JP2006261991A - Mail server and mail server program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mail server and a mail server program that can be surely confirmed without losing e-mail information on the receiver side even when an e-mail having a large data size is transmitted.
[Solution]
A correspondence table between the transmission destination address of the electronic mail, the maximum size of the electronic mail permitted to be transmitted to the transmission destination address, and the forwarding address of the electronic mail is stored. If the size of the received email is less than the maximum size in the correspondence table, send the received email to the destination address of the received email, and if the size of the received email exceeds the maximum size , Forward to the forwarding address in the correspondence table.
[Selection] Figure 7

Description

  The present invention relates to a mail server that mediates transmission / reception of electronic mail, and a mail server program that is executed in a computer to operate the computer as a mail server that mediates transmission / reception of electronic mail.

  With the spread of personal computers and significant improvements in communication technology, electronic mail has been widely used as a general information transmission means. In recent years, there are various uses for e-mails, not just to convey requirements, such as music files and image files attached to e-mails, and images that are pasted and decorated in the body of e-mails. It is becoming.

  In general, a small portable device such as a mobile phone is also equipped with a function of transmitting and receiving e-mails. According to such a portable device, you can send and receive e-mail immediately on the go, and even if you do not have a personal computer, you can exchange e-mail with the portable device you use everyday Because of this, many people who use mobile devices use the email function.

  However, as described above, in recent years, various files have been attached to e-mails and the body of e-mails has become elaborate, and the data size of e-mails has increased. For this reason, in a small portable device or the like in which it is difficult to provide a large-capacity storage device, the data size of the transmitted e-mail may exceed the data size that can be received at one time by the portable device. In such a case, the mail server in the base station that mediates the sending and receiving of e-mails deletes part of the mail text and attached files, and sends e-mails with a data size that satisfies the capacity limit to small portable devices. There is a problem that some information is lost.

With regard to this problem, Patent Document 1 discloses that a mail server converts a file attached to an e-mail into a data format that can be viewed from a browser, stores the data in a Web server, and sends the e-mail to an e-mail recipient. Is described, and a technique for transmitting a URL indicating the storage location of the attached file is described. According to the technique disclosed in Patent Document 1, an e-mail recipient can confirm an attached file by accessing a transmitted URL, and a large-capacity attached file is sent to a small portable device. Even so, it is possible to obtain without losing information of the attached file.
JP 2002-91882 A

  However, in the technique described in Patent Document 1, when the data size of the mail text itself is large, a part of the mail text is deleted, and eventually a part of the information is lost. In addition, for example, when an attached file is viewed on a personal computer shared among an unspecified number of people, the attached file is illegally accessed by a person who uses the personal computer later. , Information on attached files may be leaked.

  Furthermore, the base station that mediates transmission / reception of e-mails must also have a large-capacity Web server that can store all attached files transmitted to a large number of users, which entails enormous costs. There is a problem of end.

  SUMMARY OF THE INVENTION In view of the above circumstances, the present invention provides a mail server and a mail server program that can reliably check e-mail information without losing e-mail information even when an e-mail having a large data size is transmitted. The purpose is to provide.

The mail server of the present invention that achieves the above object provides:
In a mail server that mediates the sending and receiving of emails,
A correspondence table storage unit that stores a correspondence table of a destination address of the email, a maximum size of the email allowed to be transmitted toward the destination address, and a forwarding address of the email;
A mail receiving unit that receives an email sent to a predetermined destination address;
When the size of the received e-mail received by the mail receiver is less than or equal to the maximum size recorded in the correspondence table in association with the destination address that matches the destination address of the received e-mail The received e-mail is transmitted to the destination address of the received e-mail, and when the size of the received e-mail exceeds the maximum size, the received e-mail is transmitted to the destination address of the received e-mail. Instead, there is provided a mail transmission unit that transfers the received electronic mail to the transfer destination address associated with the transmission destination address and recorded in the correspondence table.

  According to the mail server of the present invention, the correspondence table of the transmission destination address of the electronic mail, the maximum size permitted to be transmitted to the transmission destination address, and the forwarding address of the electronic mail is stored in advance. When an electronic mail having a size exceeding the maximum size in the transmission destination address is transmitted to the transmission destination address, the electronic mail is transferred to the transfer destination address associated with the transmission destination address. For example, by recording the mail address of a personal computer equipped with a large-capacity storage device as the forwarding address, even if an email with a large data size is sent to a mobile phone, etc. Can be obtained without losing information.

Further, in the mail server of the present invention, an edit information receiving unit that receives edit information for editing the correspondence table stored in the correspondence table storage unit,
It is preferable to include a correspondence table editing unit that edits the correspondence table based on the editing information received by the editing information receiving unit.

  According to the mail server of a preferred aspect of the present invention, the transfer destination address can be changed even after the correspondence table is created.

Further, in the mail server according to a preferred aspect of the present invention, the mail server includes an authentication unit that authenticates the source of the editing information,
More preferably, the correspondence table editing unit edits the same destination address column as the source address in the correspondence table based on the editing information transmitted from the authenticated source.

  By reflecting only the editing information sent from the authenticated sender on the correspondence table, avoiding the problem of e-mail information leaking due to unauthorized changes to the forwarding address in the correspondence table. be able to.

  Further, in the mail server of the present invention, when the received mail is transferred toward the transfer destination address recorded in the correspondence table, the mail transmission unit sends a predetermined message toward the destination address of the received e-mail. Is preferably transmitted.

  By transmitting the message to the destination address, the user can recognize that the electronic mail has been transferred.

In the mail server of the present invention, the correspondence table stored in the correspondence table storage unit includes an email sent to the destination address in addition to the destination address, maximum size, and transfer destination address. When it is transferred to the transfer destination address recorded in association with the transmission destination address, the notification content to be notified to the transmission destination address is recorded in association with the transmission destination address.
When the received e-mail is transferred toward the transfer destination address recorded in the correspondence table, the mail transmission unit stores the received e-mail in the correspondence table in association with the destination address toward the transmission destination address of the received e-mail. It is preferable to transmit a message in accordance with the notified notification content.

  When the e-mail is transferred, the notification content to be notified to the destination address is recorded in the correspondence table in advance, so that the body of the e-mail is sent to the destination address as well. You can be notified of mail transfer.

Further, the mail server program of the present invention that achieves the above-described object is
In a mail server program executed in a computer system and mediating transmission / reception of electronic mail to the computer system,
On the computer system,
A correspondence table storage unit that stores a correspondence table of a destination address of the email, a maximum size of the email that is allowed to be transmitted to the destination address, and a forwarding address of the email;
A mail receiving unit that receives an email sent to a predetermined destination address;
The maximum size stored in the correspondence table in which the size of the received email received by the mail receiving unit is associated with the destination address that matches the destination address of the received email in the correspondence table In the following cases, the received e-mail is transmitted to the destination address of the received e-mail, and when the size of the received e-mail exceeds the maximum size, the received e-mail is Instead of sending to a destination address, a mail sending unit is configured to forward the received e-mail toward the forwarding address associated with the destination address and stored in the correspondence table. It is characterized by that.

  According to the mail server program of the present invention, even when an electronic mail having a large data size is transmitted, the computer can function as a mail server that can reliably acquire the electronic mail on the receiver side.

  Note that the constituent elements such as the correspondence table storage unit constructed by the mail server program of the present invention may be constructed by one program part, and one constituent element may be a plurality of programs. It may be constructed by parts, or a plurality of components may be constructed by one program part. In addition, these components may execute such actions themselves, or may be executed by giving instructions to other programs and program components incorporated in the computer. Also good.

  Further, the mail server program of the present invention is shown only in its basic form here, but this is merely for avoiding duplication, and the mail server program referred to in the present invention includes only the above basic form. Instead, various forms corresponding to the above-described forms of the mail server are included.

  As described above, according to the present invention, even when an e-mail having a large data size is transmitted, a mail server that can surely confirm without losing e-mail information on the receiver side, and A mail server program can be provided.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic diagram illustrating an example of a communication system to which an embodiment of the present invention is applied.

  FIG. 1 shows a mobile phone 10 having an e-mail function, a personal computer 30 (hereinafter abbreviated as a personal computer), a base station 20 in which wireless communication is performed between the mobile phone 10, and the mobile phone 10. 2 shows a mail server 200 that mediates an electronic mail transmitted in this manner, a base station 20, a personal computer 20, and an Internet network 21 that connects the mail server 200 to each other. Actually, a large number of mobile phones are connected to the base station 20, and a mail server for a personal computer that mediates a large number of base stations, a large number of personal computers, and an electronic mail transmitted to the personal computer. Are connected to the Internet network 21, but only those necessary for the description of the present invention are shown in FIG.

  In the present embodiment, the e-mail transmitted to the mobile phone 10 is once received by the mail server 200 and stored in the mail server 200. When a mail reception request is transmitted from the mobile phone 10 to the mail server 200, the received e-mail stored in the mail server 200 is sent to the mobile phone 10 and received by the mobile phone 10. Here, since the cellular phone 10 is small in size, a large-capacity storage device cannot be provided, and an email in which the data size of the transmitted email can be received at once by the cellular phone 10 May exceed the maximum size. The mail server 200 is equipped with a transfer function for transferring an electronic mail to a predetermined transfer destination address when a large-capacity electronic mail is sent to the mobile phone 10. This transfer function will be described in detail later.

  FIG. 2 is an external perspective view of the mail server, and FIG. 3 is a hardware configuration diagram of the mail server.

  The mail server 200 has an appearance configuration, a main body device 201, an image display device 202 that displays an image on a display screen 202a according to an instruction from the main body device 201, and various information according to key operations on the main body device 201. And a mouse 204 for inputting an instruction corresponding to, for example, an icon or the like displayed at that position by designating an arbitrary position on the display screen 202a. The main body apparatus 201 has an MO loading port 201a for loading MO and a CD / DVD loading port 201b for loading a CD-ROM or DVD in appearance.

  In the main unit 201, as shown in FIG. 3, a CPU 211 that executes various programs, a RAM 212 that is read out from a program stored in the hard disk device 213 and developed for execution by the CPU 211, and various programs and data Are stored, a hard disk controller 213 for controlling access to the hard disk device 221, an MO 222, an MO drive 214 for accessing the MO 222 loaded, a CD-ROM 223, and a CD / DVD for accessing a DVD Drive 215, display controller 218, keyboard controller 217, and mouse controller 216 for controlling image display device 202, keyboard 203, and mouse 204, respectively, also shown in FIG. A communication board 219 for transmitting and receiving various data to and from the base station 20 and the personal computer 30 is connected to the Internet network 21 and the like, and these various elements are connected to each other via a bus 210. ing.

  FIG. 4 shows functional blocks necessary for realizing a function (transfer function) unique to the present embodiment, which is configured by combining hardware of the mail server 200 and a program executed by the CPU 211 of the mail server 200. FIG.

  FIG. 4 shows an e-mail receiving unit 310, an authentication unit 320, a notification unit 330, a database control unit 340, an e-mail transmission unit 350, a mail server control unit 360, a correspondence table database 410, and an e-mail storage unit 420. ing.

  First, the correspondence table database 410 will be described.

  The correspondence table database 410 has the role of the hard disk device 221 shown in FIG. 3, and the mail address of the mobile phone included in the communication system shown in FIG. 1 and the emails that can be received by the mobile phone. A correspondence table 411 associated with the maximum size is stored. The database control unit 340 accesses the correspondence table database 410 and updates the correspondence table 411. In the present embodiment, only the database control unit 340 accesses the correspondence table database 410, so that the consistency of the correspondence table 411 is maintained. The correspondence table database 410 is an example of the correspondence table storage unit referred to in the present invention, and the database control unit 340 corresponds to an example of the correspondence table editing unit referred to in the present invention.

  FIG. 5 is a diagram illustrating an example of the correspondence table 411 stored in the correspondence table database 410.

  As shown in FIG. 5, the correspondence table 411 includes a mobile phone mail address (hereinafter referred to as a registered address) included in the communication system shown in FIG. In the following, it is referred to as a registered maximum size), a forwarding mail address (hereinafter referred to as a registered forwarding address) for transferring an email having a data size exceeding the maximum size, and a notification that the email has been forwarded to the mobile phone. And a password necessary for updating the correspondence table 411 (hereinafter referred to as a registration password) are recorded. This correspondence table 411 is an example of the correspondence table referred to in the present invention.

  Returning to FIG.

  The mail server control unit 360 shown in FIG. 4 controls various elements shown in FIG. Various information other than electronic mail is transmitted and received by the mail server control unit 360 to the mobile phone 10 and the personal computer 30 shown in FIG. Also, various types of information are transmitted between the various elements shown in FIG. 4 via the mail server control unit 360. However, for the sake of simplicity of explanation, the flow of information between the various types of elements shown in FIG. A description will be given omitting 360. The mail server control unit 360 corresponds to an example of the editing information receiving unit referred to in the present invention.

  The e-mail receiving unit 310 receives an e-mail transmitted to a mail address of a mobile phone included in the communication system shown in FIG. The e-mail receiving unit 310 corresponds to an example of a mail receiving unit according to the present invention. The received e-mail is transmitted to the e-mail transmission unit 350.

  The correspondence table 411 stored in the correspondence table database 410 can be edited by a mobile phone included in the communication system shown in FIG. At the time of editing, an edit request and a password (hereinafter referred to as a transmission password) are transmitted from the mobile phone to the mail server 200, and the information is received by the mail server control unit 360. The authentication unit 320 acquires a transmission password or the like from the mail server control unit 360, and determines whether or not the transmission password matches the registered password recorded in the correspondence table 411. The determination result is transmitted to the mail server control unit 360, and a determination result response is transmitted to the mobile phone via the base station 20 shown in FIG. The authentication unit 320 corresponds to an example of the authentication unit according to the present invention.

  When a password match response (edit permission) is received, the contents for updating the correspondence table 411 are edited in the mobile phone, and edit information representing the edit contents is transmitted to the mail server 200. The editing information transmitted from the mobile phone is received by the mail server control unit 360. The received editing information is transmitted to the database control unit 340, and the correspondence table 411 stored in the correspondence table database 410 is updated.

  If the data size of the email received by the email receiver 310 exceeds the maximum registered size recorded in the correspondence table 411, the email transmission unit 350 records the email in the correspondence table 411. If the e-mail data size is equal to or smaller than the registered maximum size, the e-mail is stored in the e-mail storage unit 420. In addition, when the e-mail transmission unit 350 receives a mail reception request from a mobile phone, the e-mail transmission unit 350 transmits the e-mail stored in the e-mail storage unit 420 to the mobile phone. The e-mail transmission unit 350 corresponds to an example of the e-mail transmission unit referred to in the present invention.

  The notification unit 330 creates a notification mail according to the registration notification method recorded in the correspondence table 411 when the electronic mail transmission unit 350 transfers the electronic mail to the transfer destination mail address. The created notification mail is sent to the e-mail transmission unit 350 and transmitted to the mobile phone. This notification unit 330 corresponds to an example of a notification unit according to the present invention.

  The mail server 200 is basically configured as described above.

  Hereinafter, various processes executed in the mail server 200 will be described in detail.

  First, processing for creating / updating the correspondence table 411 stored in the correspondence table database 410 will be described.

  FIG. 6 is a flowchart showing the flow of processing for editing the correspondence table 411.

  In the present embodiment, the mobile phone included in the communication system shown in FIG. 1 is added to the reference mode for referring to the column corresponding to the mail address of the mobile phone in the correspondence table 411 shown in FIG. Registration mode for registering mobile phone information, correction mode for correcting the column corresponding to the mail address of the own mobile phone in the correspondence table 411, and deletion for deleting the column corresponding to the mail address of the own mobile phone in the correspondence table 411 A menu screen capable of selecting one of the editing modes is prepared in advance. When the user of the mobile phone selects one editing mode using the menu screen, information on the selected editing mode is transmitted to the mail server 200.

  The editing mode information transmitted from the mobile phone is received by the mail server control unit 360 shown in FIG. 4 via the base station 20 shown in FIG. 1 (step S101 in FIG. 6). The mail server control unit 360 acquires the mail address of the mobile phone that has transmitted the edit mode (hereinafter, this mail address is referred to as a request mail address), and transmits the edit mode information and the request mail address to the authentication unit 320. .

  When the transmitted edit mode is the registration mode (step S102 in FIG. 6: Yes), the authentication unit 320 transmits the request mail address to the database control unit 340.

  The database control unit 340 accesses the correspondence table database 410 and searches for a registered email address recorded in the correspondence table 411 that matches the request email address transmitted from the authentication unit 320 (FIG. 6). Step S103). When there is a registered email address that matches the requested email address (step S104 in FIG. 6: Yes), the database control unit 340 notifies the authentication unit 320 of the search result “registered”. The authentication unit 320 transmits the “registered” message to the mail server control unit 360, and the mail server control unit 360 transmits the “registered” message to the mobile phone via the base station 20 shown in FIG. When there is no registered mail address that matches the request mail address (step S104 in FIG. 6: No), the database control unit 340 notifies the authentication unit 320 of the search result “unregistered”. The authentication unit 320 transmits a “registration permission response” message to the mail server control unit 360, and the mail server control unit 360 transmits a “registration permission response” message to the mobile phone (step S105 in FIG. 6).

  When the user of the mobile phone confirms the “registration permission response” message sent from the mail server 200, the maximum size and the forwarding mail address as shown in FIG. 5 are displayed according to the editing screen prepared in advance. Set notification method and password. The set editing content is transmitted to the mail server 200 as editing information.

  The editing information sent from the mobile phone is received by the mail server control unit 360 in FIG. 4 (step S106 in FIG. 6). The mail server control unit 360 acquires the mail address (request mail address) of the mobile phone and transmits the request mail address and the received editing information to the database control unit 340.

  The database control unit 340 accesses the correspondence table database 410, records the request mail address and editing information transmitted from the mail server control unit 360 in the correspondence table 411, and updates the correspondence table 411 (step of FIG. 6). S107). Further, the database control unit 340 notifies the mail server control unit 360 of registration information representing the registration content added to the correspondence table 411. The mail server control unit 360 transmits the registration information transmitted from the database control unit 340 to the mobile phone (step S108 in FIG. 6).

  The user of the mobile phone confirms that the information on the mobile phone is registered in the correspondence table 411 based on the registration information sent from the mail server 200.

  In step S102 in FIG. 6, when the received edit mode is a mode other than the registration mode (reference mode, correction mode, and delete mode) (step S102: No in FIG. 6), the authentication unit 320 The mail server control unit 360 is notified of a “password input request” message, and the mail server control unit 360 transmits a “password input request” message to the mobile phone (step S109 in FIG. 6).

  The user of the mobile phone inputs a password according to a password input screen prepared in advance. The input password is transmitted to the mail server 200.

  The transmission password sent from the mobile phone is received by the mail server control unit 360 in FIG. 4 and is transmitted to the authentication unit 320 (step S110 in FIG. 6). The authentication unit 320 informs the database control unit 340 of the mail address (request mail address) of the mobile phone.

  The database control unit 340 accesses the correspondence table database 410 and searches for a registered email address recorded in the correspondence table 411 that matches the request email address transmitted from the authentication unit 320. Further, the registered contents recorded in the retrieved registered mail address column are acquired, and the registered contents are transmitted to the authentication unit 320.

  The authentication unit 320 determines whether or not the registration password in the registration content transmitted from the database control unit 340 matches the transmission password transmitted from the mobile phone. If the passwords do not match (step S111: No in FIG. 6), the authentication unit 320 transmits a “non-permission response” message to the mail server control unit 360, and the mail server control unit 360 transmits the antenna 22 in FIG. Then, a “non-permission response” message is transmitted to the mobile phone (step S117 in FIG. 6). When the passwords match (step S111 in FIG. 6: Yes), the authentication unit 320 transmits the registered content to the mail server control unit 360, and the mail server control unit 360 transmits the registered content to the mobile phone (FIG. 6). 6 step S112).

  As described above, when the correspondence table 411 is updated, by performing authentication with a password, it is possible to avoid a problem that the correspondence table 411 is illegally changed and the information of the e-mail is leaked.

  The user of the mobile phone can check the contents currently registered in the correspondence table 411 based on the registration contents sent from the mail server 200 (refer to the registration contents).

  When the registered content is further corrected after confirming the registered content currently registered (step S113 in FIG. 6: No), the user corrects the registered content according to a correction / deletion screen prepared in advance. When deletion is selected, a predetermined deletion flag is set in the registered contents. The corrected registration content is transmitted to the mail server 200 as editing information.

  The editing information sent from the mobile phone is received by the mail server control unit 360 in FIG. 4 (step S114 in FIG. 6), as in step S106, and the transmission mail address and the editing content are transmitted to the database control unit 340. .

  In the database control unit 340, similarly to step S107, the transmitted transmission mail address and the editing information are reflected in the correspondence table 411, and the correspondence table 411 is updated (step S115 in FIG. 6). In the case of deletion, the deletion flag set in the editing content is acquired, and the column in the correspondence table 411 where the transmission mail address matches the registered mail address is deleted. Further, the updated new registration information (or information indicating that the information has been deleted) is transmitted from the database control unit 340 to the mail server control unit 360, and the registered contents (or deletion notification) is transmitted from the mail server control unit 360 to the mobile phone. ) Is transmitted (step S116 in FIG. 6).

  The correspondence table 411 is created by the procedure as described above.

  Next, a process for transmitting / forwarding an e-mail sent to a mobile phone will be described.

  FIG. 7 is a flowchart showing a flow of processing for transmitting / forwarding an e-mail sent to a mobile phone.

  The e-mail transmitted to the e-mail address of the mobile phone included in the communication system shown in FIG. 1 is once received by the e-mail receiving unit 310 shown in FIG. 4 (step S201 in FIG. 7). The received e-mail is transmitted to the e-mail transmission unit 350.

  In the e-mail transmission unit 350, first, the transmission destination address of the transmitted e-mail is acquired, and the transmission destination address is transmitted to the database control unit 340.

  The database control unit 340 accesses the correspondence table database 410 and searches for registered email addresses recorded in the correspondence table 411 that match the transmission destination address transmitted from the email receiving unit 350. Further, the registered contents in the searched registered mail address column are acquired, and the registered contents are transmitted to the e-mail transmission unit 350.

  Subsequently, the e-mail transmission unit 350 acquires the data size of the received e-mail, and determines whether or not the acquired data size is larger than the maximum registration size in the registration contents transmitted from the database control unit 340. To do. When the data size of the e-mail is larger than the maximum registration size (step S202 in FIG. 7: Yes), the e-mail transmission unit 350 transfers the e-mail to the registered transfer destination address in the registration contents (in FIG. 7). Step S203). Furthermore, the e-mail transmission unit 350 notifies the notification unit 330 of the transmission destination address of the mobile phone, the notification method in the registered content, and the e-mail.

  In the notification unit 330, a message mail corresponding to the notification method is created for the destination address (step S204 in FIG. 7). For example, when the notification method is “Forwarding email address”, a message email with “Forwarding email address” is created, and when the notification method is “Forwarding email address” and “Email text” Creates a message mail in which “forwarding mail address” and “mail text” are described. In addition, when the notification method is “no notification”, the message mail is not created. The message mail created by the notification unit 330 is transmitted to the e-mail transmission unit 350.

  The e-mail transmission unit 350 stores the message e-mail created by the notification unit 330 in the e-mail storage unit 420 (step S205 in FIG. 7).

  In step S202, when the data size of the e-mail is equal to or smaller than the registered maximum size (step S202 in FIG. 7: No), the e-mail transmission unit 350 stores the e-mail in the e-mail storage unit 420 (in FIG. 7). Step S208).

  When the user of the mobile phone wants to check the received mail addressed to the mobile phone, the user presses a reception button (not shown) provided on the mobile phone. When the reception button is pressed, a reception request is sent to the mail server 200 via the base station 20 of FIG.

  The reception request sent from the mobile phone is received by the mail server control unit 360 (step S206 in FIG. 7). The mail server control unit 360 notifies the e-mail transmission unit 350 of the e-mail address (request e-mail address) of the mobile phone that has transmitted the reception request.

  When the e-mail transmission unit 350 obtains the request mail address from the mail server control unit 360, the e-mail addressed to the obtained request e-mail address among the e-mails stored in the e-mail storage unit 420 is directed to the mobile phone. Transmit (step S207 in FIG. 7).

  Thus, according to the mail server 200 of the present embodiment, when an e-mail having a data size larger than the registered maximum size is sent, the e-mail is transferred to a predetermined transfer destination mail address. For example, by specifying a mail address of a personal computer equipped with a large-capacity memory as a transfer destination mail address, it is possible to obtain information without losing e-mail information.

  Here, in the above description, an example in which only the column in which the information of the own device is recorded in the correspondence table has been described, but the authentication unit according to the present invention accepts input of an email address and a password, If they match the destination address and password recorded in the correspondence table, another device that is not the device having the destination address may authenticate the change of the correspondence table.

  In the above, the electronic mail transmitted to the e-mail address of the mobile phone is temporarily stored in the e-mail storage unit, and the electronic mail is transmitted to the mobile phone in response to the reception request from the mobile phone. Although an example of the mail transmitting unit has been described, the e-mail transmitting unit referred to in the present invention may be a unit that immediately transmits an e-mail to a mobile phone without storing it.

  Further, in the above description, the example in which the mail server of the present invention is applied to a mail server that mediates an electronic mail sent to a mobile phone has been described. However, the mail server of the present invention is sent to a personal computer. The present invention may be applied to a mail server that mediates incoming email.

It is a schematic diagram which shows an example of the communication system to which one Embodiment of the mail server of this invention was applied. FIG. 3 is a hardware configuration diagram of the mail server. It is a hardware block diagram of a mail server. It is the figure which showed the functional block required for implement | achieving the function (transfer function) peculiar to this embodiment. It is a figure which shows an example of the correspondence table 411 memorize | stored in the correspondence table database 410. FIG. It is a flowchart figure which shows the flow of a process which edits the correspondence table 411. It is a flowchart figure which shows the flow of the process which transmits / transfers the electronic mail sent toward the mobile phone.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Mobile phone 20 Base station 21 Internet network 22 Antenna 30 Personal computer 200 Mail server 201 Main body apparatus 201a MO loading slot 201b CD / DVD loading slot 202 Image display apparatus 202a Display screen 203 Keyboard 204 Mouse 210 Bus 211 CPU
212 RAM
213 Hard disk controller 214 MO drive 216 Mouse controller 217 Keyboard controller 218 Display controller 221 Hard disk device 310 E-mail reception unit 320 Authentication unit 330 Notification unit 340 Database control unit 350 E-mail transmission unit 360 Mail server control unit 410 Correspondence table database 420 E-mail Memory

Claims (6)

In a mail server that mediates the sending and receiving of emails,
A correspondence table storage unit that stores a correspondence table of a destination address of the email, a maximum size of the email that is allowed to be transmitted to the destination address, and a forwarding address of the email;
A mail receiving unit that receives an email sent to a predetermined destination address;
The maximum size recorded in the correspondence table in which the size of the received email received by the mail receiving unit is associated with the destination address that matches the destination address of the received email in the correspondence table In the following cases, the received e-mail is transmitted to the destination address of the received e-mail, and when the size of the received e-mail exceeds the maximum size, the received e-mail is In place of sending to a destination address, a mail sending unit is provided that forwards the received e-mail to the destination address associated with the destination address and recorded in the correspondence table. A mail server characterized by that. An edit information receiving unit for receiving edit information for editing the correspondence table stored in the correspondence table storage unit;
The mail server according to claim 1, further comprising: a correspondence table editing unit that edits the correspondence table based on the editing information received by the editing information receiving unit. An authentication unit for authenticating a source of the editing information;
The correspondence table editing unit edits a column of a destination address that is the same as the address of the transmission source in the correspondence table based on editing information transmitted from an authenticated transmission source. The mail server according to claim 1.   The mail transmission unit is configured to transmit a predetermined message to a destination address of the received e-mail when the received e-mail is transferred toward a transfer destination address recorded in the correspondence table. The mail server according to claim 1. In addition to the transmission destination address, the maximum size, and the transfer destination address, the correspondence table stored in the correspondence table storage unit further includes an e-mail transmitted to the transmission destination address as the transmission destination address. When it is transferred to the transfer destination address that is recorded in association, the notification content to be notified to the transmission destination address is recorded in association with it,
The mail transmission unit is associated with the transmission destination address toward the transmission destination address of the reception electronic mail when the reception electronic mail is transferred toward the transmission destination address recorded in the correspondence table. 2. The mail server according to claim 1, wherein a message according to the notification content stored in the correspondence table is transmitted. In a mail server program executed in a computer system and mediating transmission / reception of electronic mail to the computer system,
On the computer system,
A correspondence table storage unit that stores a correspondence table of a destination address of the email, a maximum size of the email that is allowed to be transmitted to the destination address, and a forwarding address of the email;
A mail receiving unit that receives an email sent to a predetermined destination address;
The maximum size stored in the correspondence table in which the size of the received email received by the mail receiving unit is associated with the destination address that matches the destination address of the received email in the correspondence table In the following cases, the received e-mail is transmitted to the destination address of the received e-mail, and when the size of the received e-mail exceeds the maximum size, the received e-mail is Instead of sending to a destination address, a mail sending unit is configured to forward the received e-mail toward the forwarding address associated with the destination address and stored in the correspondence table. A mail server program characterized by that.

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