JP2013012037A - Electronic mail marketing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic mail marketing system in which advertisement distribution is performed by narrowing down a target from an action history of each user on a web site.SOLUTION: When a user terminal 1 accesses a specified web site 31, an access analysis server 4 stores access information transmitted from the user terminal 1 in an access information storage part 5, in accordance with a script tag 23 which is embedded in the web page. When an extraction condition of the access information transmitted from a client terminal 6 of an operator of the web site 31 is received by extraction condition reception means 40, the access analysis server 4 extracts a user ID conforming to the extraction condition from the access storage part 5, in extraction means 50. At a client side CL, an advertisement mail is distributed to a customer of the extracted user ID.

Description

  The present invention relates to an email marketing system that distributes advertisements using email.

  In recent years, behavior-targeted advertising methods have been adopted that target ads based on the access of registered users on the website and reduce the number of wasted advertisements. Will improve dramatically.

  In such an e-mail marketing system, a mail magazine with a unique user key of the user is distributed to a user who has registered for mail distribution, and the user who has received the mail magazine can use a URL in an article to There is known a customer information system that selects and issues a mail magazine suitable for the user when the user is accessed. In this case, the mail magazine to be issued is selected based on the user information collected from the user in advance at the time of registration from the mail magazine directed to the specific customer segment (see, for example, Patent Document 1).

  In addition, the preference tendency for each user is inferred from either or both of the data accessed by the user from the content distributed on the Internet shopping site and the data clicked by the user from the advertisement mail distributed by e-mail. Based on this, a recommendation system that distributes content suitable for the user's preference via an Internet shopping site or advertisement mail is known (see, for example, Patent Document 2).

JP 2001-350895 A JP 2004-21810 A

  However, the customer information system of Patent Document 1 is designed to determine the contents of mail to be distributed based on user information collected from the user when the customer registers for mail distribution as a member. There is a fault that can not grasp the interest and interest.

  Moreover, since the recommendation system of patent document 2 is inferring a user's individual preference tendency, many information factors other than a user's attribute information must be collected and statistically processed, and a system is complicated. . In addition, the inference rules need to be changed due to changes in interests and values of the world as a whole.

  The present invention is an e-mail marketing that performs targeted advertisement distribution based on arbitrary conditions set each time based on access information from a user to a website without using a complicated method such as inference. A system is provided.

  In order to solve the above problems, an e-mail marketing system according to the present invention is an e-mail marketing system that distributes advertisement e-mail to a user who is registered as a member when accessing a predetermined website. A user-side information terminal device used by the user, a script tag that is mounted on the web page of the website and is read by the user-side information terminal device, and an instruction of the script tag read by the user-side information terminal device Access information acquisition means for collecting access information including browsing history and user ID to be transmitted according to the above, extraction condition setting means for specifying an extraction condition for the access information, and the access information corresponding to the access information corresponding to the extraction condition Extracting user ID from the access analyzing means And a mail delivery means for storing the user ID and the email address of the user in association with each other, and transmitting the advertisement mail to the email address corresponding to the user ID extracted by the extraction means It is characterized by having.

  The extraction condition setting means is characterized in that an extraction condition is designated on the web. Further, the extraction condition setting means is characterized in that an extraction condition is designated on the web by an operator side terminal device operating the website.

  In addition, the extraction status is displayed on the web accessed by the operator-side information terminal device, and when the extraction by the extracting means is completed, the extraction status is accepted that accepts a download request from the operator-side information terminal device from the web It is characterized by comprising display means and output means for downloading the extraction result to the operator side information terminal device in response to the download request.

  Further, the access information acquisition means collects the user ID stored in a browser of the user terminal that has accessed the website.

  The access information acquisition unit collects the user ID included in the URL when the user terminal accesses the website through the URL of the website including the user ID set for each user. It is characterized by doing.

  Further, the URL including the user ID for each user is distributed in advance by e-mail individually for each user.

  As described above, the present invention is an electronic mail marketing system that distributes advertising mail to a user who is registered as a member when accessing a predetermined website, and the user side information terminal device used by the user And a script tag that is implemented on the web page of the website and that is read by the user-side information terminal device, and a browsing history and user ID that are transmitted according to instructions of the script tag that is read by the user-side information terminal device Access information acquisition means for collecting access information including: extraction condition setting means for specifying an extraction condition for the access information; and the user ID corresponding to the access information that matches the extraction condition from the access analysis means Extraction means for extracting, the user ID of the user and an email address; And a mail delivery means for sending the advertisement mail to the email address corresponding to the user ID extracted by the extraction means. By arbitrarily setting the extraction conditions, we can narrow down the user's e-mail in order to extract only users who really showed interest in a certain theme (for example, product or service) from the user's behavior history on the site. Advertisement distribution can be performed.

  Therefore, it is possible to e-mail the guidance information on “products / services that are currently interested / interested” to “users who are currently interested / interested”, improving the ROI rate of e-mail marketing, and more effective. An email marketing system is provided.

1 is a block diagram of a network configuration in which an access analysis apparatus according to an embodiment of the present invention performs access analysis. The functional configuration of the access analysis apparatus according to the embodiment of the present invention when collecting access information when the user ID is not set in the user terminal is shown in a block diagram. The flowchart of the operation | movement step of the user terminal and access analysis apparatus which concern on embodiment of this invention when collecting access information when the user ID is not set to the user terminal is shown. The functional configuration of the access analysis apparatus according to the embodiment of the present invention when collecting access information when the user ID is set in the user terminal is shown in a block diagram. The flowchart of the operation | movement step of the user terminal and access analysis apparatus which concern on embodiment of this invention when collecting access information when a user ID is set to the user terminal is shown. FIG. 2 is a block diagram showing a functional configuration of an access analysis apparatus according to an embodiment of the present invention when processing for storing an access log in an access information storage unit is performed. FIG. 2 is a block diagram showing a functional configuration of an access analysis apparatus according to an embodiment of the present invention when processing for extracting access information according to extraction conditions set by the client side is performed. 5 shows a flowchart of operation steps of an access analysis apparatus according to an embodiment of the present invention that extracts access information according to extraction conditions set by the client side. FIG. 2 is a block diagram showing a functional configuration of an access analysis apparatus according to an embodiment of the present invention when downloading access information extracted in response to a request from the client side. 5 is a flowchart of operation steps of an access analysis apparatus and a client terminal according to an embodiment of the present invention when downloading access information extracted in response to a request from the client side. The concrete input screen of an extraction condition setting means is shown. The concrete display screen of an extraction condition display means is shown.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an e-mail targeting system according to the present invention. A user (in this description, a general person who uses a website) is a user-side information terminal device 2 (hereinafter referred to as a user). The website 31 is accessed through the Internet 1 using a terminal. Although a plurality of web pages WP are set for the website 31, a plurality of websites 31 having different domains may be provided as shown in the figure.

  The operator of this website 31 operates the website 31 on the web server 3. In addition, the operator of the website 31 manages the email addresses of registered users, and the email delivery system 64 delivers email to the member users.

  The access analysis server 4 is a server managed by a provider that provides an access information analysis service, and this provider manages the access information by the user to the website 31 at the request of the operator. provide. Hereinafter, the operator is referred to as a client, and the entire system including the web server 3, the operator-side information terminal device 6 (hereinafter referred to as a client terminal), and the mail distribution system 64 is referred to as a client-side CL. On the other hand, the entire system including the access analysis server 4 and the access information storage unit 5 is referred to as a provider side B.

  The access information is transmitted to the access analysis server 4 at the user terminal 2 that has browsed the website 31. That is, the script tag 23 (FIG. 2) that is executed when the browser of the user terminal 2 is read is embedded in the web page WP. When the user terminal 2 reads the script tag 23, the script is accessed according to the instruction of the script tag 23. A web beacon 22 (FIG. 2) including information is created and transmitted to the access analysis server 4. The user terminal 2 transmits the access information to the access analysis server 4 based on the browser function set in the user terminal 2. The received access information is stored in the access information storage unit 5.

  The access information is information representing the browsing history and user ID of the web page WP by the user, and the access information defined in the script tag 23 in this embodiment is the company ID, site ID, user ID, document URL, referrer. And other access information.

  The above company ID is the ID that identifies the client that has contracted with the business operator, the site ID is the ID that manages one or more domains at once, and the user ID is the user's email address that is managed by the client. The attached unique ID and document URL are URLs accessed by the user, and the referrer is referer information of the URL accessed by the user.

  In addition to these, the defined access information includes parameters that can be freely set according to the requirements of each client, and “page category”, “product name”, “product price”, and the like are customized. Specifically, for example, in the case of a page category, it is set to extract from a page title or URL.

  The provider that provides the access analysis service manages the browsing status of the user to the web page WP from such access information, extracts necessary access information in response to a request from the client side, and extracts the extraction result to the client. Provide to the side.

  The business side B operates a website 41 that can be accessed only by contracted clients, and opens a client management page 44 in the website 41. Therefore, the client side CL accesses the client management page 44 at the client terminal 6 and inputs the conditions for extracting necessary access information from the access information to the website 31. It is possible to request extraction of access information necessary for In response to this request, the access analysis server 4 on the provider side B extracts access information that meets the extraction conditions and provides it to the client side CL.

  In such an e-mail marketing system, first, collection of access information by the access analysis server 4 when a user accesses the website 31 will be described.

  FIG. 2 is a block diagram showing a functional configuration of data processing performed by the user terminal 2 and the access analysis server 4 when the web page WP is accessed on the user terminal 2 in which the user ID is not set in the browser cookie. It is shown.

  In this case, an e-mail M for guiding the user terminal 2 to browse the specific website 31 is delivered to the user terminal 2 by the mail delivery system 64, and the URL described in the e-mail M is clicked. By doing so, the website 31 is browsed. A user ID is assigned to this URL for each user who transmits. Then, the user terminal 2 reads the web page WP of the website 31 accessed by clicking the URL, and the user can browse it.

  In addition to mail delivery of URLs with user IDs set by the mail delivery system 64, URLs are issued for each user using appropriate means such as document distribution, and the user inputs this URL as a key. Then, the web page WP may be accessed.

  A script tag 23 defining access information acquired by the access analysis server 4 is embedded in the read access page WP. As described above, the access information defined in the script tag 23 includes a company ID, a site ID, a user ID, a document URL, a referrer, and other access information customized for each client.

  The user terminal 2 executes the script tag 23 by the Javascript JS, generates the web beacon 22 representing the access information requested to be transmitted in accordance with the instruction content of the script tag 23, and creates the generated web beacon 22 It transmits to the access analysis server 4.

  Then, the access information acquisition unit 43 of the access analysis server 4 receives the web beacon 22. In this case, the document URL in the received access information includes the user ID, and the access information acquisition unit 43 This user ID is specified and stored in the cookie 21 of the browser of the user terminal 2 as a third party cookie. On the other hand, the access information acquisition unit 43 stores the access information received in association with the user ID as the generated access log 42. At this time, when the same client operates a plurality of subsites 31 having different domains, the access information includes a site ID, and the user does not browse all the subsites 31. The visit history of all subsites 31 is written in the cookie.

  When the user ID is not set in the cookie of the browser of the user terminal 2, the above data processing operation of the user terminal 2 and the access analysis server 4 is performed according to the flowchart of FIG.

  When the user clicks and accesses the URL for which the user ID is set from the user terminal 2 (S10), the user terminal 2 reads the information of the accessed web page and the user ID assigned to the clicked URL. Setting is performed (S11).

  Subsequently, the user terminal 2 executes the script tag 23 embedded in the web page WP, generates a web beacon 22 representing access information defined by the script tag 23, and transmits it to the access analysis server 4 ( S12).

  Then, the access analysis server 4 operates, and the access information acquisition unit 43 acquires access information from the web beacon 22 sent from the user terminal 2 (S13), and encrypts the user ID included in the document URL. (S14). Then, the user ID is set in the cookie 21 of the user terminal 2 (S15), the access information including the user ID is stored as the access log 42 (S16), and the process ends.

  Next, FIG. 4 shows functions of data processing performed by the user terminal 2 and the access analysis server 4 when the web page WP is accessed on the user terminal 2 in which the user ID is set in the cookie 21 of the browser. The configuration is shown in a block diagram.

  When the user accesses the website 31 from the URL specifying unit 21 by typing in a URL on the user terminal 2 or selecting it from the favorites menu, the user terminal 2 reads the web page WP. Then, the user terminal 2 executes the script tag 23 by Javascript JS embedded in the web page WP, generates the web beacon 22 representing the defined access information, and accesses the access analysis server 4 The generated web beacon 22 is transmitted to the access analysis server 4. This access information includes the user ID stored in the cookie 21 of the user terminal 2. The access information acquisition means 43 of the access analysis server 4 stores the access information sent in association with this user ID as the access log 42.

  Data processing operations of the user terminal 2 and the access analysis server 4 when the user ID is set in the cookie of the browser of the user terminal 2 are performed according to the flowchart of FIG. When the user terminal 2 accesses the website 31 (S20), the user terminal 2 reads the information of the accessed web page WP (S21), executes the script tag 23 embedded in the web page, and is defined. The web beacon 22 representing the access information is generated and transmitted to the access analysis server 4 (S22).

  And it becomes operation | movement in the access analysis server 4, and the access information acquisition means 43 acquires access information from the transmitted web beacon 22 (S23), and acquires the user ID preserve | saved at the cookie 21 of the user terminal 2 (S24). Then, the access information sent in association with the user ID is stored as the access log 42 (S26), and the process ends.

  The access analysis server 4 stores the access log 42 thus stored in the access information storage unit 5 at an appropriate timing, for example, every hour. As shown in FIG. 6, in the access analysis server 4, the access log capturing unit 43 classifies and logs the access log 42 according to the access date for each website and stores it in the access log data area 5 </ b> A of the access information storage unit 5. Store.

  Processing for extracting and providing information required by the client from the access log 42 accumulated in the access information storage unit 5 will be described.

  FIG. 7 is a block diagram showing the functional configurations of the access analysis server 4 and the client terminal 6 that perform processing for the client-side CL to set extraction conditions and extract data based on the conditions.

  The extraction conditions are set by the client side CL by logging in to the access analysis server 4 at the client terminal 6 and accessing the client management page 44 provided by the website 41. An extraction condition setting unit 45 is formed in the client management page 44 that accesses and reads the website 41 from the URL specification unit 61 of the client terminal 6, and the client-side CL displays the extraction condition displayed on the screen of the client terminal 6. An extraction condition is input to the setting means 45.

  FIG. 11 shows a specific input screen of the extraction condition setting means 45. The extraction name input unit 45A, the extraction period setting unit 45B, the total unit setting unit 45C, the rule setting unit 45D, and the filter setting for identifying the extraction are shown. A portion 45E is provided. The aggregation unit setting unit 45C can set daily, weekly, monthly, or unspecified.

  In FIG. 11, as an example of analyzing access information to the EC site, a case of extracting “a user who has added a product to the cart but has not completed settlement in the last 90 days” is illustrated. In this case, from the access information stored in the access log data area 5A of the access information storage unit 5, from the document URL and the user ID, “the product page and cart page were browsed, but the settlement did not occur. The user ID (cart abandoner) may be extracted.

  Since the document URL indicates the URL accessed by the user, the user who has followed such a trajectory from the URL record of the visited page can be specified by the user ID. For example, suppose that the URL of the product page includes the characters “product”, the URL of the cart page includes the characters “cart_view”, and the URL of the payment completion page includes the characters “purchase”. In order to search for the cart abandoner, the URL including the character string “product” is browsed from the document URL included in the access information, and the URL including the character string “cart_view” is browsed. In addition, the user who has not browsed the URL including the character string “purchase” is extracted.

  Therefore, three types of character strings to be compared are entered in the rule setting unit 45D, “product” as the first rule, “cart_view” as the second rule, and “purchase” as the third rule. In this example, three types of rules are entered in three rows, but the number of input rows is increased or decreased according to the number of rules to be set.

In the filter setting unit 45E, the filter condition combining this rule is entered, but the logical expression “1” is entered in the entry field a.
and 2 ”is entered to instruct the application of the first rule and the second rule, and the logical expression“ 3 ”is entered in the entry field b to instruct the non-application of the third rule, thereby giving up the user of the cart abandoner. ID can be extracted.

  Such a logical expression is expressed by “1”, “2”, “3”, “or”, “and”, “(”, “)”, “ It is input by operating each button of “all or”, “all and”, and “clear”, or directly by a keyboard operation. At this time, the buttons “1”, “2”, and “3” are displayed on the filter setting unit 45E according to the number of rules entered in the rule setting unit 45D.

  After entering the extraction conditions in this way on the input screen of the extraction condition setting means 45, enter the e-mail address in the e-mail notification destination entry field 45F for receiving the extraction completion notification from the operator side B, and click the extraction start button 45G. When clicked, the extraction condition is transmitted from the client terminal 6 to the access analysis server 4.

  The extraction condition receiving means 40 of the access analysis server 4 receives the extraction condition, and the company name identified by the extraction name for identifying the extraction condition from the transmitted data and the company ID inputted at the time of login. The identification data is created from the above and stored in the extraction result management database 46. Further, the extraction condition receiving means 40 sends the extracted extraction conditions to the extraction means 50. The set extraction condition can be saved for later reuse by clicking the save button 45H.

  The extraction means 50 searches the access log data area 5A of the access information storage unit 5 for an access log file related to the client requested for extraction using the company ID as a key, and finds an access log file that meets this extraction condition. Extract. Then, the extraction unit 50 stores the extracted access log file in the extraction result data area 5B of the access information storage unit 5, and the extraction process ends.

  The setting of extraction conditions by the client side CL and the above data processing operation of the access analysis server 4 and the client terminal 6 based on the set extraction conditions are performed according to the flowchart of FIG. The client terminal 6 inputs the extraction condition to the extraction condition setting means 45 of the read client management page 44 (S30), and then clicks the extraction button 45G displayed on the extraction condition setting means 45 to input it. The extracted conditions are sent from the client terminal 6 to the access analysis server 4 (S31).

  When the extraction condition receiving means 40 receives the extraction condition, it creates identification data indicating the extraction name and company ID and stores it in the extraction management database 46 (S32).

  The extraction unit 50 performs query conversion of the extraction condition request (S33), and acquires target data from the access log data area 5A of the access information storage unit 5 (S34). Specifically, the file of the access log 42 corresponding to the subsite and date specified by the extraction condition is acquired from the access log data area 5A. From there, the extraction means 50 narrows down and extracts the access log 42 corresponding to the set extraction condition (S35), and stores the extracted access log 42 in the extraction result data area 5B of the access information storage unit 5 (S36). ).

  FIG. 9 is a block diagram illustrating a functional configuration of data processing performed by the access analysis server 4 and the client terminal 6 when the access log 42 extracted according to the extraction condition on the client side is transmitted to the client terminal 6. .

  When the client side CL clicks the extraction start button 45G on the input screen of the extraction condition setting means 45 and transmits the extraction conditions to the access analysis server 4, an extraction status display means 48 is formed on the client management page 44. As a result, the monitor screen of the client terminal 6 transitions to the display screen of the extraction status display means 48.

  FIG. 12 shows a specific display screen of the extraction status display means 48. Extraction started by the access analysis server 4 is accumulated in the extraction history and displayed on the display unit 48E, and the status can also be confirmed. The (a) part of FIG. 12 displays an incomplete tab 48A because the access analysis server 4 is executing extraction, and “standby” is displayed in the status column 48C.

  When the extraction by the extraction means 50 of the access analysis server 4 is completed, the display of the extraction status display means 48 on the client management page 44 moves to the completion tab 48B. As a result, the monitor screen of the client terminal 6 transitions from the display of part (a) to the display of part (b), and “download” is displayed in the processing column 48D. By clicking “Download” in this state, the client terminal 62 can instruct the access analysis server 4 to download the extraction result. The access analysis server 4 also transmits a completion mail to the mail address entered in the mail notification destination entry field 45F of the extraction condition setting means 45 when the extraction condition is set.

  When download is instructed from the client terminal 6 to the access analysis server 4, the output means 47 of the access analysis server 4 takes out the extraction result stored in the extraction result data area 5B of the access information storage unit 5, and manages the extraction result. An extraction name and a company name corresponding to the extraction result stored in the database 46 are added and converted into the CSV file 49, and then transmitted to the download receiving means 62 of the client terminal 6.

  As a result, the client terminal 6 displays the received extraction result on the extraction result display screen 63. The extraction result is the user ID and date extracted by the document URL, the category of the access page, etc. within the period specified by the client side CL. In the extraction condition shown in the input screen example shown in FIG. 11, an ID list of users who have viewed the product page and cart page but have not settled is displayed.

  Then, the client CL side distributes the advertisement mail to the e-mail address corresponding to the user ID indicated in the extraction result by the mail distribution system 64.

  The data processing operations of the access analysis server 4 and the client terminal 6 relating to the download of the extraction result are performed according to the flowchart of FIG. On the client CL side, when “download” of the extraction status display means 48 displayed on the client terminal 6 is clicked to request the access analysis server 4 to download (S40), the output means 47 of the access analysis server 4 is the target. The access information extraction result is extracted from the extraction result data area 5B of the access information storage unit 5 (S41), and the extracted data and the extraction result management data stored in the extraction result management database 46 are converted into the CSV format (S42). The CSV file 49 is downloaded to the download receiving means 62 of the client terminal 6 (S43). Then, the client terminal 6 displays the extraction result sent by download (S44) and ends.

  On the client side CL, based on the extraction result, the mail delivery system 64 transmits an advertisement mail to an e-mail address corresponding to the user ID indicated in the extraction result. This advertisement mail has contents for recommending the purchase of goods or services related to the category of the access page specified in the extraction condition.

  In the present embodiment, the advertisement mail is distributed on the client side CL, but it may be performed on the provider side B of the access information analysis service, and when the provider side B performs the distribution immediately, A case where distribution is performed in accordance with an instruction from the client-side CL that has confirmed the extraction result can be considered.

  As described above, the email marketing system that analyzes the user's behavior on the website 41 from the browsing history and distributes the advertisement mail to the specific user increases the ROI of the website opened for various purposes. Can be used. As described above, in the EC site, a product can be added to the cart, but a limited approach can be performed by distributing advertisements to users who have not completed settlement.

  In addition, on sites operated by manufacturers, appealing discount campaigns to users who have searched for stores but have not completed reservations, and on travel agency sites, browse trips to specific tourist spots in summer By appealing the special feature page of the summer tour to the user who is doing, it can be connected to the closing.

  Therefore, unlike targeting based on attribute data (static data) at the time of member registration or past purchase history, advertisements related to the theme to users who have shown interest in a specific theme (for example, products or services) By performing the distribution, it is possible to appeal “a product / service with an interest / interest” to a “user with an interest / interest”.

  The present invention is an electronic mail marketing system that distributes advertisements by mail based on user access information on a website from a user terminal, and has industrial applicability.

2 User-side information terminal device (user terminal)
4 Access analysis server 5 Access information storage 6 Operator side information terminal device (client terminal)
23 Script tag 40 Extraction condition reception means 42 Extraction means 43 Access information acquisition means 44 Client management page 45 Extraction condition setting means 47 Output means 48 Extraction status display means 64 Mail distribution means

Claims (7)

An email marketing system that distributes advertisement emails to registered users when a registered user accesses a predetermined website,
A user-side information terminal device used by the user;
A script tag that is implemented on the web page of the website and is read by the user-side information terminal device;
An access information acquisition means for collecting access information including a browsing history and a user ID to be transmitted in accordance with an instruction of the script tag read by the user side information terminal device;
An extraction condition setting means for specifying an extraction condition of the access information;
Extraction means for extracting from the access analysis means the user ID corresponding to the access information that matches the extraction condition;
A mail delivery means for storing the user ID and an email address of the user in association with each other, and sending the advertisement mail to an email address corresponding to the user ID extracted by the extraction means;
An e-mail marketing system characterized by comprising:   The e-mail marketing system according to claim 1, wherein the extraction condition setting means specifies an extraction condition on the web.   The e-mail marketing system according to claim 2, wherein the extraction condition setting means specifies an extraction condition on the web by an operator side terminal device that operates the website. Extraction status display means for displaying an extraction status on the web accessed by the operator side information terminal device and accepting a download request by the operator side information terminal device from the web when extraction by the extraction means is completed When,
Output means for downloading the extraction result to the operator side information terminal device in response to the download request;
The e-mail marketing system according to claim 3, further comprising:   The e-mail marketing system according to claim 1, wherein the access information acquisition unit collects the user ID stored in a browser of the user terminal that has accessed the website.   The access information acquisition means collects the user ID included in the URL when the user terminal accesses the website through a URL of the website including the user ID set for each user by the user terminal. The e-mail marketing system according to any one of claims 1 to 4.   The e-mail marketing system according to claim 6, wherein the URL including the user ID for each user is distributed in advance individually for each user by e-mail.

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