission time as header information, a mail transmitted by the mail transmitting means and its transmission history information. And a program for functioning as a deletion request mail transmitting means for acquiring the mail stored in the transmission history file, switching the mail type of the mail for the deletion request, and transmitting the mail as the deletion request mail. Storing the receiving mail server computer in the mail post for storing the mail, and when the normal mail is transmitted, in the mail post;
A recording medium on which a program for functioning as a mail storage means for retrieving a mail having the same sending side mail address and transmission time from the mail post when the deletion request mail is transmitted and deleting the mail is recorded. 8. When the terminal computer receives a received file for receiving an e-mail and the received file when a normal e-mail is transmitted, and receives the deletion request mail when the mode is a deletion mode, the terminal computer receives the received file. A recording medium on which a program for functioning as a mail receiving means for searching a file for a mail having the same transmission side mail address and transmission time and deleting the mail is recorded. 9. A mail transmitting means for transmitting a mail by storing a mail type, a mail address of a transmitting side and a transmission time as header information, a mail transmitted by the mail transmitting means and its transmission history information. And a program for functioning as a deletion request mail transmitting means for acquiring the mail stored in the transmission history file, switching the mail type of the mail for the deletion request, and transmitting the mail as the deletion request mail. When the receiving terminal computer receives the received file and the normal file, the receiving terminal receives the received file, and when the deletion request mail is transmitted, the receiving terminal computer deletes the received file. Search for emails with the same sender email address and send time. Recording medium storing a program to function as a mail receiving means for deleting the mail by. 10. A mail server computer for storing mail in a mail post for storing mail, and storing the mail in the mail post when a normal mail is transmitted, and transmitting the same mail from the mail post when a deletion request mail is transmitted. Searches for the mail of the sender's mail address and transmission time and deletes the mail if there is one with the same sender's mail address and transmission time, and deletes the mail if there is no mail with the same sender's mail address and transmission time. And a program for causing the program to function as mail storage means for storing the mail in the mail post. 11. A mail transmitting means for transmitting a mail by storing a mail type, a mail address of the transmitting side and a transmission time as header information, a mail transmitted by the mail transmitting means and transmission history information thereof. And a program for functioning as a deletion request mail transmitting means for acquiring the mail stored in the transmission history file, switching the mail type of the mail for the deletion request, and transmitting the mail as the deletion request mail. A mail server computer for receiving mail is stored in the mail post where mail is stored, and the mail post is stored in the mail post when a normal mail is transmitted, and the same mail side is transmitted from the mail post when a deletion request mail is transmitted. Search for the e-mail address and the e-mail If there is no mail with the sender's mail address and transmission time, the mail is deleted, and if there is no mail with the same sender's mail address and transmission time, the deletion request mail is functioned as mail storage means for storing the mail in the mail post. And a receiving terminal computer which receives the received file when receiving the mail, and the received file when the normal mail is transmitted, and the deletion mode when the deletion request mail is transmitted. A recording medium on which a program for functioning as a mail receiving means for retrieving a mail having the same sender mail address and transmission time from a received file and deleting the mail is recorded.