JP2002108774A - Mail transfer system and storage medium - Google Patents

Abstract

(57) [Summary] An object of the present invention is to provide a mail transfer system that enables transfer of mail even when the data systems are not compatible between a transmission side and a reception side. SOLUTION: A member user registers in a mail transfer service site 1, has a mail address issued, and has another person send a mail to this mail address. The mail addressed to the member user is delivered to the mail transfer service site 1, and the mail transfer service site 1 notifies the member user of the incoming mail with the advertisement. The member user reads the mail with the converted data from the directory of the mail transfer service site 1 from the link of the incoming notification.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology in mail distribution using a network, and more particularly to a mail transfer system for providing a mail transfer service to a portable radio terminal such as a portable telephone or a PHS.

[0002]

2. Description of the Related Art In recent years, portable wireless terminals such as portable wireless terminals and PHS have been remarkably popularized. At present, one out of two people has a portable wireless terminal. In addition, the portable wireless terminal has an e-mail transmission / reception function. With the portable wireless terminal being widely held, an environment for using the e-mail is established, and the use of the e-mail is becoming common. .

[0003]

In an ordinary e-mail using the Internet, by using the data format of an HTML message, it is possible to send image and voice data in addition to plain text. However, the portable wireless terminal does not support HTML itself because of its weak display capability.
It corresponds to data in a special markup language such as HTML or HDML. The data format of e-mail on mobile wireless terminals is not uniform, and each telecommunications carrier that owns a line and provides communication services adopts its own data format. If they are different, there is no data compatibility. Therefore, data other than text data can be transmitted between portable wireless terminals of the same telecommunications carrier, but image and audio data cannot be transmitted and received normally between portable wireless terminals of different telecommunications carriers. Or you may not be able to send or receive at all. Also, the number of characters that can be transmitted and received differs for each telecommunications carrier in text sentences.

[0004] In view of the above problems, it is an object of the present invention to provide a mail transfer system that enables transfer of mail even when the data systems are not compatible between the transmission side and the reception side. Another object of the present invention is to provide a system for placing an advertisement in a transferred mail. It is still another object of the present invention to provide a system that realizes efficient advertisement publication by preventing the same advertisement from being published many times.

[0005]

In order to solve the above problems, a mail transfer system according to the present invention is premised on providing an electronic mail transfer service to a portable wireless terminal.
A mail format conversion unit and an incoming call notification unit are provided.

The mail format conversion means converts the received e-mail into a format compatible with the transfer destination portable radio terminal. Incoming notification means and an incoming notification for the received electronic mail is transmitted to the transfer destination portable terminal.

[0007] With this configuration, the mail transfer system allows the transfer destination portable wireless terminal to handle an e-mail in a format that is not supported.
The mail format conversion means converts the transfer destination portable wireless terminal into a corresponding format and transfers it. In addition, the mail transfer system according to the present invention can be configured to further include advertisement posting means for posting advertisement information in the converted electronic mail and the incoming call notification. In the case of this configuration, the advertisement information can be posted by the advertisement publishing means in the above-described incoming call notification and the e-mail transferred to the portable wireless terminal.

Further, for example, the system further comprises an advertisement distribution history information recording means for recording the number of times of posting of each advertisement information, and the advertisement selecting means, when there is a plurality of pieces of the advertisement information whose publishing conditions match with the user, By selecting a configuration in which the advertisement information with the smallest number is selected, the advertisement information can be efficiently posted.

[0009]

FIG. 1 is a diagram showing a system configuration of the present embodiment. FIG. 1 is a system configuration diagram of the present embodiment. In this system, a mail transfer service site 1 is connected to a mobile wireless terminal server 2 and an Internet connection server 3 of each telecommunications carrier via the Internet 4, and each mobile wireless terminal server 2 and the Internet connection server 3 have a plurality of The mobile wireless terminal 5 is connected. The mobile wireless terminal server 2 includes a mobile wireless terminal 5 such as a mobile phone and a PHS and the Internet 4.
, Which are operated by each telecommunications carrier. The Internet connection server 3 is a server that connects an information terminal 6 such as a personal computer to the Internet 4.

In this system, it is assumed that an electronic mail is transmitted from the information terminal 6 to the portable wireless terminal 5, or that an operating telecommunications carrier exchanges electronic mail between different portable wireless terminals 5. In the figure, the portable wireless terminal 5 and the information terminal 6 are the mail transmitting side, and the portable wireless terminal 5 is the mail receiving side.

The mail transfer service site 1 is registered as a member of this site, receives an e-mail addressed to a user who receives a mail transfer service by the present system (hereinafter referred to as a "member user"), and sends it to the portable radio terminal of the member user. The data is converted into a data format supported by the server 2 and then transferred to the portable wireless terminal 5 of the member user.

FIG. 2 is a diagram showing an exchange between the mail transfer service site 1, a mail sending side and a mail receiving side by the present system. The member user first registers his / her transfer destination address (the mail address of the portable wireless terminal 5 owned by him / her) and personal information in the mail transfer service site 1 in order to register as a member in this system. Then, the member user has a mail address issued to the mail transfer service site 1. The domain name of this mail address (hereinafter referred to as a transfer address) indicates the mail transfer service site 1 as a destination, and all mail transmitted with this transfer address as the destination mail address is delivered to the mail transfer service site 1. .

[0013] Next, the member user notifies the transfer address received from the mail transfer service site 1 to the other party who exchanges mail (hereinafter referred to as a mail sending user). And send it using The mail sending user creates an e-mail addressed to the member user and sends it to the transfer address notified by the member user. This e-mail is delivered to the mail transfer service site 1, and the mail transfer service site 1 converts the data format of the received e-mail into a data format supported by the portable wireless terminal 5 of the member user. At this time, an advertisement is embedded in the e-mail.

Then, the mail address of the portable radio terminal 5 of the member user is obtained from the transfer address of the received e-mail, and a notification of the arrival of the mail is transmitted to the portable radio terminal 5 of the member user. FIG. 3A is an example of a mail incoming notification screen displayed on the portable wireless terminal 5 of the member user.

In the example of the incoming call notification screen shown in FIG. 1, an advertising portion 31 is provided in addition to the portion 32 for notifying the incoming mail. Displayed in the advertisement part 31 is an advertisement of an advertiser who has made a sponsor contract with the present system. The advertisement conditions of the advertiser from among a plurality of registered advertisements and the personal information of the member user who receives the mail are displayed. Is selected and displayed. The details on this point will be described later.

The part 32 for notifying the arrival of the mail includes a part 33 for notifying the sender of the mail in addition to the message for notifying the arrival of the mail. This part 33 is a hyperlink to a specific directory on the mail transfer service site 1, and when the member user operates a button or the like of the portable wireless terminal 5 and selects this part 33, the mail transfer service site 1 The converted mail data is read into the portable wireless terminal 5 from the directory provided with the link (3), and is displayed on the screen of the portable wireless terminal 5.

FIG. 3B shows an example of a screen displayed on the portable radio terminal 5 at this time. In the figure, similarly to the incoming call notification screen of FIG. 3A, an advertisement part 31 is provided in addition to the part 34 for displaying the contents of the mail, and the advertisement of the selected sponsor is posted.

As described above, in this system, a data conversion service is provided, mail is transferred, and a sponsor advertisement can be posted on the portable radio terminal 5. FIG. 4 is a configuration example of the mail transfer service site 1. The mail transfer service site 1 includes a Web server 10 that performs data conversion of received mail, a mail server 20 that receives mail and transmits an incoming notification, and a database server 30. These elements are
They may be configured on different information processing devices or on the same information processing device.

The Web server 10 stores the converted mail storage unit 1
1, an advertisement selection unit 12 and a mail format conversion unit 13. The converted mail storage unit 11 is a memory for storing mail after data conversion. The advertisement selecting unit 12 selects an advertisement to be added to the mail, reads out the personal information of the user member of the mail destination and the advertisement distribution conditions of each sponsor via the database server 30, compares them, and notifies the arrival notification. And select the ads to be posted on the email. The mail format conversion unit 13 converts the received mail and the advertisement information of the advertisement selected by the advertisement conversion unit 12 into a data format supported by the portable wireless terminal 5 of the transmission destination.

The mail server 20 includes a mail storage unit 21,
A mail transfer service unit 22, an incoming call notification unit 23, and a transfer mail storage unit 24 are provided. The mail storage unit 21 is a memory that stores mail received from the Internet 4. The mail transfer service unit 22 is responsible for the entire process of transferring the received e-mail to the member user. The incoming call notifying unit 23 notifies the arrival of the mail to the portable wireless terminal 5 of the member user who is the destination. The transfer mail storage unit 24 stores the data to be transferred and the converted data of the advertisement information to be added, and has a directory structure inside. In the incoming call notification, a hyperlink is provided to the directory in the forwarded mail storage unit 24. When the user operates the mobile wireless terminal 5 and selects a link, the data stored in the directory is stored in the mobile phone. It is transmitted to the wireless terminal 5.

The database server 30 manages various databases used by the mail transfer service site 1, and includes a member information database 31, an advertisement information database 32, and an advertisement distribution history information database 33.
Is provided. The member information database 31 is a database for managing information on member users who are registered as members on this site.

FIG. 5 is an example of a record configuration of the member information database 31. In the figure, a record is provided for each member user, and member ID, name, e-mail address, transfer destination domain name, terminal type, and personal information of the member user as prefectural, gender, age, occupation, hobby and advertisement posting. A flag indicating permission / inhibition is recorded. Among these pieces of information, the member ID and name are information for specifying each member user, and when searching for information for each member user, these pieces of information are used as search keys.

The mail address and transfer destination domain name are
This is used to determine the e-mail address of the transmission destination for sending the e-mail arrival notification. The e-mail address part stores the forwarding address issued to each member user, and the forwarding destination domain name part notifies the destination address. The domain name of the mail address of the portable wireless terminal 5 of the member user is stored. For example, if the received e-mail has a mail address of “yamada@xyz.ne.jp” as the destination, the incoming notification unit 23 searches the member information database 31 using this as a search key, and searches the corresponding record. "Abc.ne.jp" is obtained as the transfer destination domain name.
Then, the incoming call notification unit 23 replaces the domain name part of “yamada@xyz.ne.jp”, which was the destination of the e-mail, with “abc.ne.jp”.
", And the email address of the notification destination" yamada@abc.n
e.jp "and send an incoming notification to this email address.

The terminal type is data indicating the type of the telecommunications carrier to which the portable radio terminal 5 of the member user belongs, and is used to determine the data format for converting the received mail from this value. The mail format conversion unit 13 selects a format conversion program for performing data conversion using the terminal type and the format conversion program management table. FIG. 6 shows a data configuration example of the format conversion program management table.

In the table shown in the figure, the terminal type is associated with the format conversion program storage address indicating the storage location of the format conversion program for converting data.
The mail format conversion unit 13 uses the terminal type of the portable wireless terminal 5 to which the mail extracted from the member information database 31 is transferred as the storage address of the format conversion program, finds the storage location of the corresponding format conversion program, and The received mail and the advertisement data to be added are converted using a program. The format conversion program management table is
The configuration may be such that the file name of each format conversion program is stored in the format conversion program storage address portion instead of the address.

The prefecture, gender, age, occupation and hobby in FIG. 5 are personal information of the member user and are used when selecting advertisement information to be added to the electronic mail. By comparing these data with the advertisement distribution conditions of each advertisement recorded in the advertisement information database 32, a matching advertisement is selected and added to an e-mail or an incoming call notification. Advertisement is possible /
The flag indicating impossibility is a flag indicating whether the member user is allowed to place an advertisement in an e-mail,
If this flag indicates that the advertisement is not allowed, the advertisement is not inserted in the e-mail or the incoming call notification.

The advertisement information database 32 is a database for managing information on sponsored advertisers. FIG. 7 shows a record configuration example of the advertisement information database 32. In the advertisement information database 32, a record is configured for each advertiser. In the case of the figure, an advertisement ID and an advertiser name for specifying each advertiser, and a place where advertisement information of an advertisement to be posted is stored are shown. The prefecture, gender, age, occupation, and hobby are recorded as the provided advertisement file and the advertisement distribution conditions when selecting a partner for posting the advertisement. These advertisement distribution conditions are information for an advertiser to select a partner to be posted according to advertisement content or the like in order to increase advertising efficiency. Each item of this ad delivery condition part is
The condition is stored only in the portion necessary for the sorting, and the unnecessary items do not store data and are in the NULL state.
When selecting the advertisement to be added to the e-mail, the advertisement selection unit 12 selects an advertisement of the advertiser whose personal information of the member user who is the destination of the e-mail matches the advertisement distribution condition in the advertisement information database 32. select.

The advertisement distribution history information database 33 stores the advertisement selection unit 1 when selecting a posted advertisement, and when there are a plurality of advertisements whose personal information of the member user matches the advertisement distribution conditions.
Reference numeral 2 indicates which advertisement has been posted to each member user and how many times. FIG. 8 shows a record configuration example of the advertisement distribution history information database 33.

In the figure, the record of the advertisement distribution history information database 33 is configured for each member user, and the member ID of each member, the advertisement ID of one or a plurality of advertisements posted for the member user, and each advertisement Is recorded. Among them, the advertisement ID identifies the advertisement posted on the portable wireless terminal 5 of the member user, and the number of distributions indicates the number of times the advertisement has been distributed. When there are a plurality of advertisement candidates to be posted, the advertisement selecting unit 12 refers to the advertisement distribution history information database 33 and selects an advertisement that has been distributed the least to the member user. In this way, the advertisement distributed for each member user and the number of advertisements are recorded, and the advertisement selected by the advertisement selection unit 12 is selected with the least number of distributions. Since various kinds of advertisements are distributed without being limited to the above advertisement, efficient advertisement insertion can be performed. The record of the advertisement distribution history information database 33 has a configuration for managing the number of distributions for each advertiser in addition to the configuration of FIG.
2 may be configured to use both the number of distributions for each member user and the number of distributions for each advertiser in FIG. 8 to select an advertisement to be posted.

FIG. 9 is a flowchart showing the processing performed by the mail transfer service unit 22. When the mail transfer service site 1 receives the e-mail (step S1),
The mail transfer service unit 22 analyzes the header of the received e-mail (step S2), and checks the data format of the e-mail, the source and destination e-mail addresses, and the like.

Next, in step S3, the member information database 3 is set using the destination mail address as a key.
1 is searched. If the corresponding mail address is not registered in the member database (step S4,
No), the received mail cannot be transferred, so that in step S11, the sender of the mail is notified by e-mail that the mail cannot be transferred, and the process ends. As a result of the search in step S3, if there is corresponding member information, it is received from the database 20 (step S3).
4, Yes).

Next, in step S5, the data format of the received e-mail is determined. As a result, if the received mail is plain text data (step S5, Ye
s) In step S10, the mail address of the transmission destination of the received mail is changed, and the mail is transmitted to the portable wireless terminal 5 of the destination member user. At this time, if the number of characters of the received mail exceeds the number of characters supported by the portable wireless terminal 5 of the transfer destination, the mail is divided into a plurality of mails and transmitted.

If the received mail is in a format other than plain text, such as an HTML message or another markup language (step S5, No), the mail format conversion unit 13 transfers the received mail to the portable radio as a transfer destination in step S6. The data is converted into a data format supported by the terminal 5, and step S
In step 7, the converted mail data in the converted mail storage unit 11 is stored in the transfer mail storage unit 24.

Then, as step S8, the advertisement selecting unit 1
After the process of selecting the advertisement placement to be added to the mail and the process of attaching the advertisement information to the mail are performed in step 2, the incoming notification unit 23 stores the transferred mail in the transferred mail storage unit 24 into the directory where the transferred mail is stored in step S9. After transmitting the incoming call notification incorporating the hyperlink to the portable wireless terminal 5 of the transfer destination, the process ends.

FIG. 10 is a flowchart showing the processing performed by the mail format converter 13. The processing shown in the figure is performed in step S6 in FIG. 9 and step S37 in FIG.
This is a process performed by the mail format conversion unit 13 being called by the mail transfer service unit 22 and the advertisement selection unit 11.

When the mail format conversion unit 13 is called by the mail transfer service unit 22 or the advertisement selection unit 11, first, at step S21, the mail format conversion unit 13 converts the terminal type notified from the mail transfer service unit 22 or the advertisement selection unit 11 into a diagram. The corresponding format conversion program is called using the format conversion program management table shown in FIG.

Next, as step S22, the data of the received mail and the advertisement information passed from the mail transfer service unit 22 or the advertisement selecting unit 11 are passed to the format conversion program, and the portable radio terminal 5 of the transfer destination responds. To the data format you are using.

Then, as step S23, the converted data is stored in the converted mail storage unit 11, and the process is terminated. FIG. 11 is a flowchart illustrating a process performed by the advertisement selecting unit 11. The processing shown in FIG.
8 and a later-described step S41 in FIG.
1 is a process performed by being called by the mail transfer service unit 22 or the incoming call notification unit 23.

At step S31, the advertisement selecting unit 11 first checks a flag indicating whether or not to permit advertisement posting of the personal information of the transfer destination member user, and if the flag indicates that the advertisement cannot be posted, Since advertisement distribution is not possible (step S31, No), the process ends because there is no need to select an advertisement to be added to a mail or an incoming call notification.

At step S31, if the flag indicates that the advertisement can be placed, and the advertisement can be distributed (step S3).
1, Yes), as step S32 in FIG.
The personal information acquired in 3 and S4 is compared with the advertisement distribution conditions of each advertiser in the advertisement information database 32, and matching advertisement information is extracted. As a result, if there is no matching advertisement information (step S33, No), the process is terminated.

If there is advertisement information that matches in step S33 (step S33, Yes), and if the number is only one (step S34, No), step S35 is skipped and the advertisement information is selected as an advertisement to be posted. Then, if the matching advertisement information is two or more (step S34,
Yes), the advertisement distribution history information database 33 is referred to as step S35, and the advertisement information with the least number of distributions to the transfer destination member user is selected from the plurality of pieces of advertisement information.

Then, in step S36, the number of distributions of the selected advertisement information in the advertisement distribution history information database 33 is updated by incrementing by +1. Next, at step S37, the mail format conversion unit 13 converts the selected advertisement information into a data format supported by the transfer destination portable wireless terminal 5, and at step S38, the converted mail storage unit 11
After storing the converted advertisement information in the transfer mail storage unit 24, the post-processing is ended. The advertisement is added to the electronic mail by the process of storing the converted advertisement data in the transfer mail storage unit 24 in step S38.

FIG. 12 is a flowchart showing the processing performed by the incoming call notification unit 23. The process in FIG. 14 corresponds to the process performed by the incoming notification unit 23 being called by the mail transfer service unit 22 in step S9 in FIG. When called by the mail transfer service unit 22, the incoming call notification unit 23
First, as step S41, the advertisement selecting unit 12 is called,
Select advertisement information to be posted on the incoming call notification.

Next, as step S42, the incoming call notifying section 23 obtains the directory name in the transfer mail storing section 24 in which the converted received mail data is stored. Then, in step S43, the advertisement information selected in step S41 is posted, and data of an incoming call notification in which a hyperlink is provided to the directory acquired in step S42 is created. This is transmitted as a mail arrival notification to the portable wireless terminal 5 to which the mail is transferred (step S4).
4), end the process.

FIG. 13 is a diagram showing a system environment of a server constituting the mail transfer service site 1 when the above-described mail transfer system in the present embodiment is realized by a computer program. As shown in FIG. 13, each server has a CPU 41, a main storage device 42 including a ROM and a RAM, an auxiliary storage device 43, a display,
Input / output device (I / O) 44 such as keyboard, LAN or W
An AN, a network connection device 45 such as a modem for making a network connection with another node through a general line, and a medium reading device 46 for reading stored contents from a portable recording medium 47 such as a disk or a magnetic tape. Is provided. In this configuration, the functions of the mail transfer service site 1 are such that a control program is loaded on the main storage
41 is executed by executing.

In the information processing system shown in FIG. 13, a medium reading device 46 reads out a program and data stored in a recording medium 47 such as a magnetic tape, a floppy (registered trademark) disk, a CD-ROM, and an MO, and reads this. It is downloaded to the main storage device 42 or the auxiliary storage device 43. Each process according to the present embodiment can be realized by software by the CPU 41 executing this program or data.

In this node, application software may be exchanged using a recording medium 47 such as a floppy disk. Therefore, the present invention is not limited to the mail transfer system, and may be configured as a computer-readable recording medium 47 for causing a computer to perform the functions of the above-described embodiments of the present invention when used by the computer. it can.

In this case, the “recording medium” includes, for example, FIG.
As shown in FIG. 4, a removable recording medium 56 such as a CD-ROM, a floppy disk (or an MO, a DVD, a removable hard disk, etc.) detachable from a medium drive device 57 or a network line 53 The storage means (database or the like) 52 in an external device (server or the like) to be transmitted or the main body 54 of the information processing device 51
(Such as a RAM or a hard disk) 55 and the like. The programs stored in the portable recording medium 56 and the storage means (database or the like) 52 are loaded into a memory (RAM or hard disk or the like) 55 in the main body 54 and executed.

[0049]

According to the present invention, an e-mail in a format other than plain text can be transferred to a portable radio terminal having a data format different from that of the transmission source. In addition, an advertisement of an advertiser can be posted on an incoming call notification notified to a portable wireless terminal of a transmission destination or on an e-mail.

Further, by managing the number of times each advertisement is posted to each transmission destination, it is possible to prevent the same advertisement from being posted many times, and it is possible to realize efficient advertisement posting.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a system configuration according to an embodiment.

FIG. 2 is a mail transfer service site according to the present system,
It is a figure showing exchange with a mail transmitting side and a mail receiving side.

FIGS. 3A and 3B are diagrams illustrating a display example on a portable wireless terminal of a member user, wherein FIG. 3A is a diagram illustrating an example of a mail arrival notification screen, and FIG.

FIG. 4 is a diagram showing a configuration example of a mail transfer service site.

FIG. 5 is a diagram illustrating a record configuration example of a member information database.

FIG. 6 is a diagram illustrating a data configuration example of a format conversion program management table.

FIG. 7 is a diagram showing a record configuration example of an advertisement information database.

FIG. 8 is a diagram illustrating a record configuration example of an advertisement distribution history management database.

FIG. 9 is a flowchart illustrating a process performed by a mail transfer service unit.

FIG. 10 is a flowchart illustrating a process performed by a mail format conversion unit.

FIG. 11 is a flowchart illustrating a process performed by an advertisement selecting unit.

FIG. 12 is a flowchart illustrating a process performed by an incoming call notification unit.

FIG. 13 is a system environment diagram of a server constituting the mail transfer service site 1.

FIG. 14 is a diagram illustrating an example of a storage medium.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mail transfer service site 2 Internet 3 Portable wireless terminal server 4 Internet connection server 5 Portable wireless terminal 6 Information terminal 10 Web server 11 Converted mail storage unit 12 Advertisement selection unit 13 Mail format conversion unit 20 Mail reception unit 21 Mail storage unit 22 Mail Forwarding service unit 23 Incoming call notification unit 24 Forwarded mail storage unit 30 Database server 31 Member information database 32 Advertising information database 33 Advertising distribution history information database

Claims (8)

[Claims] 1. A mail transfer system for providing an electronic mail transfer service to a portable wireless terminal, a mail format converting means for converting a received electronic mail into a format supported by the transfer destination portable wireless terminal, A mail transfer system, comprising: an incoming call notifying unit that sends an incoming call notification for the received electronic mail to the transfer destination portable terminal. 2. The apparatus according to claim 1, further comprising a transfer mail storage unit for storing the electronic mail converted by the mail format conversion unit, wherein the incoming notification unit indicates a storage position of the converted electronic mail in the transfer mail storage unit. The mail transfer system according to claim 1, wherein the arrival notification including information is transmitted. 3. The mail transfer system according to claim 2, wherein the incoming notification unit transmits the new arrival notification including a hyperlink to the storage location. 4. The system according to claim 1, further comprising an advertisement publishing unit that publishes advertisement information in at least one of the converted electronic mail and the incoming call notification.
The mail transfer system according to any of the above. 5. Advertisement information storage means for storing a plurality of pieces of advertisement information, publication condition storage means for storing publication conditions for the advertisement, and the advertisement whose publication conditions match the user of the transfer destination portable radio terminal. 5. The mail transfer system according to claim 4, further comprising: an advertisement selection unit that selects information, wherein the advertisement posting unit posts the advertisement information selected by the advertisement selection unit. 6. 6. An advertisement distribution history information recording means for recording the number of times each advertisement information is posted, wherein said advertisement selection means,
6. The mail transfer system according to claim 5, wherein, when there are a plurality of pieces of advertisement information whose publication conditions match the user, the advertisement information with the least number of publications is selected. 7. The incoming call notifying means, wherein the destination is a mail address obtained by changing a domain name of a mail address added as a destination to the received electronic mail to a domain name corresponding to the transfer destination portable wireless terminal. 7. The mail transfer system according to claim 1, wherein an incoming call notification is transmitted. 8. A computer-readable recording medium storing a control program for causing a computer to execute control of transferring an e-mail by causing the computer to execute the transfer of the e-mail. A storage medium storing a control program that causes the computer to convert the format into a format supported by the wireless terminal and to transmit an incoming notification for the received electronic mail to the mobile terminal of the transfer destination.