JP2005086291A - E-mail reception rejecting method and mail server - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the user of a mobile communication terminal from receiving unexpected junk e-mails. <P>SOLUTION: The user previously notifies a party from which an e-mail containing an URL in a text can be received about a set password, sets delivery refusal setting to a delivery refusal setting section 22 of a mail server 1, and the set password is stored in a set password storage 23. The mail server 1 retrieves whether or not the URL is contained in the text of an e-mail transmitted to the mail server 1, and if it is contained, the server 1 checks the section 22. If the section 22 is set at a delivery refusal setting, a delivery password retrieval section 12 retrieves a delivery password contained in the e-mail, and a password determination means 13 determines whether or not the delivery password matches a set password. When it is determined that the password matches, the e-mail is sent to the user, and it is determined that the password does not match, the e-mail is deleted. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an e-mail reception rejection method for rejecting an e-mail unintended by a user, and more particularly to an e-mail reception rejection method and a mail server for rejecting the reception of junk mail transmitted to an unspecified number of mobile communication terminals. It is.

  With the rapid advancement of communication technology in recent years, mobile communication terminals such as mobile phones and PHS (Personal Handyphone System) are not limited to calls but can be connected to the Internet or used as e-mails. In particular, since a mail transmission / reception function has been added to a mobile communication terminal, it has become possible to easily use mail as an information transmission means without having a computer such as a personal computer.

  When sending e-mail to a mobile communication terminal equipped with the above e-mail transmission / reception function, from a personal computer or workstation connected to the Internet or a mobile communication terminal equipped with e-mail transmission / reception function, A mail server operated by a so-called carrier, and when the destination mobile communication terminal can receive an e-mail, the e-mail is sent from the mail server as it is. Save it with, and send an email when it is ready to receive.

  As described above, since the mobile communication terminal has a mail transmission / reception function, it is possible to easily use e-mail as an information transmission means, but a user (hereinafter referred to as a user) of the mobile communication terminal does not intend. Receiving e-mail, so-called junk e-mail, has been disadvantageous for users.

  In other words, an unsolicited e-mail sending company uses a URL (Uniform Resource) of a site where the company is advertising to an unspecified number of users, instead of advertising or soliciting using conventional mail such as direct mail. By sending an email with Locator) in the body and guiding the user to a site operated by a trader, the company promotes many users while keeping costs low. Such spam is created by randomly creating email addresses and sending them to an unspecified number of users at once. Users who match randomly created email addresses receive spam emails. End up.

  However, such spam mail is mail that is not intended by the user, and causes many disadvantages for the user and the carrier. Generally, when mail is transmitted / received using a mobile communication terminal, the user is charged. Therefore, even when a junk mail unintended by the user is received, the user is charged. In addition, since spam mails send many electronic mails at once, the burden on the mail server operated by the carrier becomes very large, and there are cases where troubles occur in sending and receiving ordinary mails. In addition, when a junk mail arrives at an unexpected time, for example, at midnight, there is a problem that sleep is disturbed by a ringtone of the mail. In addition, there are many cases where sites operated by vendors are in conflict with criminal acts, and in such cases, they often develop into social problems.

  As a method of refusing reception of such junk mail, a method of changing the mail address is generally employed. However, for users, there is the trouble of changing the email address, and if the spam mailer identifies a changed email address, even if the email address is changed, spam is received again. May end up.

Therefore, in order to solve such a problem, a technique called domain designation reception is employed (for example, see Non-Patent Document 1). This domain-designated reception permits only reception of mail transmitted from a domain that the user may receive in advance. In general, vendors who send junk e-mails use a computer such as a personal computer to generate junk e-mail addresses randomly and send junk e-mails. This prevents spam mails from being received.
"Received domain", [online], NTT DoCoMo, Inc., [Search August 29, 2003], Internet <URL: http://www.nttdocomo.co.jp/info/f/meiwaku.html >

  In the domain-designated reception as described above, generally, the user is set to receive only mail from a domain such as a major carrier, and is set not to allow reception of mail from other providers. This is because most spam messages are randomly generated in large quantities using a computer such as a personal computer, and spam mails are sent from this computer, so only mail from domains such as major carriers is received. By doing so, it is not necessary to receive mail from a vendor that sends spam mails having other domains.

  However, in recent years, an increasing number of companies send spam emails by impersonating major carrier domains. As described above, when a spam mail is transmitted while pretending to be a domain such as a major carrier, the spam mail is received even if the domain designation is received.

  SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide an e-mail reception rejection method and a mail server that prevent spam mails from being received due to domain impersonation.

  The e-mail reception refusal method of the present invention confirms whether or not a URL is included in the text of a mail that has arrived at a mail server operated by a carrier or the like, and if included, stores user information stored in the mail server. Check the part. In the user information storage unit, when a URL is included in the text of the mail that has arrived at the mail server, a distribution rejection setting unit for determining whether to reject mail distribution to the user's mobile communication terminal and a set password storage Department and are included. As a result of checking the delivery refusal setting section, if it is set to refuse mail delivery, it is determined whether the delivery password is included in the subject or body of the mail that arrived at the mail server. Is included, the delivery password is compared with the set password, and if they match, an email is sent to the user's mobile communication terminal. In addition, even when the setting is made so as not to reject the delivery of the mail including the URL, the mail is transmitted to the user's mobile communication terminal. On the other hand, if it is set to reject delivery of mail containing URL, if the delivery password is not included or the delivery password and the set password do not match, the mail sent to the mail server Perform deletion.

  By using the e-mail reception refusal method and mail server of the present invention, it is possible to prevent a user using a mobile communication terminal from receiving junk mail, resulting in a disadvantage for the user. This can be prevented.

  Hereinafter, an e-mail reception rejection method and a mail server according to the present invention will be described. FIG. 1 is a schematic configuration diagram showing a communication network system having a mail server of the present invention. 1, the communication network system of the present invention includes a mail server 1, computers PC1 to PCn, base stations WB1 to WBn, mobile communication terminals MB1 to MBn, an Internet network 2, and a mobile communication network 3. Configured.

  The computers PC1 to PCn are computers such as personal computers and workstations, and are communicably connected to the Internet network 2 via a public telephone network, a service integrated digital network, a dedicated line network, or the like. The mobile communication terminals MB1 to MBn are mobile communication terminals such as mobile phones and PHS, and are connected to the mobile communication network 12 via the base stations WB1 to WBn so as to be communicable using a wireless line. The mobile communication network 3 is connected to a mail server 1 operated by a carrier. The mail server 1 transmits and receives mail between the mobile communication terminals MB1 to MBn, and the mobile communication terminals MB1 to MBn and the computers PC1 to PCn. Control the sending and receiving of emails to and from.

  FIG. 2 is a schematic configuration diagram of the mail server 1 of the present invention. In FIG. 2, the mail server 1 includes a condition determination unit 10 and a user information storage unit 20. Among these, the condition determination unit 10 includes a URL search unit 11, a user identification unit 12, a distribution password search unit 13, and a password determination unit 14. Further, the user information storage unit 20 is a storage area provided for each user, and includes a mail address storage unit 21, a delivery rejection setting unit 22, and a set password storage unit 23, respectively.

  As shown in FIG. 2, the mail address storage unit 21 is a storage area for individually storing each user's mail address. The delivery refusal setting unit 22 is provided for each user. When a mail with a URL is sent to the mail server 1, the delivery refusal setting unit 22 delivers the mail to the mobile communication terminal of the corresponding user as it is, or sets a password. This is a storage area for setting whether or not to perform a check. The setting password storage unit 23 is an area that is provided for each user and stores a setting password that is set in advance by the user when the distribution rejection setting unit 22 checks the password.

  Next, the URL search means 11 of the condition determination unit 10 searches the text of the mail sent to the mail server 1 and searches for a character string starting with “http: //” in the text. Means to do. The user specifying means 11 is means for specifying a destination user from the destination mail address of the mail sent to the mail server 1. The distribution password search means 13 is a means for searching for the distribution password embedded in the subject or body of the mail sent to the mail server 11. The password determination unit 14 is a unit that compares the setting password stored in the user setting password storage unit 23 specified by the user specifying unit 12 with the distribution password searched by the distribution password search unit 13.

  An e-mail reception rejection method by the mail server of the present invention configured as described above will be described with reference to FIGS.

  First, the user selectively sets the delivery rejection setting unit 22 and the setting password storage unit 23 of the mail server in order to make settings for rejecting the reception of junk mail. Hereinafter, a description will be given with reference to FIG.

  In FIG. 3, the user sends to the mail server 10 setting processing request data for setting the mail server delivery rejection setting unit 22 and the setting password storage unit 23 in the mail server 10 using his mobile communication terminal MBU. To send. When receiving the setting process request data, the mail server 10 transmits mail address acquisition request data for acquiring a mail address to the mobile communication terminal MBU in order to specify the mail address of the mobile communication terminal MBU. When receiving the mail address acquisition request data, the mobile communication terminal MBU returns data of its own mail address to the mail server 10. The mail server 10 specifies which user sets the delivery rejection setting unit 22 and the setting password storage unit 23 based on the mail address data returned. And the data of the distribution refusal setting request | requirement of setting a distribution refusal to the distribution refusal setting part 22 of the user information storage part 20 of an applicable user are transmitted with respect to the mobile communication terminal MBU. When the mobile communication terminal MBU receives the distribution rejection setting request data, the user transmits the distribution rejection setting registration data to the mail server 10 using the mobile communication terminal MBU. When the mail server 10 receives the distribution rejection setting registration data, the mail server 10 transmits setting password setting request data to the mobile communication terminal MBU so as to set the setting password. When the mobile communication terminal MBU receives the setting password setting request data, the user sets the setting password and returns the setting password registration data to the mail server 10.

  Here, the setting password set by the user needs to be notified in advance to a partner (for example, a friend or an acquaintance) who is permitted to receive a mail including a URL in the text by means of telephone or mail. In other words, it is necessary to notify the set password in advance in order to receive an email whose URL is included in the text from a friend or an acquaintance, etc., but not from a trader who sends spam mail. As described above, the setting for rejecting the reception of the junk mail is performed.

  Next, processing of the mail server 10 will be described with reference to FIG. When the mail server 10 receives a mail from the computers PC1 to PCn or the mobile communication terminals MB1 to MBn (step S1), the mail server 10 searches whether or not a URL is included in the body of the mail (step S2). Here, it is determined whether or not a URL is included depending on whether or not a character string starting from “http: //” is included in the body of the mail. The determination may be made based on whether or not a starting character string is included.

  As a result of searching the body of the mail and determining whether or not the URL is included (step S3), if not, if the URL is not included, the mail server 10 passes through the mobile communication network 3 and the base stations WB1 to WBn. A mail is transmitted to the user's mobile communication terminal MBU. This is due to the following reason.

  Normally, a mobile communication terminal is configured such that if there is a character string beginning with “http: //” in the body of an email, it can be connected to a linked site by pressing the button once. A trader who sends a spam mail uses the function of such a mobile communication terminal to guide the user to a site operated by the trader. Therefore, if the URL is not included in the body of the mail, the mail is sent to the user's mobile communication terminal MBU as it is, not as a mail from a supplier that sends the spam mail.

  Next, if it is determined in step S3 that a URL is included, user information is searched (step S4). In step S4, first, a search is made as to which user in the user information storage unit 20 the mail is transmitted from the destination of the mail transmitted to the mail server 10. Then, the mail server 10 confirms the distribution rejection setting unit 22 of the user information storage unit 20 of the corresponding user, and confirms whether or not the distribution rejection setting has been made (step S5). If the delivery refusal setting has not been set, the mail sent to the mail server 10 as it is is sent to the user's mobile communication terminal MBU, assuming that the user has not set the spam mail delivery refusal. On the other hand, if the delivery rejection setting has been made, the setting password is acquired from the setting password storage unit (step S6). Then, the mail server 10 acquires the distribution password from the subject or body of the mail transmitted to itself (step S7), and compares the acquired setting password with the distribution password (step S8). If they match as a result of the comparison, it is determined that the mail is from the other party who has previously notified the set password, and the mail is transmitted to the user's mobile communication terminal MBU (step S9). On the other hand, if they do not match, the mail server 10 moves the user as mail from a partner who has not notified the preset password in advance, that is, a partner who has not previously permitted reception of a mail whose URL is included in the text. The mail server 10 deletes the mail without transmitting the mail to the communication terminal MBU (step S10).

  Next, Example 1 of the present invention will be described with reference to FIGS. The setting password and the distribution password used in the present embodiment are “aaaa” having four alphanumeric characters, and the mail server 1 obtains the distribution password by searching the first four characters of the subject of the mail. Further, in this embodiment, the user performs the delivery refusal setting of the delivery refusal setting unit 22 of the mail server 10 using his / her mobile communication terminal MBU in advance, and the setting password storage unit includes four half-width alphanumeric characters “ “aaaa” is registered.

  First, a case will be described in which an email whose URL is included in the text is transmitted from a partner who has previously notified the set password, such as a friend or an acquaintance, to the user's mobile communication terminal MBU.

  FIG. 5 shows a screen that is input when a friend or acquaintance who has permitted the reception of a mail whose URL is included in the text transmits the mail to the user. As shown in FIG. 5, when sending a mail containing a URL to a user from a user friend or acquaintance who has been notified of a preset password, alphanumeric characters at the beginning of the subject Incorporate “aaaa” and enter the subject line. Then, in the text, a character string starting from “http: //” is written, a URL that the user wants to access is written, and an email is transmitted. At this time, a friend or an acquaintance who is notified of the set password in advance may send an email from the computers PC1 to PCn, or may send an email from the mobile communication terminals MB1 to MBn.

  Next, the mail sent from the computers PC1 to PCn or the mobile communication terminals MB1 to MBn is transmitted to the mail server 1 via the mobile communication network 3. When the mail server 1 receives the mail (step S1), a search is performed to determine whether or not a URL is included in the body of the mail (step S2). Since the URL is included in the mail text, the user information storage unit is searched (step S4). At this time, the user's delivery refusal setting unit 22 is searched from the mail destination, and it is confirmed whether or not the delivery refusal setting unit 22 has been set for delivery refusal (step S5). Since the delivery refusal setting unit 22 has been set in advance by the user, the mail server 10 acquires “aaaa”, which is the set password, from the set password storage unit 23 (step S6). Then, the mail server 10 acquires “aaaa” that is the first four characters of the subject of the transmitted mail (step S7), and compares the set password with the distribution password (step S8). Since both the setting password and the distribution password are “aaaa”, mail is transmitted to the user's mobile communication terminal MBU on the assumption that the passwords match (step S9).

  As described above, the mail containing the URL in the body text from the other party who has previously notified the set password is received.

  Next, a case will be described in which an email whose URL is included in the body text is transmitted from a partner who has not previously notified of the set password, for example, a trader or the like who sends a spam mail, to the user's mobile communication terminal MBU.

  FIG. 6 shows a screen that is input when a partner who has not been notified of the set password in advance, for example, a supplier that sends spam mail, sends a mail to the user. As shown in FIG. 6, since the setting password is not notified in advance for the supplier who transmits the junk mail, the setting password is not incorporated in the subject and the URL is described in the text. Send mail to the user. In most cases, a trader who sends spam mail creates a mail address at random using a computer, and the mail server 1 sends the created mail address from PC1 to PCn via the Internet network 2 and the mobile communication network 3. Sent to. When the mail server 1 receives the mail (step S1), a search is performed to determine whether or not a URL is included in the body of the mail (step S2). Since the URL is included in the mail body, user information is searched (step S4). At this time, the user's delivery refusal setting unit 22 is searched from the mail destination, and it is confirmed whether or not the delivery refusal setting unit 22 has been set for delivery refusal (step S5). Since the delivery refusal setting unit 22 has been set in advance by the user, the mail server 10 acquires “aaaa”, which is the set password, from the set password storage unit 23 (step S6). Then, the mail server 10 obtains “today”, which is four single-byte alphanumeric characters, that is, two full-width characters, described at the beginning of the subject of the transmitted mail (step S7), and the setting password and the distribution password. Are compared (step S8). Since the password of the distribution password is “today” while the setting password is “aaaa”, it is assumed that the passwords do not match, and the mail server does not transmit mail to the user's mobile communication terminal MBU. 1 deletes the mail (step S10).

  As described above, a mail that does not notify the set password in advance and includes a URL in a body text from a supplier sending spam mail or the like is not transmitted to the user's mobile communication terminal MBU and is deleted in the mail server 1. Is called.

  As described above, in this embodiment, four half-width alphanumeric characters are entered as the distribution password at the beginning of the subject. However, the present invention is not limited to this. For example, it may be placed at the beginning of the text as shown in FIG.

  In this embodiment, the distribution password and the setting password are four alphanumeric characters. However, the present invention is not limited to this, and two or eight characters may be arbitrarily set.

  Further, in the present embodiment, four half-width alphanumeric characters are entered as the distribution password at the beginning of the subject. However, the present invention is not limited to this, and the distribution password may be provided as a separate item as shown in FIG.

  The mobile communication terminal according to the present embodiment is intended for mobile phones, PHS, and the like, but is not limited thereto, and may be a personal portable terminal such as a PDA (Personal Digital Assistance).

  Further, in the present embodiment, the junk mail receiving side has been described for the mobile communication terminal, but the present invention is not limited to this, and the receiving side may be a computer connected to the Internet network 2 such as a personal computer.

  Furthermore, in the present embodiment, the partner who notifies the distribution password in advance is a friend or an acquaintance, but is not limited to this, and may be, for example, a distributor who distributes information. In such a case, the user needs to notify the distribution password in advance to a distributor who distributes information.

  As described above, in this embodiment, a delivery password is put at the beginning of the subject or body, the preset password registered is compared with the delivery password, and only the matched mail is sent to the user's mobile communication terminal MBU. By doing so, it is possible to suppress receiving junk mail. In other words, even if the email address randomly generated by the vendor sending spam is the same as the user's email address, spam email will not be sent to the user's mobile communication terminal MBU unless the spam sender sends the set password. It is because it is not transmitted.

It is a schematic block diagram of the communication network system containing the mail server in this invention. It is a schematic block diagram of the mail server in this invention. It is a figure which shows the exchange of data performed between the mobile communication terminal and mail server in this invention. It is a flowchart of the process which the mail server in this invention performs. It is a figure which shows one Example of a screen when the other party who was notified of the preset password in this invention transmits mail to a user. It is a figure which shows one Example of a screen when the other party who is not notified of the preset password in this invention transmits mail to a user. It is a figure which shows one Example in which the delivery password is integrated in the text in this invention. It is a figure which shows one Example in which the delivery password is provided as another item in this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mail server 10 Condition determination part 11 URL search means 12 User specification means 13 Distribution password search means 14 Password determination means 20 User information storage part 21 Mail address storage part 22 Distribution rejection setting part 23 Set password storage part MB1-MBn Mobile communication terminal PC1-PCn Computer

Claims (6)

A mail server connected to a mobile communication network and controlling mail sent and received between a mobile communication terminal connected wirelessly to the mobile communication network and a computer connected to the Internet network is sent from the computer. A URL search process for searching whether or not a URL is included in the body of
When the mail server includes a URL in the body of the mail, the mail is a mail from a party that the user to whom the mail is sent does not permit in advance, and the body includes the URL. Email rejection search process to search whether or not to allow
In the case where the mail server is a mail from a partner not permitted in advance in the mail reception refusal search process and has been set to not allow the reception of a mail whose URL is included in the text, A password determination process for determining whether the preset password registered in advance matches the distribution password included in the email;
A mail transmission process for transmitting the mail to the mail destination only when the mail server determines in the password determination process that the set password and the distribution password match. A method of rejecting e-mail reception.   The e-mail reception rejection method according to claim 1, wherein the mail server further controls mail transmitted / received between the mobile communication terminals or between the computers.   2. The method for rejecting reception of electronic mail according to claim 1, wherein the mobile communication terminal is a mobile phone.   The e-mail reception rejection method according to claim 1, wherein the distribution password is incorporated at the head of the subject of the mail.   The e-mail reception refusal method according to claim 1, wherein the e-mail has an item of the delivery password in addition to the subject and the body. A delivery refusal setting unit for setting whether or not to reject the reception of an email whose URL is included in the text for each user using the mobile communication terminal;
A user information storage unit comprising: a setting password storage unit for registering a setting password for receiving an email whose URL is included in the body text only from a partner permitted in advance by the user;
URL search means for searching whether a URL is included in the body of the email;
Means for searching from the mail address of the mail to which user of the user information storage unit the mail is addressed;
A distribution password search means for searching for a distribution password included in the email;
A condition determination unit comprising: a password determination unit that determines whether or not the distribution password matches the set password;
A mail server characterized by comprising:

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