JP2002373141A - Electronic mail system with mail deleting function and electronic mail program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To delete already transmitted mail from an arbitrary terminal. SOLUTION: A transmission side mail server A is provided with a transmission history file 22 in which history information such as the transmission side mail address of already transmitted mail is preserved for a prescribed period. When the already transmitted mail is deleted, dial-up is performed from a terminal a2 and a terminal (an) which are different from a terminal a1 at the time of transmitting the mail, the preservation of the history information is inquired to the server A, and a mail delete request mail is transmitted. The server A deletes the history information from the transmission history file 22 according to the delete request mail and transfers the delete request mail to a reception side mail server B, and the server B deletes the mail prepared in a mail post 32. In this case, the terminals for transmitting the mail, for inquiring the history information and for transmitting the delete request mail may be made different.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an e-mail system, and more particularly to an e-mail system with an e-mail deletion function and an e-mail program capable of requesting deletion from any terminal.

[0002]

2. Description of the Related Art Conventionally, as an e-mail system with a mail deletion function, an e-mail requesting deletion of a transmitted e-mail (also referred to as "e-mail") is transmitted to a mail server on the transmission side, so that the e-mail is deleted. A technique configured to delete the mail stored in the mail server or the terminal on the receiving side is disclosed in, for example, JP-A-11-252.
No. 65 is described.

FIG. 10 is a diagram showing the configuration of such an electronic mail system with a mail deletion function. As shown in FIG. 10, the e-mail system with the e-mail deletion function includes the transmitted e-mail terminals a and b, and the terminals a and b.
The terminal a, which comprises mail servers A and B between the terminals b and b and transmits mail, includes a mail transmission unit 11, a deletion request mail transmission unit 12, and a transmission history file 13, and the mail server A
Has a mail transfer unit 21, the mail server B has a mail storage unit 31 and a mail post 32, and the terminal b for receiving a mail has a mail reception unit 41 and a reception file 42.

The conventional e-mail system with the mail deletion function having such a configuration operates as follows. That is,

[0005] When the user performs an operation of transmitting a normal mail at the terminal a, the mail transmitting means 11 stores the mail type, the mail address of the transmitting side and the transmission time as header information and transmits the normal mail. The history file 13 stores the transmitted normal mail and its transmission history information. Mail transfer means 2 of mail server A
1 is a mail server B for receiving a normal mail received from the terminal a.
Transfer to In the mail server B, the mail storage means 31 stores the mail in the mail post 32 when a normal mail is transmitted from the mail server A.

Next, when the user performs an operation of deleting the already transmitted normal mail at the terminal a, the deletion request mail transmitting means 12 obtains the normal mail stored in the transmission history file 13 and deletes the normal mail. The mail type is switched for the deletion request and transmitted as a deletion request mail. The mail transfer means 21 of the mail server A transfers the deletion request mail to the mail server B in the same manner as the normal mail.

[0007] The mail storage means 31 of the mail server B
Mail post 3 when a deletion request mail is sent
The mail with the same sending side mail address and sending time is searched from 2 and if there is a corresponding mail, this mail is deleted from the mail post 32.

[0008]

However, in the above-described conventional e-mail system with the mail deletion function, only the terminal a that transmitted the mail holds the transmission history file 13, so that terminals other than the terminal a do not There is a problem that a deletion request mail cannot be sent.

Further, even in a system configuration in which a transmission history file is provided in the other terminal b, it is difficult to share (synchronize) the transmission history information. There is a problem that it is impossible to delete the sent mail from.

(Object) An object of the present invention is to solve the above problems, and an electronic mail system with a mail deletion function capable of transmitting a deletion request mail from an arbitrary terminal to delete a transmitted mail, and To provide an e-mail program.

[0011]

According to the present invention, in order to provide a configuration of an e-mail system with a mail deletion function capable of transmitting a deletion request mail from an arbitrary terminal, a transmission history file 22 is provided in a mail server A, and dial-up is performed. By accessing the mail server A using such means as described above, a mail deletion request can be made from an arbitrary location, and it is not necessary to carry a terminal that has transmitted a normal mail in order to use the function of deleting a sent mail. .

An electronic mail system with a mail deletion function according to the present invention transmits a deletion request mail from a terminal to a sending mail server, thereby transmitting the sent electronic mail stored in the receiving mail server or the destination terminal. In an email system with an email deletion function that deletes
The transmission-side mail server, a transmission history file that stores information of normal e-mail as a transmission history for a certain period of time,
The information of the e-mail received from the terminal is stored in the transmission history file and transferred to the receiving mail server, and the inquiry log for inquiring about the transmission history of the transmitted e-mail received from the terminal is sent from the transmission history file. Searches the transmission history, returns a search result mail including the transmission history to the terminal, and deletes the transmission history of the transmitted mail in the transmission history file in response to the transmitted mail deletion request mail received from the terminal. And a mail transfer means for transferring the mail to the receiving mail server.
A terminal, a mail transmitting unit that transmits the electronic mail,
Inquiry mail transmitting means for transmitting the inquiry mail, search result mail receiving means for receiving the search result mail, and deletion request mail transmitting means for transmitting the deletion request mail based on the search result mail. Features.

The sending mail server in the electronic mail system with the mail deleting function of the present invention deletes the sent electronic mail stored in the receiving mail server or the destination terminal in response to the deletion request mail from the terminal. A transmission mail server in an e-mail system with an e-mail deletion function, wherein a transmission history file that stores normal e-mail information as a transmission history for a certain period of time, and a transmission history file that stores normal e-mail information received from a terminal. At the same time, the e-mail is saved to a file and the e-mail is forwarded to the receiving mail server.
Search the transmission history of the inquiry from the transmission history file,
The search result mail including the transmission history is returned to the terminal, and in response to the deletion request mail of the transmitted mail received from the terminal, the transmission history of the transmitted mail in the transmission history file is deleted, and the received mail is transmitted to the receiving mail server. And a mail transfer unit for transferring.

The terminal in the e-mail system with the e-mail deletion function of the present invention transfers the e-mail to the reception side mail server, and a transmission history file for storing e-mail information received from the terminal as a transmission history for a certain period of time. A terminal in an e-mail system with a mail deletion function for deleting a sent e-mail stored in a receiving mail server or a destination terminal by transmitting a deletion request mail to a sending mail server having a transfer means. A mail sending means for sending an e-mail, an inquiry mail sending means for sending an inquiry mail of a sent history of a sent mail, and a search result including a sending history of an inquiry from the sending mail server for the inquiry mail A search result mail receiving means for receiving a return of the mail, A delete request mail transmitting means for transmitting the delete request mail based on the serial search result mail, characterized in that it comprises a.

An electronic mail program according to the present invention is a transmission program in an electronic mail system with a mail deletion function for deleting a transmitted electronic mail stored in a receiving mail server or a destination terminal in response to a deletion request mail from a terminal. A transmission history file function (for example, as shown in FIG. 2) in which information of a normal electronic mail (for example, step s1 in FIG.
22) The function of storing the information of the normal e-mail received from the terminal in the transmission history file (for example, step s2 in FIG. 2) and transferring the e-mail to the receiving mail server (for example, the step in FIG. 2) s3) For the inquiry mail (for example, step s5 in FIG. 3) inquiring about the transmission history of the transmitted mail received from the terminal, search the transmission history of the inquiry from the transmission history file (for example, step s6 in FIG. 3), A search result mail including the transmission history is returned to the terminal (for example, step s in FIG. 3).
7) A function to perform a deletion request mail (for example, step s8 in FIG. 4) of the transmitted mail received from the terminal.
The transmission history of the transmitted mail in the transmission history file is deleted (for example, step s9 in FIG. 4) and transferred to the receiving mail server (for example, step s10 in FIG. 4).
The feature is to realize the function.

The e-mail program according to the present invention comprises a transmission history file for storing information of a normal e-mail received from a terminal as a transmission history for a certain period of time, and a transfer means for transferring the e-mail to a receiving mail server. The terminal computer in the e-mail system with the e-mail deletion function for deleting the transmitted e-mail stored in the reception side mail server or the destination terminal by transmitting the deletion request mail to the transmission side mail server,
A mail sending function for sending an e-mail (eg, step s1 in FIG. 2), an inquiry mail sending function for sending an inquiry mail of the transmission history of the sent mail (eg, step s5 in FIG. 3), a sending mail server for the inquiry mail (E.g., step s13 in FIG. 3) of receiving a return of a search result mail including a transmission history of an inquiry from a search result mail, and a deletion request mail requesting deletion of a mail of the transmission history based on the search result mail. The transmission function (for example, step s8 in FIG. 4) of the deletion request mail transmission function is realized.

In each of the above inventions, it is preferable that the information of the electronic mail is header information including a source mail address and a message ID or a transmission time. In addition, the present invention can apply a function of deleting a sent mail from a mobile terminal such as a PHS or a mobile phone.

(Function) Transmission side mail server A for transfer
A transmission history file 22 capable of storing history information such as transmitted e-mail information, for example, transmission side e-mail address, Message-Id (or transmission time) and title, for a predetermined period of time is provided. When deleting a sent mail, dial up from the terminal a1 or a different terminal a2, an at the time of transmission, and once inquire the mail server A to save the history information, send a deletion request mail for deleting the mail. Send. The transmission-side mail server A deletes the history information from the transmission history file 22 by the deletion request mail and transfers the deletion request mail to the reception-side mail server B, and the reception-side mail server B stores the deletion request mail in the mail post 32. Delete email. Also,
The transmitted mail is transferred from the receiving mail server B to the terminal to which the deletion request mail is transmitted and stored in the terminal. The terminal at the time of transmitting the mail, the terminal at the time of inquiring the history information, and the terminal at the time of transmitting the deletion request mail may be different from each other, and can be deleted from any terminal.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Description of Configuration) FIG. 1 is a diagram showing the configuration of an embodiment of an electronic mail system with a mail deletion function and an electronic mail program according to the present invention. In the present embodiment, a terminal a for sending mail such as a PC (personal computer) and a mail server A for transferring mail
And a mail server B for storing mail, and a terminal b for receiving mail such as a PC.

The terminal a includes a mail transmitting unit 11, an inquiry mail transmitting unit 12, and a search result mail receiving unit 1.
3 and a deletion request mail transmission unit 14. The mail server A includes a mail transfer unit 21 and a transmission history file 22. The mail server B includes a mail storage unit 31 and a mail post 32. Terminal b is
A mail receiving unit 41 and a reception file 42 are provided.

The data format of the electronic mail (mail) transmitted and received between the terminals a and b includes a header part and a data part, and the header part includes header information as header information, which is a receiving side (destination) mail. Address, port number, mail type, sender mail address and Message-Id
(Or transmission time), and the data section stores a message or the like.

The mail sending means 11 sends the mail type, sending mail address and Message-Id (or sending time).
Is stored as header information, the mail type is normal, and the mail address of the sender is a mail including the desired message set as the mail sender address ("normal mail").
That. ).

The mail sending means 12 sends a mail type, a sending mail address, and a Message-Id (or a sending mail address) to the sending history file 22 in order to inquire the history of the sent mail held for a period set in the system in advance. ) Is stored as header information, the mail type is used for inquiry, and the sender address is the address stored in the sent mail, that is, the mail set as the address of the mail sender (referred to as “inquiry mail”). .

The search result mail receiving means 13 searches the mail server A for the inquiry mail by the mail address on the sending side and sends it. The mail address on the sending side, Message-Id (or sending time), title, etc. (Referred to as "search result mail") including the information of the above.

The deletion request mail transmitting means 14 transmits the search result mail acquired by the search result mail receiving means 13.
Message-Id (or transmission time) and the sender's mail address are stored as header information, and a mail whose mail type is set for deletion request (referred to as “deletion request mail”) is transmitted.

The mail transfer means 21 of the mail server A
When a normal mail is sent, information such as the sender's mail address, Message-Id (or transmission time) and title is newly added to the transmission history file 22 (the transmission history file is updated), and the normal mail is updated. To the mail server B.

When an inquiry e-mail is sent, the history of e-mails sent from the same e-mail address, which is retained for a preset period in the system, is
The transmission history file 22 is searched based on the transmission side mail address, and the search result mail is transmitted to the transmission source.

When a deletion request mail is sent, the information of the mail is deleted from the transmission history file 22 (the transmission history file is updated), and the mail is transferred to the mail server B.

Transmission history file 22 of mail server A
Holds information such as the Message-Id (or transmission time) of the transmitted mail, the sender's mail address, and the title for a period set in the system in advance.

The mail storage means 31 stores the normal mail in the mail post 32 when the normal mail is transmitted. When the deletion request mail is sent, the mail post 32 is searched based on the sender's mail address and Message-Id (or transmission time), and if there is such mail, the mail is deleted from the mail post 32. .

The mail receiving means 41 receives mail from the mail server B. The received file 42 stores the mail acquired by the mail receiving means 41.

(Explanation of Operation) Next, FIGS. 2, 3 and 4
The operation of the present exemplary embodiment will be described in detail with reference to FIG. FIGS. 2, 3 and 4 are diagrams in which a mail processing procedure is additionally shown in the electronic mail system with the mail deletion function shown in FIG.

The owner of the sending mail address wants to send mail, and sends mail from the mail sending means 11 of the terminal a (step S1 in FIG. 2). When the mail transfer means 21 of the mail server A receives the mail and confirms that the mail type is the normal mail, the transmission history file 22 stores the mail address of the sender of the mail,
Information such as Message-Id (or transmission time) and title is newly added (update of transmission history file: step S2 in FIG. 2). Thereafter, the mail transfer means 21 transfers the mail to the mail server B (step S in FIG. 2).
3). The mail storage means 31 of the mail server B receives the transferred mail and, after confirming that the mail type is the normal mail, stores the received mail in the mail post 32 (step S4 in FIG. 2).

Next, the owner of the sending mail address wants to delete the sent mail, and first, in order to inquire about the sent mail recorded in the sending history file 22, the inquiry mail transmitting means 12 of the terminal a is used. Then, an inquiry mail whose mail type is switched for inquiry is transmitted (step S5 in FIG. 3). When the mail transfer means 21 of the mail server A receives the mail and confirms that the mail type is for inquiry, the mail transfer means 21 stores the history of the mail transmitted from the same mail address, which is retained for a period set in advance in the system. Then, a search is made from the transmission history file 22 based on the transmission side mail address (step S6 in FIG. 3). The mail transfer means 21 transmits the search result to the sending mail address (step S7 in FIG. 3).

The owner of the sender's mail address receives the search result from the mail transfer means 21, switches the mail type to the deletion request using the deletion request mail transmission means of the terminal a, and receives the mail to be deleted. mail address,
A deletion request mail in which the Message-Id (or transmission time) and the transmission side mail address are stored as header information is transmitted (Step S8 in FIG. 4). When the mail transfer means 21 of the mail server A receives the deletion request mail and confirms that the mail type is for the deletion request, it deletes the information of the mail to be deleted from the transmission history file 22 (update of the transmission history file). : Step S9 in FIG. Thereafter, the mail transfer unit 21 transfers the deletion request mail to the mail server B (Step S10 in FIG. 4). When the mail storage means 31 of the mail server B receives the transferred deletion request mail and confirms that the mail type is for deletion request,
The mail post 32 is searched based on the sender's mail address and Message-Id (or transmission time), and if there is a corresponding mail, it is deleted from the mail post 32.

(Other Embodiments) Next, other embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 5 is a diagram showing the configuration of another embodiment of the electronic mail system with the mail deletion function of the present invention. In the present embodiment, terminal a1, terminal a2,.
n in the embodiment shown in FIG. 1 in that there are a plurality of terminals as shown in FIG. 1 and that the owner of the sending mail address can send mail from each terminal by the sending mail address. The configuration is different from that of FIG.
Is the same as that shown in FIG.

Next, the overall operation of the present embodiment will be described in detail with reference to FIGS. 6, 7 and 8. FIGS. 6, 7 and 8 are diagrams in which the mail processing procedure is added to the electronic mail system with the mail deletion function shown in FIG.

The owner of the sending mail address wants to send a mail, and sends a normal mail from the mail sending means 111 of the terminal a1 (step T1 in FIG. 5). When the mail transfer means 21 of the mail server A receives the mail and confirms that the mail type is a normal mail,
The sending mail address, Mess
Information such as age-Id (or transmission time) and title is newly added (update of transmission history file: Step T2 in FIG. 6). Thereafter, the mail transfer means 21 transfers the normal mail to the mail server B (Step T3 in FIG. 6). When the mail storing means 31 of the mail server B receives the normal mail and confirms that the mail type is the normal mail,
The normal mail is stored in the mail post 32 (step T4 in FIG. 6).

Next, the owner of the sender's mail address wants to delete the sent mail from another terminal, for example, because he / she moves away from the terminal a1. First, in order to inquire about the transmitted mail recorded in the transmission history file 22, an inquiry mail whose mail type is switched to inquiry is transmitted from the inquiry mail transmitting unit 122 using the terminal a2 (see FIG. 7). Step T
5). When the mail transfer means 21 of the mail server A receives the inquiry mail and confirms that the mail type is for inquiry, the mail transfer means 21 retains the history of the mail transmitted from the same mail address, which is retained for a period set in advance in the system. Is searched in the transmission history file 22 based on the transmission side mail address (step T6 in FIG. 7). The mail transfer means 21 transmits the search result to the sending mail address (step T7 in FIG. 7).

Thereafter, the owner of the sender's mail address receives the search result collected by using the terminal a2, and further moves to another terminal an for reasons such as further away from the terminal a2.
, The mail type is switched to the deletion request using the deletion request mail transmission unit 14n, and the message to be deleted is deleted.
A deletion request mail in which the e-Id (or transmission time) and the sender's mail address are stored as header information is transmitted (step T8 in FIG. 8). When the mail transfer means 21 of the mail server A receives the deletion request mail and confirms that the mail type is for deletion request, the transmission history file 2
From step 2, the information of the mail is deleted (update of transmission history file: step T9 in FIG. 8). Thereafter, the mail transfer means 21 transfers the deletion request mail to the mail server B (Step T10 in FIG. 8). The mail storage means 31 of the mail server B receives the transferred deletion request mail and confirms that the mail type is for the deletion request. 32, and if there is a corresponding mail, it is deleted from the mail post 32.

In the above embodiment, the mail server A is connected to a specific ISP (Internet
Service Provider).

FIG. 9 is a diagram showing an embodiment in which the mail server A is configured to be held by a specific ISP. In the case of this embodiment, dial-up access points (AP1, AP2,..., AP) are used as means for accessing the mail server A held by the ISP.
n) is arranged and configured in the ISP network as shown in FIG. Even in the case of this embodiment, the entire operation is performed from each of the terminals a1, a2,..., An via each access point, and the transmission history file is centrally managed in the mail server A owned by the ISP. Although different, the basic operation is the same as described above.

In the above embodiment, the transmission history file is described as an example in which the information of the e-mail (normal mail) stored as the transmission history is information in the header information. Needless to say, the information can be configured to be the information of the mail itself.

In the above-described embodiment, each mail server A, B and terminal can be typically configured using a mail server computer and a terminal computer, respectively. It is preferable that the functions and means shown in FIGS. 5 and 9 and the processing procedures shown in FIGS. 2 to 4 and FIGS. 6 to 8 are realized by control by computer software.

[0046]

According to the present invention, since a system configuration in which the transmission history file is centrally managed by the mail server A is adopted, a deletion request mail can be transmitted from any terminal, and as a result, wherever you are, Also accesses the mail server A using a means such as dial-up to the nearest access point without carrying the terminal a,
It is possible to delete sent mail.

Also, even if the transmission history file is distributed to each terminal and the contents are shared (synchronized) even if the method of having the transmission history file as in the conventional terminal is used, a new mechanism for sharing the contents is newly added. However, in the present invention, there is no need to synchronize the contents of such a file, and it is possible to transmit a deletion request mail from any terminal.

Further, by using only the header information of the mail or only a part thereof as the information of the electronic mail stored as the transmission history in the transmission side mail server, it is possible to minimize the history information for a huge terminal. .

[Brief description of the drawings]

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

FIG. 2 is a diagram illustrating a processing procedure when a normal mail is transmitted from a terminal to a transmitting mail server.

FIG. 3 is a diagram showing a processing procedure when an inquiry mail is transmitted from a terminal to a transmitting mail server.

FIG. 4 is a diagram showing a processing procedure when a deletion request mail is transmitted from a terminal to a transmitting mail server.

FIG. 5 is a diagram showing the configuration of another embodiment of the electronic mail system with a mail deletion function of the present invention.

FIG. 6 is a diagram showing a processing procedure when a normal mail is transmitted from a terminal to a transmitting mail server.

FIG. 7 is a diagram showing a processing procedure when an inquiry mail is transmitted from a terminal to a transmitting mail server.

FIG. 8 is a diagram showing a processing procedure when transmitting a deletion request mail from a terminal to a transmitting mail server.

FIG. 9 shows that the mail server A is connected to a specific ISP (Internet S
FIG. 13 is a diagram illustrating another embodiment configured to be owned by an (Service Provider).

FIG. 10 is a diagram showing a configuration of a conventional e-mail system with a mail deletion function.

[Explanation of symbols]

 11, 12 mail transmission means 13 search result mail reception means 14 deletion request mail transmission means 21 mail transfer means 22 transmission history file 31 mail storage means 32 mail post 41 mail reception means 42 received file A, B mail server a, b terminal

Claims (12)

[Claims] 1. An e-mail system with an e-mail deletion function for deleting a sent e-mail stored in a receiving mail server or a destination terminal by transmitting a deletion request mail from a terminal to a transmitting mail server. In the transmission mail server, a transmission history file for storing normal e-mail information as a transmission history for a certain period of time, an e-mail information received from a terminal is stored in the transmission history file, and a receiving mail server In response to the inquiry mail inquiring about the transmission history of the sent mail received from the terminal, the transmission history is searched from the transmission history file, and the search result mail including the transmission history is returned to the terminal, In response to the received request to delete the sent mail, Mail transfer means for deleting the transmission history of the file and transferring the received mail to the receiving mail server, the terminal comprising: a mail transmission means for transmitting the e-mail; an inquiry mail transmission means for transmitting the inquiry mail; An e-mail system with a mail deletion function, comprising: a search result mail receiving means for receiving a search result mail; and a deletion request mail transmitting means for transmitting the deletion request mail based on the search result mail. 2. The electronic mail system with a mail deletion function according to claim 1, wherein the sending mail server is arranged at an Internet service provider having a plurality of access points. 3. The electronic mail system with a mail deletion function according to claim 1, wherein the information of the electronic mail is header information including a source mail address, a message ID, and a transmission time. 4. A transmission-side mail server in an e-mail system with a mail deletion function for deleting a transmitted e-mail stored in a reception-side mail server or a destination terminal in response to a deletion request mail from a terminal. A transmission history file that stores normal e-mail information as a transmission history for a certain period of time, and stores normal e-mail information received from a terminal in the transmission history file and transfers the e-mail to a receiving mail server. In response to the inquiry mail inquiring about the transmission history of the transmitted mail received from the terminal, the transmission history file is searched for the transmission history of the inquiry, the search result mail including the transmission history is returned to the terminal, and received from the terminal. In response to the sent sent mail deletion request mail, the sent mail in the send history file A mail transfer means for deleting the transmission history of the mail and transferring the mail to the mail server of the reception side. 5. The transmission-side mail server in the e-mail system with a mail deletion function according to claim 4, wherein the transmission-side mail server is located at an Internet service provider that has a plurality of access points. . 6. The transmitting side in the electronic mail system with a mail deleting function according to claim 4, wherein the information of the electronic mail is header information including a source mail address, a message ID and a transmission time. Mail server. 7. A transmission history file for storing e-mail information received from a terminal as a transmission history for a certain period of time;
By transmitting a deletion request mail to a transmission mail server having a transfer means for transferring the electronic mail to a reception mail server, the transmitted e-mail stored in the reception mail server or the destination terminal is transmitted. A terminal in an e-mail system with an e-mail deletion function for deleting an e-mail, an e-mail transmission unit for transmitting an e-mail, an inquiry e-mail transmission unit for transmitting an e-mail inquiry of a transmission history of the transmitted e-mail, A search result mail receiving means for receiving a return of a search result mail including a transmission history of an inquiry from the server, and a deletion request mail sending means for transmitting the deletion request mail based on the search result mail, Terminal in an e-mail system with an e-mail deletion function. 8. The terminal according to claim 7, wherein the e-mail information is header information including a source mail address, a message ID, and a transmission time. 9. A computer of a transmission side mail server in an e-mail system with a mail deletion function for deleting a transmitted e-mail stored in a reception side mail server or a destination terminal in response to a deletion request mail from a terminal. A transmission history file function for storing information of ordinary e-mail as transmission history for a certain period of time, storing information of ordinary e-mail received from a terminal in the transmission history file and transferring the e-mail to a receiving mail server. A function for searching the transmission history of an inquiry from a transmission history file in response to an inquiry mail for inquiring the transmission history of transmitted mail received from the terminal, and returning a search result mail including the transmission history to the terminal; In response to the email requesting to delete the sent email received from An e-mail program that implements the function of deleting the transmission history of a file's sent mail and transferring it to the receiving mail server. 10. The electronic mail program according to claim 9, wherein the information of the electronic mail is header information including a source mail address, a message ID, or a transmission time. 11. A transmission history file for storing information of a normal e-mail received from a terminal as a transmission history for a certain period of time, and a transmission-side mail server including a transfer unit for transferring the e-mail to a reception-side mail server. E-mail that sends an e-mail to a terminal computer in an e-mail system with an e-mail deletion function that deletes a sent e-mail stored in a receiving mail server or a destination terminal by sending a deletion request mail A sending function, an inquiry mail sending function of sending an inquiry mail of the sent history of the sent mail, a search result mail receiving function of receiving a return of a search result mail including a sending history of the inquiry from the sending mail server for the inquiry mail, Delete the transmission history mail based on the search result mail An e-mail program for implementing a deletion request mail transmission function of transmitting a deletion request mail requesting deletion. 12. The electronic mail program according to claim 11, wherein the electronic mail information is header information including a source mail address, a message ID, and a transmission time.