JP2003229911A - Communication method, communication device and computer program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication method, a communication device and a computer program for suppressing the transmission of a message to a destination address where an error occurs in the past. <P>SOLUTION: The transmission error of electronic mail is received by a communication means 15, the mail address where the transmission error occurs is stored on a hard disk 13 by a CPU 11 and when a destination address is received by the communication means 15, it is decided by the CPU 11 whether or not the received destination mail address is stored on the hard disk 13. When it is decided that the address is stored, electronic mail for instructing the confirmation of the destination mail address is transmitted from the communication means 15 to the transmission source of the destination mail address by the CPU 11. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication method and communication device for transmitting a message such as an electronic mail, and a program for transmitting a message such as an electronic mail to a computer.

[0002]

2. Description of the Related Art In a communication network such as the Internet, messages such as electronic mail are transmitted and received. For example, when a website is provided on the Internet to provide a service, electronic mail is used as a means for contacting the user. For example, in a large file transfer service, the transfer source (sender) and the transfer destination (receiver) are contacted by electronic mail. Here, a large file is a large file that cannot be attached to an e-mail.

An outline of the file transfer service described above is shown in FIG. FIG. 10A shows a transmission terminal 20 that transmits a file and a reception terminal 3 that receives the file.
0 and the server 10 that provides the above-described file transfer service are illustrated. The transmission terminal 20 and the reception terminal 30 are connected to the server 10 via a communication network such as the Internet.

A file transfer procedure will be briefly described with reference to FIG. 10A as an example. From the sending terminal 20 to the server 10,
Send the transfer source and transfer destination email addresses and the file (arrow). The server 10 stores the received file in a hard disk (not shown), and sends the file address (URL: Unifor) to the received mail address of the transfer destination.
Send an e-mail containing the (Resource Locator) (arrow). The receiving terminal 30 that has received the e-mail accesses the address to download the file from the server 10 (arrow).

Further, the server 10 sends an electronic mail containing the address of the confirmation page indicating whether or not the transfer destination has received the file to the mail address of the transfer source (sending terminal 20) (arrow '). ). By accessing the confirmation page from the transmission terminal 20 (arrow '), it is possible to confirm whether or not the destination has received the file. Since the hard disk of the server 10 is used, it is possible to transfer a large file that cannot be attached to e-mail.

[0006]

However, the transfer source or transfer destination mail address received by the server 10 contains input errors at a constant rate. If the mail address is wrong, a transmission error (error notification mail) is returned to the transmitted electronic mail, as shown in FIG. The reception of such an error notification mail increases the load of the mail transmission / reception processing of the server 10.

If the mail address of the transfer destination is incorrect, the file address stored in the server 10 cannot be transferred because the transfer destination (recipient) cannot be notified of the file address. In such a case, it may be possible to perform processing such as confirming the transfer destination email address with the transfer source (sender). However, if the transfer source email address is incorrect, the transfer source (sender) And the file transfer service cannot be terminated normally.

Further, in addition to the transmission error, an electronic mail containing an unauthorized program such as a computer virus may be transmitted to the server 10. For example, when the device that receives the electronic mail transmitted from the server 10 is infected with a computer virus, to the sender of the mail received by the device (including the administrator of the server 10),
For example, sending an email with a computer virus duplicated and attached.

The server 10, which has received the e-mail with the computer virus attached thereto, carries out processing such as exterminating the computer virus, thus increasing the load on the server 10. In addition, when the server 10 is infected with a computer virus, the server 10 does not operate normally,
The file transfer service may not operate normally.

As described above, there is a possibility that the file transfer service cannot be operated normally due to an input error of the mail address or mail transmission to a device infected with a computer virus. However, it is not possible to determine whether there is an input error in the email address of the destination before sending or to determine whether the destination of the email is infected with a computer virus before sending.

The present invention has been made in view of such circumstances, and stores a transmission destination address of a warning object which may cause a problem in a storage device, and stores the received transmission destination address in the storage device. If so, by notifying the sender of the destination address of the warning, it is possible to reduce the problem that occurs when a message is sent to the destination address of the warning target, a communication device, and a computer program. The purpose is to provide.

Further, according to the present invention, the transmission destination address of the message in which the transmission error is detected is stored in the storage device, and when the received transmission destination address is stored in the storage device, the transmission destination address Provided are a communication method, a communication device, and a computer program capable of suppressing the occurrence of a message transmission error and reducing the load on the message transmission / reception processing by notifying the transmission source of the confirmation instruction of the transmission destination address. The purpose is to do.

Further, according to the present invention, when the transmission source address of a message in which an unauthorized program such as a computer virus is detected is stored in a storage device and the received transmission destination address is stored in the storage device, By notifying the destination address and / or the sender of the destination address of the confirmation instruction of the malicious program, the reception of the message including the malicious program is suppressed, and the detection and deletion processing of the malicious program are performed. It is an object of the present invention to provide a communication method, a communication device, and a computer program that can reduce the load on the computer.

Further, according to the present invention, a destination address of a warning target which may cause a problem is stored in a storage device, and when the received destination address is stored in the storage device, the acceptance is accepted. Disclosed is a communication method, a communication device, and a computer program that can avoid in advance a problem that occurs when a message is transmitted to a destination address of a warning by stopping the transmission of the message to the destination address. The purpose is to

[0015]

A communication method according to a first aspect of the present invention stores an information processing apparatus for executing a process including a message sending / receiving process and a message destination address receiving process, and data containing a message. In a communication method of transmitting a message to a received destination address using a storage device, is the destination address of the warning target stored in advance in the storage device, and is the received destination address stored in the storage device? The information processing apparatus has a step of determining whether or not the information is transmitted, and a step of transmitting a warning to the transmission source of the transmission destination address by the information processing apparatus when the received transmission destination address is stored in the storage device. Is characterized by.

A communication method according to a second aspect of the present invention uses an information processing device that executes a process of transmitting and receiving a message and a process of accepting a destination address of the message, and a storage device that stores data including the message. In a communication method for transmitting a message to a received destination address, a step of detecting a message transmission error in an information processing device, and a step of storing the destination address of the message in which the transmission error is detected in a storage device A step of determining in the information processing device whether or not the received transmission destination address is stored in the storage device; and when the received transmission destination address is stored in the storage device, the information processing device And a step of transmitting a confirmation instruction of the transmission destination address to the transmission source of the address.

A communication method according to a third aspect of the present invention uses an information processing device that executes a process of transmitting and receiving a message and a process of accepting a destination address of the message, and a storage device that stores data including the message. In a communication method of transmitting a message to a received destination address, a step of detecting an unauthorized program included in a received message by an information processing device and a source address of a message in which the unauthorized program is detected are stored. A step of storing in the device, a step of determining in the information processing device whether or not the received transmission destination address is stored in the storage device; and a step of processing information in the case where the received transmission destination address is stored in the storage device. The device instructs the destination address and / or the source of the destination address to confirm an unauthorized program. Characterized in that it comprises a step of transmitting a.

A communication method according to a fourth aspect of the present invention is the communication method according to any one of the first to third aspects, wherein when the accepted transmission destination address is stored in the storage device,
It is characterized in that the transmission of the message to the accepted destination address is stopped.

A communication device according to a fifth aspect of the present invention is a communication device that receives a destination address and sends a message to the received destination address, a storage unit that stores the destination address of the warning target, and the received destination address. And a notifying means for notifying the sender of the transmission destination address when the received transmission destination address is stored in the storage portion. Is characterized by.

According to a sixth aspect of the present invention, there is provided a communication device which receives a destination address and sends a message to the received destination address. The detecting device detects a message transmission error and a message in which the transmission error is detected. A storage unit for storing the destination address of the received data, a determination unit for determining whether or not the received transmission destination address is stored in the storage unit, and a case where the received transmission destination address is stored in the storage unit. And a notification unit for notifying the sender of the destination address of the confirmation instruction of the destination address.

A communication device according to a seventh aspect of the present invention is a communication device that accepts a destination address and sends a message to the accepted destination address, including receiving means for receiving the message, and an illegal program included in the received message. Detecting means for detecting, a storage section for storing a sender address of a message in which an unauthorized program is detected, a judging means for judging whether or not a received destination address is stored in the storage section, and a received transmission When the destination address is stored in the storage unit, it is provided with a notification unit for notifying the transmission destination address and / or the transmission source of the transmission destination address of a confirmation instruction of an unauthorized program.

In a communication device according to an eighth invention, in any one of the fifth to seventh inventions, when the accepted transmission destination address is stored in the storage unit, a message to the accepted transmission destination address is sent. The feature is that the transmission is stopped.

A computer program according to a ninth aspect of the present invention is a computer program for causing a computer to accept a destination address and transmitting a message to the accepted destination address, and a procedure for causing the computer to store a destination address of a warning target. , A procedure for causing the computer to determine whether or not the accepted destination address is included in the stored destination address, and a case where the computer includes the accepted destination address in the stored destination address , A procedure for notifying the sender of the received destination address of a warning.

A computer program according to the ninth invention is C
It can be recorded in a computer-readable recording medium such as a D-ROM, and can be read and executed by a computer.

In the first, fifth, and ninth aspects of the invention, the destination address of the warning that may cause a problem is stored in the storage device. For example, the mail address in which the transmission error has occurred or the mail address of the sender of the computer virus is stored in the storage device. It is determined whether or not the received destination address is stored in the storage device, and if it is determined that the destination address is stored, a warning is notified to the source of the destination address.

In the second and sixth aspects of the invention, a message transmission error is detected, and the destination address of the message in which the transmission error is detected is stored in the storage device. It is determined whether or not the received transmission destination address is stored in the storage device, and when it is determined that the transmission destination address is stored, the transmission source address transmission source is notified of the transmission destination address confirmation instruction.

In the third and seventh inventions, an unauthorized program such as a computer virus contained in the received message is detected, and the sender address of the message in which the unauthorized program is detected is stored in the storage device. It is determined whether the received destination address is stored in the storage device, and if it is determined that the destination address is stored, the unauthorized program is sent to the destination address and / or the source of the destination address. Notify the confirmation instruction of.

In the fourth and eighth inventions, when the accepted transmission destination address is stored in the storage unit, the transmission of the message to the accepted transmission destination address is stopped. For example, the electronic mail is not transmitted to the mail address where the transmission error occurred in the past. Similarly, no e-mail is sent to the mail address to which an unauthorized program such as a computer virus has been sent in the past.

[0029]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below with reference to the drawings showing the embodiments thereof. FIG. 1 shows an example of a communication system using a communication device according to the present invention. Figure 1
In the communication network 40 such as the Internet
Further, a server (communication device, central device) 10, a transmission terminal (terminal device) 20, and a reception terminal 30 are connected.

The server 10 is a device that provides a file transfer service and sends and receives electronic mail (message). The server 10 is used to operate a website on the Internet, receives a file transfer service on the website, and sends an electronic mail to the received transfer destination and transfer source mail addresses.

The transmitting terminal 20 and the receiving terminal 30 are devices that can access and browse websites on the Internet. The file is transmitted from the transmitting terminal 20 to the server 10, the receiving terminal 30 accesses the server 10, and the file is downloaded. The sending terminal 20 and the receiving terminal 30 are devices capable of sending and receiving electronic mail, and receive electronic mail from the server 10.

An example of the configuration of the server 10 is shown in FIG. The server 10 includes a CPU (Central Processing Unit) 11 and a D
A RAM (Random Access Memory) 12 such as a RAM, a hard disk 13, an external storage unit 14 such as a flexible disk drive or a CD-ROM drive, and a communication unit 15 that controls communication with the communication network 40.
An input means 16 such as a mouse and a keyboard, and an output means 17 such as a monitor and a printer are provided.

The CPU 11 controls the above-mentioned respective parts 12 to 17 of the server 10. Further, the CPU 11 stores in the RAM 12 the program or data received from the input unit 16 or the communication unit 15, the program or data read from the hard disk 13 or the external storage unit 14, and executes the program stored in the RAM 12 or calculates the data. The RAM 12 stores various processing results or temporary data used for various processing in the RAM 12. RA
The data such as the calculation result stored in M12 is stored in the hard disk 13 by the CPU 11 or the output unit 1
7 or from the communication means 15.

The CPU 11 sends electronic mail (message).
It operates as a means (detection means) for detecting the transmission error of. When a transmission error occurs, the error notification mail is received by the communication means 15, so that the transmission error can be detected by receiving the error notification mail.
The destination address of the electronic mail in which the transmission error is detected is stored in the hard disk 13 by the CPU 11. For example, as shown in FIG. 3A, it is added to the error history stored in the hard disk 13.

The CPU 11 also operates as means (determination means) for determining whether or not the received transmission destination address is stored in the error history of the hard disk 13.
When it is determined that the received transmission destination address is stored in the error history, the CPU 11 notifies the transmission source of the transmission destination address of the transmission destination address from the communication unit 15 (notification unit). To work as.

The communication means 15 operates as a means (reception means) for receiving an electronic mail. The CPU 11 operates as means (detection means) for detecting an unauthorized program such as a computer virus contained in the received electronic mail. For example, the virus check program is executed by the CPU 11
And check each received email for viruses. The sender address of the electronic mail in which the unauthorized program is detected is determined by the CPU 11 from the hard disk 13
Memorized in. For example, as shown in FIG. 3B, it is added to the virus history stored in the hard disk 13.

When it is determined that the received transmission destination address is stored in the virus history of the hard disk 13, the CPU 11 sends the illegal program to the transmission destination address or the transmission source of the transmission destination address from the communication unit 15. It operates as a means (notification means) for notifying the confirmation instruction.

When the received transmission destination address is stored in the error history or virus history of the hard disk 13, the CPU 11 stops the transmission of the message to the received transmission destination address.

By reading the computer program recorded on a recording medium such as a CD-ROM by the external storage means 14, storing it in the hard disk 13 and causing the CPU 11 to execute it, the CPU 11 can be operated as each of the above-mentioned means. The communication means 15 may be used to receive a computer program from another device connected to the communication network 40 and store the computer program in the hard disk 13.

FIG. 4 shows a configuration example of the transmission terminal 20. The transmission terminal 20, like the server 10, has a CPU 21 and a DR.
RAM 22 such as AM, hard disk 23, external storage means 24 such as flexible disk drive or CD-ROM drive, communication means 25 for controlling communication with the communication network 40, input means 26 such as mouse and keyboard, An output means 27 such as a monitor and a printer is provided.

Although not shown, the receiving terminal 30 is also provided with a CPU, a RAM, a hard disk, an external storage means, a communication means, an input means, and an output means, although not shown. .

The transmitting terminal 20 or the receiving terminal 30 activates browser software (program) stored in the hard disk 23 or a hard disk (not shown) to browse the website. Browser software is cookie, which is identification information exchanged between a server that operates a website and a terminal device that accesses the website.
Has the function of managing The cookie includes, for example, an identification number for identifying the terminal device and a transfer source mail address described later, and is stored in the hard disk of the transmitting terminal device 20.

Further, the transmitting terminal 20 or the receiving terminal 30 is
The mail transmission / reception software (program) stored in the hard disk 23 or a hard disk (not shown) is activated to send or receive an e-mail. Transmission and reception of electronic mail is performed using the communication unit 25 or a communication unit (not shown).

Next, transmission / reception of electronic mail using the communication apparatus according to the present invention will be described by taking a file transfer service as an example. FIG. 5 shows an example of a file transfer procedure. The website operated by the server 10 is accessed from the transmission terminal 20, and necessary information is input to the file transfer application page shown in FIG. 6 (S10). The application page is stored in the hard disk 13 of the server 10 and transmitted from the communication means 15 to the transmission terminal 20. The transmission terminal 20 receives the application page by the communication means 25 and outputs it to the output means 27. The user of the transmission terminal 20 inputs necessary items from the input means 26. The input data is stored in the RAM 22.

After inputting the required items, the input required items are transmitted (S12). For example, when the send button (not shown) on the application page is clicked by operating the mouse (input means 27), the CPU 21 causes the RAM 2
The necessary items stored in No. 2 are transmitted from the communication means 25 to the server 10. Here, the transfer source mail address entered in the “transfer source mail address” field of the application page is stored in the hard disk 23 as a cookie. Then, from the next time, the transfer source mail address stored in the hard disk 23 is read and displayed by the CPU 21 in the “transfer source mail address” field of the application page.

The transmitted necessary items are received by the communication means 15 of the server 10 (S14). The necessary items include the mail addresses of the transfer source (sender) and the transfer destination (receiver). The CPU 11 determines whether or not there is a problem with the transfer source and transfer destination mail addresses based on the error history and virus history stored in the hard disk 13 (S16). The determination is performed by searching the error history or the virus history for email addresses that match the email addresses of the transfer source and the transfer destination, and making a determination based on whether there is a hit (whether there is a problem).

When it is determined that there is a problem (S16: Y
ES) is the communication means 1 of the server 10 by the CPU 11.
A confirmation notice is transmitted from 5 to the transmission terminal 20 (S24).
For example, when the transfer source mail address is stored in the error history, a notification instructing confirmation of the transfer source mail address is transmitted. Similarly, when the transfer destination mail address is stored in the error history, a notification instructing confirmation of the transfer destination mail address is transmitted.

If the mail address of the transfer source is stored in the virus history, a notification recommending execution of virus check or the like is sent. Although not shown, when the transfer destination mail address is stored in the virus history, a notification recommending execution of a virus check or the like is transmitted to the transfer destination.

The above-mentioned notification is stored in the hard disk 13, and the notification according to the search result of the error history or the virus history is read from the hard disk 13 by the CPU 11 and transmitted from the communication means 15. The transmitted notification is received by the communication means 25 of the transmitting terminal 20 (S2
6) is output from the output means 27.

When it is determined that there is no problem (S16: N
O), the server 10 accepts the file transfer from the transmission terminal 20. The terminal device 20 transmits the file stored in the hard disk 23 from the communication means 25 (S
18). The transmitted file is the communication means 1 of the server 10.
5 is received (S20) and stored in the hard disk 13. After storing the file in the hard disk 13, the server 10 transfers the file (S2
Perform 2).

The file transfer procedure is shown in FIG. As in the conventional case, the communication means 15 transmits the file address to the transfer destination mail address, and further transmits the confirmation page address to the transfer source mail address (S40).
When a transmission error such as receiving an error notification mail is detected (S42: YES), the CPU 11 adds the mail address in which the transmission error is detected to the error history (S44).

When there is no transmission error (S42: NO)
Accepts access to the file from the receiving terminal 30, transfers the file to the receiving terminal 30, and accepts access to the confirmation page from the sending terminal 20 (S
46), and sends the confirmation page to the sending terminal 20.

Further, the server 10 receives the electronic mail by the communication means 15 at any time. The CPU 11 performs a virus check on the received e-mail. When a computer virus is detected, the CPU 11 adds the email address of the sender of the email containing the computer virus to the virus history.

Computer viruses can be detected by a mail server that handles electronic mail. For example, in FIG.
As shown in FIG. 1, the server 10 includes a web server 10a that operates a website, a mail server 10b that sends and receives electronic mail, and a file server 1 that stores files.
0c, the mail server 10b checks the computer virus contained in the email, and notifies the web server 10a of the email address of the sender of the email in which the computer virus was found. Also, an error notification mail due to a transmission error is sent to the mail server 10b.
The destination mail address in which the transmission error has occurred is notified to the web server 10a.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-mentioned embodiments. For example, the transmission of the electronic mail may be stopped when the number of transmission errors reaches a predetermined value or when the number of received virus mails reaches a predetermined value. It is also possible to set a period for stopping the transmission of the message and temporarily stop the transmission.

If the received transmission destination address is stored in the error history or virus history, the transmission of the message to the received transmission destination address is not stopped,
It can also be executed as it is. In this case, the notification of the transmission error or the computer virus is notified together with the notification of the file address or the confirmation page.

Also, the error history and the virus history can be created by associating the transfer source with the transfer destination. For example, as shown in FIG. 9A, each time an application for a file transfer service is accepted, the CPU 11 identifies an application number, an application date, a transfer source mail address, and a transfer destination 1 mail. The address and the like are stored in the hard disk 13. Then, when a transmission error or a virus is detected from the transfer source or the transfer destination 1 or the like, the “error” or “virus” of the corresponding mail address is updated from “0” to “1”.

In this case, the transfer destination mail address and the transfer source mail address are stored in association with each other.
It is possible to specify the transfer source mail address that specifies the transfer destination mail address in which the transmission error has occurred. For example, as shown in FIG. 9B, the number of errors occurring at the transmission destination can be obtained for each transmission source mail address. It is also possible to perform processing such as rejecting a service application from a transmission source in which the number of errors at the transfer destination is outstanding.

[0059]

According to the first, fifth, and ninth aspects of the invention, the destination address of the warning that may cause a problem is stored in the storage device, and the received destination address is the storage device. If the message is stored in, the problem can be reduced when the message is transmitted to the destination address of the warning by notifying the source of the destination address of the warning.

According to the second and sixth aspects of the present invention, the destination address of the message in which the transmission error is detected is stored in the storage device, and the received destination address is stored in the storage device. By notifying the sender of the destination address of the confirmation instruction of the destination address, it is possible to suppress the occurrence of a message transmission error and reduce the load on the message transmission / reception processing.

According to the third and seventh inventions, when the source address of the message in which the unauthorized program is detected is stored in the storage device and the received destination address is stored in the storage device, By notifying the destination address and / or the sender of the destination address of the confirmation instruction of the malicious program, the reception of the message including the malicious program is suppressed, and the detection and deletion processing of the malicious program are performed. It is possible to reduce the load on the.

According to the fourth and eighth aspects of the invention, the destination address of the warning that may cause a problem is stored in the storage device, and the received destination address is stored in the storage device. In this case, by stopping the transmission of the message to the accepted destination address, it is possible to avoid in advance the problem that occurs when the message is transmitted to the destination address of the warning target.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a communication system using a communication device according to the present invention.

FIG. 2 is a block diagram showing a configuration example of a server shown in FIG.

FIG. 3 is a diagram showing an example of an error history and a virus history stored in the server shown in FIG.

FIG. 4 is a block diagram showing a configuration example of a transmission terminal shown in FIG.

FIG. 5 is a flowchart showing an example of a file transfer procedure.

FIG. 6 is a diagram showing an example of an application page.

FIG. 7 is a flowchart showing an example of a file transfer procedure.

FIG. 8 is a diagram illustrating another configuration example of a server.

FIG. 9 is a diagram showing another example of an error history and a virus history.

FIG. 10 is a diagram showing an outline of a conventional file transfer service.

[Explanation of symbols]

10 servers (communication device, central device) 11 CPU (determination means, detection means, information processing device) 13 Hard disk (storage unit, storage device) 15 Communication means (notification means, reception means) 20 Sending terminal (terminal device)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Houji Uchibori             4-1-2 Hirano-cho, Chuo-ku, Osaka-shi, Osaka Prefecture               Within Osaka Gas Co., Ltd. (72) Inventor Akira Okamoto             4-1-2 Hirano-cho, Chuo-ku, Osaka-shi, Osaka Prefecture               Within Osaka Gas Co., Ltd. F-term (reference) 5K030 HA05 HB28 HC01 LD11 LD12

Claims (9)

[Claims] 1. An information processing apparatus that executes processing including message transmission / reception processing and reception processing of a transmission destination address of the message, and a storage device that stores data including the message, to the received transmission destination address. In the communication method of transmitting a message, a step of pre-storing a destination address of a warning target in a storage device and determining whether or not the received destination address is stored in the storage device by an information processing device, When the received destination address is stored in the storage device, the information processing device transmits a warning to the source of the destination address. 2. To the received destination address by using an information processing device that executes a process of transmitting and receiving a message and a process of receiving a destination address of the message and a storage device that stores data including the message In a communication method for transmitting a message, a step of detecting a message transmission error in an information processing device, a step of storing a transmission destination address of a message in which a transmission error is detected in a storage device, and a reception destination address A step of determining in the information processing device whether or not it is stored in the storage device; and, if the accepted destination address is stored in the storage device, the information processing device causes the information processing device to send the destination address to the destination. And a step of transmitting an address confirmation instruction. 3. An information processing apparatus that executes a process including a message sending / receiving process and a process of receiving a message destination address, and a storage device that stores data including a message In a communication method for transmitting a message, a step of detecting an illegal program included in a received message by an information processing device, a step of storing a transmission source address of a message in which the illegal program is detected in a storage device, A step of determining in the information processing device whether or not the received transmission destination address is stored in the storage device; and, if the received transmission destination address is stored in the storage device, the information processing device And / or sending a confirmation instruction of an unauthorized program to the sender of the destination address Communication method, which comprises. 4. The information processing apparatus stops transmission of a message to the accepted destination address when the accepted destination address is stored in the storage device. The communication method according to any one of 1. 5. A communication device that receives a destination address and sends a message to the received destination address, wherein a storage unit that stores the destination address of the warning target, and the received destination address are stored in the storage unit. A communication device comprising: a determination unit that determines whether or not there is a destination address, and a notification unit that notifies a source of the destination address of a warning when the received destination address is stored in a storage unit. 6. A communication device, which receives a destination address and transmits a message to the received destination address, stores detection means for detecting a message transmission error, and stores a destination address of the message in which the transmission error is detected. A storage unit, a determination unit that determines whether or not the received transmission destination address is stored in the storage unit, and, if the received transmission destination address is stored in the storage unit, transmits to the transmission source of the transmission destination address. A communication device, comprising: notifying means for notifying a destination address confirmation instruction. 7. A communication device for receiving a destination address and transmitting a message to the received destination address, receiving means for receiving the message, detecting means for detecting an illegal program included in the received message, and illegal means. A storage unit that stores the source address of a message in which a program is detected, a determination unit that determines whether the received destination address is stored in the storage unit, and the received destination address that is stored in the storage unit If so, the communication device is provided with a notification means for notifying the transmission destination address and / or the transmission source of the transmission destination address of a confirmation instruction of an unauthorized program. 8. The method according to claim 5, wherein when the accepted transmission destination address is stored in the storage unit, the transmission of the message to the accepted transmission destination address is stopped. The communication device according to any one of claims. 9. A computer program for causing a computer to accept a destination address and sending a message to the accepted destination address, a procedure for storing the destination address of the warning target in the computer, and the received transmission to the computer. A procedure for determining whether or not the destination address is included in the stored destination address; and, if the received destination address is included in the stored destination address by the computer, the received destination address And a procedure for notifying the sender of the warning.