Content mail distribution system

The present invention relates to a content mail delivery system that delivers a content mail containing content data to a user terminal such as a mobile phone owned by the user.

Conventionally, in a content service that distributes various contents to a user terminal owned by the user, for example, a mobile phone and collects a content fee, for example, a fortune-telling site, the user collects a monthly usage fee. At the same time, it is necessary to access each site such as a fortune-telling site in order to obtain the content information.

<p> Therefore, the user needs a packet fee or the like in addition to the above-mentioned usage fee, and there is a problem that the burden for using these content services is heavy.</p><p> In addition, on the provider side that provides these contents to users, in order to provide these contents to users, a site is constructed and the usage fee for accessing these sites is used as the user's telephone charge. For example, it is necessary to obtain approval from a mobile phone company (carrier) in order to collect the content on behalf of the user, and there is a problem that it is difficult to easily provide the content to the user and make a profit.</p><p> The present invention has been made by paying attention to such a problem, and the user can use the content service at a low cost, and the content provider can easily provide the content to the user. The purpose is to provide a content mail delivery system that can be provided and profitable.</p>

<p> In order to solve the above problems, the content mail delivery system according to claim 1 of the present invention is used by a user who has a user terminal having a function of connecting to an Internet network and a function of sending and receiving e-mail. The user terminal is provided with a storage unit for storing an adapter identification information that is sold in exchange for a price and can individually identify each adapter and a destination e-mail address of a request e-mail including the adapter identification information. The adapter unit that can be attached to the adapter unit and the adapter that is stored in the storage unit at least for the destination e-mail address stored in the storage unit of the adapter unit by attaching the adapter unit. A user terminal that sends a request e-mail containing identification information, and The content data provided to the user is stored, and the transmission count identification information that can specify the transmission count of the content mail including the content data is stored in association with the adapter identification information stored in the storage unit of each adapter unit. A storage means for storing the usage count management table, a receiving means for receiving the request e-mail transmitted from the user terminal, and the received request e-mail based on the reception of the request e-mail. On the condition that the number of transmissions specified from the transmission number identification information stored in the usage number management table in association with the adapter identification information included in the above has not reached the preset upper limit number of transmissions. An opportunity to send the content mail based on the content mail reply means for replying the content mail containing the content data to the user terminal of the sender of the request mail and the transmission of the content mail from the content mail reply means. The transmission number identification information stored in the usage number management table in association with the adapter identification information included in the request e-mail received by the receiving means is transmitted specified from the transmission number identification information. It is characterized by consisting of a server computer provided with a transmission count specific information updating means for updating the transmission count, which is obtained by adding 1 to the number of times, to identifiable information. According to this feature, the user purchases the adapter unit in exchange for the usage fee of the content service, and attaches the purchased adapter unit to the user terminal owned by the user, thereby setting the content preset. Since content mail containing content data can be received until the maximum number of times the mail can be sent is reached, the user does not need to pay a lot of packet charges other than the usage fee, and the content service is inexpensive. Can be used, and the content provider can easily provide the content to the user to make a profit.</p><p> The content mail delivery system according to claim 2 of the present invention is the content mail delivery system according to claim 1, and the storage means of the server computer is an electronic device of a user terminal to which each content mail is sent. It is characterized by including an e-mail address storage means in which an e-mail address and a cryptographic information specific information capable of identifying the cryptographic information inserted in the content e-mail sent to the e-mail address are stored in association with each other. According to this feature, even if the content data contained in the content mail returned to the user is illegally diverted, the e-mail address of the user who delivered the content mail containing the content data used for the diversion is used. It will be possible to identify these unauthorized users.</p><p> The content mail delivery system according to claim 3 of the present invention is the content mail delivery system according to claim 1 or 2, characterized in that the content data includes fortune-telling content data or horse racing prediction content data. There is. According to this feature, the user can receive a content mail containing fortune-telling content data or horse racing prediction content data.</p><p> The content mail delivery system according to claim 4 of the present invention is the content mail delivery system according to any one of claims 1 to 3, wherein the user terminal is a mobile phone. According to this feature, the user can receive the content mail and acquire the content data even when he / she is away from home.</p>

Examples of the present invention will be described below.

FIG. 1 is a diagram showing a configuration of a content mail delivery system (hereinafter, abbreviated as a delivery system) of the present embodiment to which the present invention is applied.

As shown in FIG. 1, the distribution system of this embodiment includes adapter units 3a, 3b ... In which adapter IDs as adapter identification information that can identify each adapter are stored, and the adapter units 3a, 3b. Provided to mobile phones 2a, 2b ... and access users a, b ... as user terminals that are formed to be wearable and have a function to connect to the Internet network and a function to send and receive e-mail. The content data to be stored is stored, and the access user a, b ... requests the content data including the adapter ID from the mobile phones 2a, 2b ... equipped with the adapter units 3a, 3b ... When the request e-mail is received, the total number of transmissions of the content data to the access users a, b ... has not reached the preset maximum number of transmissions for each access user a, b ... Is mainly composed of a server computer 1 as a server computer that generates a content mail including the content data and transmits the generated content mail to the mobile phones 2a, 2b ....

As shown in FIG. 2, the server computer 1 in this embodiment receives a request e-mail requesting content data including a ROM for storing a CPU control program and an adapter ID from mobile phones 2a, 2b ... It is a condition that the total number of times of request e-mail reception processing and content data transmission to access users a, b ... does not reach the preset maximum number of transmissions for each access user a, b ... CPU that executes processing programs to perform various processes such as content mail generation processing that generates content mail containing content data and content mail reply processing that sends content mail to mobile phones 2a, 2b ... A control unit 101 having a RAM for writing and reading necessary data, a storage unit 102 storing the above-mentioned various processing programs and various data tables shown in FIG. 3, and a mobile phone 2a via an Internet network. It is composed of 2b ... and a communication unit 103 for transmitting and receiving data, and is regarded as a normal server computer capable of relatively high-speed arithmetic processing.

Further, as shown in FIG. 3, the storage unit 102 of the server computer 1 has a system address as an e-mail address of the delivery system to which the request e-mail is sent, the above-mentioned various programs, and content data. As a usage count management table in which the number of transmissions of content mail can be specified for each access user a, b ... in association with the image file and the adapter ID, and the remaining number of transmissions as specific information is registered. The usage management table (see FIG. 3 (a)) and the content table for registering the content data in this embodiment (see FIG. 3 (b)) are stored. That is, the storage unit 102 of the server computer 1 corresponds to the storage means of the present invention.

Next, the usage management table (see FIG. 3A) stored in the storage unit 102 of the server computer 1 will be described. The adapter units 3a, 3b .. The phone number that is the own station number of the mobile phones 2a, 2b ... equipped with. And the preset maximum number of transmissions for each access user a, b ... are set as the initial value, and the content mail The number of times that the content mail can be sent to the access users a, b ... is registered by subtracting and updating by 1 for each transmission of the remaining number of transmissions, and the access usage that becomes the destination information of the content mail. The reply destination address where the mobile address, which is the email address of the mobile phones 2a, 2b ... of the person a, b ... is registered, and the access user a, b ..., which will be described in detail later, are determined. Cryptography that can identify the cryptographic information inserted in the content mail sent to the access users a, b ... The encryption as the specific information is registered, and the mobile phones of the access users a, b ... When a request email including an adapter ID was received from 2a, 2b ..., a content email was sent to access users a, b ... by determining whether the number of remaining transmissions reached 0. It is possible to determine whether or not the number of transmissions has reached a preset upper limit of transmissions. Further, the usage management table (see FIG. 3 (a)) in which the reply destination address to which the content mail is sent and the cipher as the encryption specific information are stored in association with each other is used in the e-mail address storage means of the present invention. Applicable.

Further, the remaining number of transmissions in the usage management table (see FIG. 3A) will be described. In this embodiment, by subtracting the remaining number of transmissions from the preset upper limit of transmissions, the access users have been accessed so far. The number of transmissions of the content mail sent to a, b ... (= maximum number of transmissions-remaining number of transmissions) can be calculated, and the remaining number of transmissions corresponds to the transmission number specific information of the present invention. In the present embodiment, the remaining number of transmissions is used as the number of transmissions specific information, but the present invention is not limited to this, and 0 is set as an initial value, and one is added and updated for each transmission of the content mail. The number of transmissions itself may be registered in the usage management table as the number of transmissions identification information, and the number of times the content mail is transmitted can be specified in the server computer 1 in this way as well.

Further, in the content table (see FIG. 3B) stored in the storage unit 102 of the server computer 1, the content data provided to the access users a, b ... in association with the content ID is registered. Has been done.

First, the content data of the content table (see Fig. 3 (b)) will be explained. The content data includes the constellations of birthdays, specifically Virgo, Taurus, Gemini, Capricorn, and Scorpio. It is an image file showing the fortune information of 12 constellations consisting of Virgo, Libra, Scorpio, Teiza, Capricorn, Gemini, and Taurus, so-called fortune-telling content, as shown in Fig. 3 (c). In addition, it is an image showing various fortune information such as today's overall luck, money luck, and lucky color. In addition, a plurality of image files (99 in this embodiment) are prepared for each constellation. For example, ohitsuji_01.jpg to ohitsuji_99.jpg are given as image file names to the constellations of Ohitsuji, and each has a different fortune. 99 image files showing information are prepared, and it is now possible to select and provide one of the image files as the fortune information of the constellation of the birthday to the access users a, b ... ing.

Next, the content ID of the content table (see FIG. 3B) will be described. The content ID is constellation identification information uniquely assigned to each constellation. Specifically, the content ID for Ohitsuji, Taurus, Gemini, Crab, Shishi, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius, and Pisces. "01" to "12" are given as. Further, as described above, a plurality of image files showing fortune information for each constellation are prepared as content data, and in this embodiment, the constellations are obtained for a plurality of image files showing the fortune information of each constellation. The content ID, which is the identification information, is associated with the content ID. For example, for ohitsuji_01.jpg ~ ohitsuji_99.jpg, which are multiple image files (99 in this example) showing the fortune information of Aries, the content ID is "01", which is the constellation identification information of Aries. It is associated as.

Further, the content table (see FIG. 3B) will be described. For each content ID, which is the constellation identification information, an image of any one of a plurality of image files associated with the constellation identification information. The file name is registered, and the registered image file name is periodically reselected and updated and registered every day. That is, the constellation fortune information as the content data associated with the constellation identification information as the content ID is updated and registered every day. Therefore, when the access user 2a, 2b ... sends a request e-mail containing the content ID, that is, the constellation identification information, the server computer 1 displays the constellation identification information of the birthday of the access user 2a, 2b ... Is specified, and a content mail containing the content data associated with the constellation identification information, that is, the image file showing the fortune information of the constellation of the birthday is returned, and the access users 2a, 2b ... are sent every day. You can get the fortune information of the constellation of the birthday to be renewed.

In this embodiment, the constellation identification information is registered as the content ID in the content table (see FIG. 3B), and the image file name of the image file indicating the constellation fortune information is registered as the content data. One of the image files showing the fortune information prepared in advance is selected and updated and registered every day, and the access users 2a, 2b ... are updated and registered every day. Although the fortune information of the constellation of the birthday can be obtained, the present invention is not limited to this, and the horse racing prediction content may be applied as the content data. Specifically, the racetrack identification information uniquely assigned to the racetrack is registered as the content ID, and the image file name of the image file indicating the expected result information of all races held at each racetrack is registered as the content data. The content data may be recreated and updated daily for each race date held at the racetrack, so that access users 2a, 2b ... want to purchase betting tickets. On the day of the race, you will be able to obtain forecast information on the results of all races on the racetrack where the race will be held.

As shown in FIG. 2, the mobile phones 2a, 2b ... in this embodiment have a ROM for storing a CPU control program and the like, a content mail reception process for receiving a content mail transmitted from the server computer 1, and content. Equipped with a CPU that executes processing programs for executing various processing such as mail display processing and execution processing of processing programs stored in adapter units 3a, 3b ..., and RAM for writing and reading necessary data. The control unit 201, various processing programs such as the above-mentioned content mail reception processing and content mail display processing, the own station number which is the telephone number assigned to the mobile phones 2a, 2b ..., and the mobile address which is the mail address. A storage unit 202 in which various information such as the above is stored, and a communication unit 203 for transmitting and receiving data to and from the adapter units 3a, 3b ... It consists of a wireless communication unit 204 for sending and receiving data to and from the server computer 1 via the Internet network by wireless communication, and is regarded as a normal mobile phone capable of sending and receiving and displaying e-mail including image files. ing.

As shown in FIG. 2, the adapter units 3a, 3b ... In this embodiment include a request e-mail generation process for generating a request e-mail including an adapter ID and requesting content data, a request e-mail transmission process, and the like. The processing program, the adapter ID uniquely assigned to the adapter units 3a, 3b ..., and the system address that is the e-mail address of the delivery system are registered, and the destination address that is used as the destination information of the request e-mail. , Storage unit 302 that stores various information such as content ID, which is constellation identification information for identifying an image file that indicates constellation fortune information as content data, and communication unit 203 of mobile phones 2a, 2b ... It is formed so that it can be attached to the mobile phone 2a, 2b ..., And is composed of a communication unit 303 for transmitting and receiving data including the processing program.

The adapter units 3a, 3b ... are sold to the access users a, b ... who own the mobile terminals 2a, 2b ... in exchange for the usage fee of the distribution system of this embodiment. .. For example, in the usage management table of the storage unit 101 of the server computer 1 (see FIG. 3A), the remaining number of transmissions of the adapter ID uniquely assigned to the adapter units 3a, 3b ... Is set to 999. Occasionally, the sales price of the adapter units 3a, 3b ... corresponds to the usage price for having the content mail delivered 999 times.

Next, in the distribution system of this embodiment, the flow of returning the content mail from the server computer 1 based on the transmission of the request mail from the mobile phones 2a, 2b ... is based on the flow chart shown in FIG. Will be described below.

For mobile phones 2a, 2b ..., first, whether the adapter units 3a, 3b ... are installed by the access users a, b ... (S1), or the content mail from the server computer 1 is received. Until there is (S11), it will be in a standby state (S1, S11).

In the standby state (S1, S11), when the access users a, b ... attach the adapter units 3a, 3b ... to the mobile phones 2a, 2b ..., the mobile phones 2a, 2b ... Performs request email generation processing to generate request emails that request content data based on various information stored in adapter units 3a, 3b ... (S2).

In the request e-mail of this embodiment, as shown in FIG. 4, the mobile address stored in the storage unit 202 of the mobile phones 2a, 2b ... is used as the source information, and the adapter units 3a, 3b are used as the destination information. The destination address, which is stored in the storage unit 302 of ... and indicates the system address which is the e-mail address of the delivery system, is also included in the text information or the header information of the request e-mail of the mobile phones 2a, 2b ... It is normal e-mail data including the own station number stored in the storage unit 202 and the image file in which the adapter ID and the content ID stored in the storage unit 302 of the adapter units 3a, 3b ... are set. ..

Next, the created request e-mail is sent to the destination information of the request e-mail, that is, the system address which is the e-mail address of the delivery system (S3), and the adapter units 3a, 3b ... Ends the processing of mobile phones 2a, 2b ... accompanying the installation of.

Next, the process performed by the server computer 1 will be described. First, the server computer 1 waits until an incoming request e-mail is received from the mobile phones 2a, 2b ... (S4).

In S4, when there is an incoming request e-mail, the request e-mail reception process for receiving the request e-mail is performed (S5), and it is determined whether or not the content of the received request e-mail is correct (S6). To explain specifically the case where the content of the request e-mail is judged to be correct, the sender of the request e-mail is mobile phone 2a, 2b ..., and the own station number, adapter ID, and content ID are all included. Only when the sender information of the request e-mail and the own station number are registered in the usage management table (see Fig. 3 (b)) in association with the adapter ID included in the request e-mail. The content of the request email is determined to be correct. When the content of the request e-mail is incorrect, the server computer 1 processes by moving to S14 and performing error processing such as sending an error e-mail indicating that the request e-mail is incorrect to the administrator of the server computer 1. To finish.

In S6, when checking the contents of the usage management table (see Fig. 3 (b)) to judge the correctness of the contents of the request e-mail, the telephone number associated with the adapter ID included in the request e-mail When it is detected that the number or reply address is not registered, it is determined that the newly purchased adapter units 3a, 3b ... are installed for the first time, that is, the new usage has started, and the request electronic The sender information and own station number included in the mail are registered as the reply destination address and telephone number of the usage management table (see Fig. 3 (b)), respectively. Furthermore, the remaining number of transmissions associated with the adapter ID and the encryption are initialized, and the process shifts to S7, and the server computer 1 continues processing.

When it is determined in S6 that the content of the request email is correct, the remaining number of transmissions is specified from the usage management table (see Fig. 3 (a)) based on the adapter ID included in the request email, and the remaining number of transmissions is specified. By determining whether or not is 0, it is determined whether or not the number of transmissions has reached the preset upper limit of transmissions (S7). When the maximum number of transmissions has been reached, the process shifts to S14 and performs error processing such as sending an error mail indicating that the maximum number of transmissions has been reached to the administrator of the server computer 1 to process the server computer 1. To finish.

When it is determined in S7 that the number of transmissions has not reached the maximum number of transmissions, the source information, own station number, adapter ID, and content ID included in the request e-mail are stored in the storage unit 102 of the server computer 1. Content mail generation process that generates content mail based on the system address, usage management table (see Fig. 3 (a)), content table (see Fig. 3 (b)), and image file (see Fig. 3 (c)). (S8).

As shown in FIG. 4, the content mail of this embodiment has the system address stored in the storage unit 102 of the server computer 1 as the source information and the mail addresses of the mobile phones 2a, 2b ... as the destination information. The reply destination address of the usage management table (see Fig. 3 (a)) in which the mobile phone address is registered is set, and the encrypted image file generated by the encrypted image file generation process described later is set in the text information. It is e-mail data including image files.

Explaining the encrypted image file generation process of this embodiment, the server computer 1 first identifies the encrypted information associated with the adapter ID included in the request e-mail in the usage management table (see FIG. 3 (a)). Identify the cipher as information. Then, a digital watermarking technique is applied to the cipher to convert it into cipher information that is specified by the cipher and is not perceived by access users a, b ... even if it is inserted into an image file. Next, in the content table (see Fig. 3 (b)), an image file as content data associated with the content ID included in the request email is specified, and encryption is performed by inserting encryption information into the image file. Generates an attached image file and ends the encrypted image file generation process.

Next, a request e-mail transmission process is performed to send the created content e-mail to the destination information of the content e-mail, that is, the mobile address which is the e-mail address of the mobile phones 2a, 2b ... (S9). That is, the control unit 101 of the server computer 1 that executes the content mail reply process corresponds to the content mail reply means of the present invention.

Next, the transmission count update process is performed by subtracting 1 from the remaining transmission count in the usage management table (see FIG. 3A). As described above, the number of transmissions (= maximum number of transmissions-remaining number of transmissions) can be calculated by subtracting the remaining number of transmissions corresponding to the specific information of the number of transmissions of the present invention from the preset maximum number of transmissions, and the remaining number of transmissions. Since the remaining number of transmissions obtained by subtracting 1 from the number of transmissions is information that can specify the number of transmissions obtained by adding 1 to the number of transmissions, the control unit 101 of the server computer 1 that executes the transmission number update process can transmit the present invention. It corresponds to the means for updating the specific information.

Explaining the processing of mobile phones 2a, 2b ... accompanying the incoming mail of the content mail returned from the server computer 1 in S9, the adapter units 3a, 3b ... are attached to the mobile phones 2a, 2b ... (S1), until there is an incoming content mail from the server computer 1 (S11), it is in a standby state (S1, S11), and in this standby state (S1, S11), an incoming content mail is received. If there is, the content mail reception process for receiving the content mail is performed (S12).

Next, the received content mail, that is, the content mail display process for displaying the encrypted image file of the body information of the content mail is performed (S13), and the processing of the mobile phones 2a, 2b ... accompanying the incoming content mail is completed. To do.

As described above, using the content mail delivery system of this embodiment, the access users a, b ... purchase the adapter units 3a, 3b ... in exchange for the content service usage fee, and the access user a, b ... By attaching the purchased adapter units 3a, 3b ... to your own mobile phone 2a, 2b ..., until the number of remaining transmissions in the usage management table (see Fig. 3 (a)) reaches 0. That is, until the preset maximum number of times of sending the content mail is reached, the content mail including the image file as the content data can be received. Therefore, for the access users a, b ..., other than the usage fee. Content services can be used at low cost without requiring a large amount of packet charges, etc., and content providers can easily provide content to access users a, b ... to make a profit. be able to.

In addition, even if the encrypted image file included in the content mail replied to the access users a, b ... and includes the image file as the content data is illegally diverted, the encryption used for the divertion It will be possible to identify the e-mail addresses of the access users a, b ... who delivered the content mail including the attached image file, and it will be possible to identify these unauthorized access users a, b ... ..

In addition, access users a, b ... include an image file composed of today's fortune information for each constellation as fortune-telling content data or result prediction information for all races for each racetrack as horse racing prediction content data. You can receive content mail.

In addition, access users a, b ... can receive content mails and acquire image files as content data even when they are out of the office by using mobile phones 2a, 2b ... it can.

Although examples of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these examples, and any changes or additions within the scope of the gist of the present invention are included in the present invention. Is done.

For example, in the above embodiment, the transmission count identification information that can specify the transmission count of the content mail is registered only in the server computer 1 as the remaining transmission count in the usage management table (see FIG. 3 (b)). The invention is not limited to this. For example, the mobile phones 2a, 2b ... or the adapter units 3a, 3b ... also store the transmission count specific information, and the transmission count specific information is stored in the content mail. The content mail was actually received by the mobile phones 2a, 2b ... on the server computer 1 by updating the content mail only after receiving the message and sending the request e-mail containing the information on the number of times of transmission to the server computer 1. Since the number of times can be grasped, the server computer 1 adjusts the number of times of transmission specific information based on the number of times of sending the content mail and the number of times of receiving the content mail, for example, the number of times of failure to receive (= number of times of transmission-number of times of reception) remains. It is possible to add to the number of transmissions.

Further, in the above embodiment, the server computer 1 transmits when it is determined that the content of the request e-mail transmitted from the mobile phones 2a, 2b ... Is incorrect, or when the number of times the content e-mail is transmitted is set in advance. When the maximum number of times is reached, an error mail is sent to the administrator of the content mail delivery system, but the present invention is not limited to this, and if the configuration is such that the error mail is not sent, an error occurs. The step of sending an e-mail can be omitted, and if the error e-mail is also sent to the mobile phones 2a, 2b ..., it is possible to grasp the occurrence of a problem by the access users a, b ...

Further, in the above embodiment, the adapter ID (12 digits) and the content ID (2 digits) having a smaller number of digits than the adapter ID are separately stored in the storage unit 302 of the adapter units 3a, 3b ... The present invention is not limited to this, and some digits of the adapter ID (12 digits) may be used, for example, the upper two digits may be used as the content ID (2 digits). Not only can the capacity of information stored in the storage unit 302 of the adapter units 3a, 3b ... and the capacity of information contained in the request email be reduced, but also the content ID in the request email generation process for generating the request email. Can be omitted from the storage unit 302 of the adapter units 3a, 3b ... and incorporated into the request e-mail, and the processing can be simplified.

Further, in the above embodiment, the server computer 1 inserts the encrypted information defined for each of the access users a, b ... into the content data and transmits the content data, and the content data is illegally diverted for access use. It is preferable because it is possible to identify the persons a, b ..., but the present invention is not limited to this, and the encrypted information defined for each of the users a, b ... who access the content data. May be sent without inserting, and in this case, in the content mail generation process for generating the content mail, the step of generating the encrypted information from the encryption and inserting the encrypted information into the image file is omitted. It can be done and the processing can be simplified.

Further, in the above embodiment, mobile phones 2a, 2b ... Are applied as user terminals, but the present invention is not limited to this, and images of computer terminals, PDA terminals, etc. as user terminals. A terminal capable of sending / receiving and displaying e-mails including files may be applied.

Further, in the above embodiment, when an image file is applied as the content data, the image file name of the image file is registered in the content table (see FIG. 3B) in association with the content ID, and the content data is distributed. Generates an encrypted image file in which an encryption is inserted into an image file to which an image file name is given, and transmits the encrypted image file to access users a, b .... Character information may be applied as content data, and in such a case, character information is registered in the content table (see Fig. 3 (b)) in association with the content ID. When the content data is distributed, the character information may be transmitted to the access users a, b ... without inserting the code.

<figref num="1">It is a system diagram which shows the structure of the content mail delivery system in the Example of this invention.</figref><figref num="2">It is a block diagram which shows the structure of the content mail delivery system.</figref><figref num="3">(a) is a diagram showing a usage management table, (b) is a diagram showing a content table, and (c) is a diagram showing an example of an image file.</figref><figref num="4">It is a figure which shows the processing content of the content mail delivery system.</figref>

Code description

1 Server computer 2a, 2b ... Mobile phone 3a, 3b ... Adapter unit 101 Control unit 102 Storage unit 103 Communication unit 201 Control unit 202 Storage unit 203 Communication unit 204 Wireless communication unit 302 Storage unit 303 Communication unit