JP2009077091A - Electronic mail server system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic mail server system for check of contents of a non-corresponding attached file by a destination terminal of an electronic mail. <P>SOLUTION: A mail server 11 of the electronic mail server system 10 acquires from datadase 12, when an attached file is added to the electronic mail received, attribute information indicating display capability of the attached file at the destination terminal of the electronic mail and determines whether the attached file can be displayed or not by the destination terminal based on the attribute information. When display is impossible, a web server 13 determines the format that can be displayed with the destination terminal based on the attribute information and converts the attached file to the format to be displayed for making public to the web. Moreover, the mail server 11 transmits a message to the destination of publication to the destination terminal. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electronic mail server system having a mail server function for managing transmission / reception of electronic mail and a Web server function for publishing files on the Web (World Wide Web).

In general, mobile terminal devices such as mobile phones and PDAs (Personal Digital Assistants) do not have word processing software or spreadsheet software installed on PCs (Personal Computers), and their application software. Receiving is restricted even if the file created in is attached to an e-mail. For example, even if a document file created with word processing software, a spreadsheet file created with spreadsheet software, or an image file created with image software is attached to an e-mail, the corresponding application software is installed. For mobile terminal devices that do not, the mail server restricts (deletes) reception of these attached files and distributes only e-mail (mail body). As a result, the content of the received e-mail is converted into text format or HTML (Hyper Text
It is displayed by e-mail software that supports the Markup Language format, and the contents of the attached file are not displayed.

  Therefore, in order to be able to confirm the contents of the attached file, the mail server that has received the e-mail with the attached file notifies the mobile terminal device to that effect and uses the received mobile terminal device. When a user ID is input to a printer, a technique has been proposed in which a mail server receives a notification from the printer and transfers an attached file corresponding to the user ID to the printer for printing (for example, see Patent Document 1).

  In addition, a technique for converting a transmission message received from a transmission terminal into data that can be used by the mail server at the reception terminal has been proposed. In this technique, the data processing capability of the reception terminal (support / non-support of HTML format) is proposed. In response to this, an important part of the transmission message is highlighted in the HTML format, or additional information such as an advertisement is inserted into the transmission message in the HTML format (for example, see Patent Document 2).

JP 2002-41422 A JP 2002-157196 A

  However, since the technique of Patent Document 1 needs to print an attached file, the contents of the attached file cannot be confirmed immediately after receiving the mail. Furthermore, if the content of the attached file cannot be confirmed only with the mobile terminal device, and the user cannot operate the printer outside the network, it is impossible to confirm the content by printing the attached file.

  In the technique of Patent Document 2, data conversion performed according to the capability of the receiving terminal is a selection of text format or HTML format, and data conversion such as a document file or an image file is not considered. It is impossible to confirm the contents of the file format. Even if this technology can be used for a text file that can be converted into a text format, if the file size is large, the storage of the receiving terminal may be compressed.

  An object of the present invention is to provide an electronic mail server system capable of confirming the contents of an incompatible attached file by an electronic mail destination terminal.

  The gist of the present invention for achieving the object lies in the inventions of the following items.

[1] receiving means for receiving an e-mail with a specified address;
An acquisition unit that acquires attribute information indicating display capability of an attached file at a destination terminal of the email when an attached file is added to the email received by the receiving unit;
Determining means for determining whether the destination terminal can display the attached file attached to the e-mail based on the attribute information;
A publishing unit for determining a format that can be displayed by the destination terminal based on the attribute information when the determining unit determines that display is impossible, and converting the attached file into the displayable format and publishing the web; ,
Notification means for notifying the destination terminal of the publication destination by the publication means;
An e-mail server system comprising:

  In the above invention, when an attached file is added to the received e-mail, whether or not the attached file can be displayed by the destination terminal based on the attribute information indicating the display capability of the attached file at the e-mail destination terminal. Judging. When the display is impossible, the format that can be displayed by the destination terminal is determined based on the attribute information, the attached file is converted into the displayable format and published to the web, and the destination is notified to the destination terminal.

  As a result, the user who uses the destination terminal uses the web browsing function (web browser) installed in the terminal to access the notified publication destination, and normally attaches incompatible attachments that cannot be confirmed on the web. You can browse at.

[2] The acquisition unit includes a storage unit that stores a destination and the attribute information of the destination terminal in association with each other, and acquires the attribute information with reference to the storage unit. The e-mail server system described.

  In the above invention, the acquisition unit includes the storage unit that stores the destination and the attribute information of the destination terminal in association with each other, so that the acquisition unit can easily and quickly acquire the attribute information by referring to the storage unit based on the destination.

[3] The acquisition unit requests the attribute information of the destination terminal from the domain server of the destination of the e-mail when the attribute information of the destination terminal of the received e-mail is not stored in the storage unit. If the information can be acquired, the attribute information is additionally stored in the storage means. The electronic mail server system according to [2].

  In the above invention, the attribute information can be acquired from the domain server that is the destination of the e-mail even when the attribute information of the destination terminal of the received e-mail is not stored in the storage means. Web browsing of attached files can be provided to more terminals including Further, by additionally storing the attribute information acquired from the domain server in its own storage means, the attribute information can be acquired easily and quickly with reference to its own storage means from the next time onward.

[4] The acquisition unit acquires the attribute information by inquiring of an external storage unit that stores the destination and the attribute information of the destination terminal in association with each other. E-mail server system.

  In the above invention, since the acquisition means can acquire attribute information from an external storage means, it is not necessary to provide a storage means for storing attribute information. Thereby, the structure of an acquisition means and the whole system can be simplified. Further, if a large number of external storage means can be used, more terminal attribute information can be acquired, and web browsing of attached files can be provided to more terminals.

[5] The electronic mail according to any one of [1] to [4], wherein the electronic mail from which the attached file has been deleted is delivered to the destination when the determination unit determines that display is impossible. E-mail server system.

  In the above invention, when the attached file cannot be displayed by the destination terminal, the e-mail from which the attached file has been deleted is delivered to the destination. Therefore, the user using the destination terminal can use the e-mail function ( E-mail can be viewed using e-mail software.

  According to the electronic mail server system of the present invention, it is possible to check the contents of an incompatible attached file by an electronic mail destination terminal.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows an overall configuration of an electronic mail server system 10 according to an embodiment of the present invention, an information terminal (user terminal) in which electronic mail transmission / reception processing is performed by the electronic mail server system 10, and an outside of the electronic mail server system 10. An example of the domain server provided in FIG.

  The e-mail server system 10 has a function (mail server function) for managing transmission / reception of e-mails to / from a plurality of user terminals such as PCs, PDAs, and mobile phones in its own network, and a function for publishing files to the Web (Web server function) In addition, when the user terminal cannot display the attached file of the e-mail, it has a function of publishing the attached file on the Web and notifying the user terminal of the publication destination.

  In order to realize the above functions, the e-mail server system 10 includes a mail server 11, a database 12, and a Web server 13, and the mail server 11 and the Web server 13 are connected via a LAN (Local Area Network). So that they can communicate with each other. The mail server 11 is connected to a plurality of external domain servers 14 and 16 via a WAN (Wide Area Network) so as to be able to communicate with each other.

  The mail server 11 has a function of managing transmission / reception of e-mails by a plurality of user terminals in its own network, and when an attached file is added to the e-mail, the user terminal of the e-mail destination displays the attached file It is determined whether or not the file can be displayed. If the file cannot be displayed, the attached file is transferred to the Web server 13 and the attachment destination of the attached file is notified to the user terminal. It has a function for normal distribution to terminals.

  The plurality of user terminals managed by the mail server 11 are, for example, non-portable desktop PCs 20A and 21A, portable sub-notebook PCs 21B, PDA 21C, and cellular phones 21D. The desktop PCs 20A and 21A are connected to the mail server 11 through a wired network, and the sub-notebook PCs 21B, PDA 21C, and the mobile phone 21D are connected to the mail server 11 through a wireless network.

  Among the above user terminals, the desktop PCs 20A and 21A are general-purpose OS (Operating System) and Web browsers (Internet software), e-mail software, word processing software, spreadsheet software, image software, etc. operating on the OS. Equipped with various application software, Web browsing function, e-mail function, creation function of various files (text file, spreadsheet file, image file, etc.), function to send various files attached to e-mail, received It has a function to open various files attached to e-mails with corresponding application software and display them on the screen.

  The sub-notebook PC 21B, PDA 21C, and mobile phone 21D as portable terminal devices are equipped with an OS and a Web browser and electronic mail software that operate on the OS, and have a Web browsing function and an electronic mail function. However, the types of OS, Web browser, and e-mail software are different.

  For example, the sub-notebook type PC 21B is equipped with a general-purpose OS, a general-purpose Web browser, and e-mail software. The PDA 21C is equipped with a dedicated OS (PDA OS), a PDA Web browser (PDA browser) and e-mail software (PDA e-mail software). The mobile phone 21D is equipped with a dedicated OS (OS for mobile terminals), a full browser for mobile terminals (mobile terminal browser), and e-mail software (mobile terminal e-mail software). Even in the same type of mobile terminal device, the types of OS, Web browser, and e-mail software may differ depending on the model. Therefore, the display formats of the Web browser and the e-mail software are different in these portable terminal devices. Although the types of e-mail software are different, the e-mail software of each portable terminal device is compatible with text format and HTML format.

  Furthermore, each mobile terminal device does not have word processor software, spreadsheet software, image software, etc. installed in the desktop PCs 20A and 21A, and files created with these application software are attached to e-mails. Even reception is restricted. For example, even if a text file created with word processing software or spreadsheet software, or an image file created with image software is attached to an e-mail, These mail attachments are restricted (deleted) by the mail server 11 so that only electronic mail (mail body) is delivered.

  The database 12 has a function of storing the attribute information of the user terminal managed by the mail server 11 for each destination (e-mail address) and updating the information according to a request from the mail server 11. This attribute information is information indicating the display capability of the user terminal for an attached file of an electronic mail. Specifically, it is information that can specify a format (file format) in which an attached file can be displayed by the user terminal. Specifically, an OS, a Web browser, and a ROM (Read Only Memory) installed in the user terminal. Information about

  The web server 13 has a function of publishing a file on the web, further processes the file (attached file) received from the mail server 11 into a format that can be displayed by the user terminal, and creates a web publishing folder (HTTP (Hyper Text). Transfer Protocol) is provided to the virtual directory 13A) to perform Web publishing processing.

  The domain servers 14 and 16 have a function of managing transmission / reception of e-mails by a plurality of user terminals (PC, PDA, mobile phone, etc.) in the own domain. The databases 15 and 17 store the attribute information (model, OS, browser, ROM, etc.) of the user terminal managed by the domain servers 14 and 16 as a database for each destination (e-mail address), and store the domain server 14. , 16 has a function to update information according to the request.

  FIG. 2 shows the configuration of the mail server 11. The mail server 11 includes a reception control unit 30, an e-mail data control unit 31, an attached file data control unit 32, an attribute information control unit 33, and a transmission control unit 34.

  The reception control unit 30 divides an email with an attached file received from the user terminal of the email sender 20 into email data (mail body) including destination data and attached file data, thereby It has a function of passing to the email data control unit 31 and passing the attached file data to the attached file data control unit 32. Furthermore, a function of extracting destination data from the received electronic mail and passing this destination data to the attribute information control unit 33 as attribute information acquisition data is provided.

  The e-mail data control unit 31 has a function of adding the disclosure destination (URL; Uniform Resource Locator) received from the attached file data control unit 32 to the e-mail data received from the reception control unit 30 and passing it to the transmission control unit 34. I have.

  The attached file data control unit 32 determines whether the display of the attached file by the destination user terminal is based on the attached file data received from the reception control unit 30 and the attribute information received from the attribute information control unit 33; A function of setting the destination of the attached file data to the Web server 13 when it is determined that the display is impossible, and adding the attribute information and destination data received from the attribute information control unit 33 to the attachment file data and passing it to the transmission control unit 34; And a function of passing the attachment destination data (URL) on the Web to the e-mail data control unit 31.

  Upon receiving the attribute information acquisition data from the reception control unit 30, the attribute information control unit 33 accesses the database 12, acquires attribute information corresponding to the attribute information acquisition data from the database 12, and acquires attribute information acquisition data (destination data). In addition, it has a function of passing to the attached file data control unit 32.

  The transmission control unit 34 has a function of receiving e-mail data received from the e-mail data control unit 31 to which the attached file is deleted and the disclosure destination of the attached file is added to a destination (mail recipient 21), and an attachment. And a function of transmitting the attached file data to which the attribute information and the destination data are added, received from the file data control unit 32, to the Web server 13.

  FIG. 3 shows the configuration of the Web server 13. The Web server 13 includes a reception control unit 40, an access control unit 41, a data analysis unit 42, a data processing unit 43, an internal database 44, and a public control unit 45.

  The reception control unit 40 divides the received data received from the mail server 11 into attached file data (attached file original), attribute information, and destination data, and passes the destination data to the access control unit 41 to attach the attached file data. And the attribute information are provided to the data analysis unit 42.

  The access control unit 41 has a function of generating access restriction information from destination data received from the reception control unit 40 and passing it to the public control unit 45.

  The data analysis unit 42 determines the type of processing for publishing the attached file data on the Web from the attached file data and attribute information received from the reception control unit 40, and the attached file data is processed along with the processing information generated as a determination result. A function of passing to the processing unit 43 is provided.

  The data processing unit 43 accesses the internal database 44 based on the processing information received from the data analysis unit 42, acquires template data corresponding to the processing information from the internal database 44, and receives the attachment received from the data analysis unit 42. A function of processing the file data into a file format suitable for Web publication (format conversion) of the corresponding user terminal (sub-notebook type PC 21B, PDA 21C, mobile phone 21D, etc.) using the template data and passing it to the publication control unit 45 is provided. ing.

  The internal database 44 has a function of storing various template data used for processing attached file data in a database for each processing information.

  The publishing control unit 45 registers the processed attachment file data received from the data processing unit 43 in the Web publishing folder and publishes the Web, and the WAN 50 to the processed attachment file data that has been published to the Web. A function of controlling access restriction based on the access restriction information received from the access control unit 41 with respect to the accessed access.

  FIG. 4 shows an example of attribute information stored in the database 12 of the mail server 11. As shown in FIG. 4, the database 12 stores, for each registered email address of the user, the type (name) of the OS installed in the user terminal, the version of the OS, the type of browser (name), the version of the browser, and the ROM version. Stores attribute information such as type (name) and ROM version.

  5 and 6 show examples of attribute information stored in the databases 15 and 17 of the domain servers 14 and 16. As shown in FIGS. 5 and 6, the databases 15 and 17 include, for each registered email address of the user, the model (name) of the user terminal, the model number, the type (name) of the OS installed in the user terminal, and the OS Attribute information such as version, browser type (name), browser version, ROM type (name), and ROM version are stored.

  In addition to the above attribute information, the databases 12, 15, and 17 may store the OS language, the type (name) of the corresponding application software, localization information (time zone, country name, etc.), and the like. .

  Next, the operation of the electronic mail server system 10 will be described.

  FIG. 7 shows the flow of processing of an email with an attached file by the mail server 11.

  When the mail sender 20 (see FIG. 1) operates the desktop PC 20A to send an email with an attached file, the reception control unit 30 (see FIG. 2) of the mail server 11 sends the email with the attached file. Receive (step S101). The reception control unit 30 divides the received e-mail with the attached file into e-mail data including the destination data (e-mail body) and attached file data, and sends the e-mail data to the e-mail data control unit 31. Transfer the attached file data to the attached file data control unit 32. Further, the reception control unit 30 extracts destination data (e-mail address) from the e-mail (step S102), and transfers this destination data to the attribute information control unit 33 as attribute information acquisition data.

  When the attribute information control unit 33 receives the attribute information acquisition data from the reception control unit 30, the attribute information control unit 33 accesses the database 12 (step S103), and the same destination (e-mail address) as the destination indicated by the attribute information acquisition data is registered. (Step S104; Yes), the attribute information (information about OS, browser, ROM, etc. (see FIG. 4)) corresponding to the destination is acquired from the database 12 and the attached file data control unit 32 together with the destination (destination data). (Step S105).

  When the attached file data control unit 32 receives the attached file data from the reception control unit 30 and receives the attribute information and the destination data from the attribute information control unit 33, the attachment file data display unit determines whether or not the attached user terminal can display the attached file. Is determined based on the attached file data and attribute information (step S106).

  The determination of the display capability of the attached file by the user terminal is performed by comparing the attribute information with the extension of the attached file, for example. For example, it is determined whether or not the extension of the attached file is included in the extensions supported by the Web browser. If there is no extension, it is determined that the attached file cannot be displayed (Web conversion is required), and the extension If there is, it is determined that the attached file can be displayed (Web conversion is unnecessary).

  If the display of the attached file is not possible (step S106; Yes), the attached file data control unit 32 sets the destination of the attached file data in the Web server 13 (step S107), and sets the attribute information and the destination in the attached file data. Data (e-mail address) is added and transferred to the transmission control unit 34 (step S108). Further, the attached file data control unit 32 transmits the disclosure destination (URL) of the attached file on the Web to the e-mail data control unit 31.

  The e-mail data control unit 31 adds the disclosure destination received from the attached file data control unit 32 to the e-mail data received from the reception control unit 30 and transfers it to the transmission control unit 34 (step S109).

  Then, the transmission control unit 34 distributes the e-mail data received from the e-mail data control unit 31 to which the attached file is deleted and the disclosure destination of the attached file is added to the destination (the mail recipient 21). The attached file data with the attribute information and destination data added received from the file data control unit 32 is transmitted to the Web server 13 (step S110).

  For example, when the desktop PC 20A shown in FIG. 1 attaches a document file, a spreadsheet file, an image file, etc. to an e-mail and sends it to the sub-notebook PC 21B, PDA 21C, or mobile phone 21D, the above step S106 (Yes ) To S110 are performed.

  If the attached file can be displayed (step S106; No), the attached file data control unit 32 transfers the attached file data to the e-mail data control unit 31. The e-mail data control unit 31 adds the attachment file data received from the attachment file data control unit 32 to the e-mail data received from the reception control unit 30, and forwards the original attachment-attached e-mail to the transmission control unit 34. To do.

  The transmission control unit 34 distributes the attached file-attached e-mail received from the e-mail data control unit 31 to the destination (mail recipient 21) (step S110).

  For example, when the desktop PC 20A shown in FIG. 1 attaches a document file, a spreadsheet file, an image file, etc. to an email and transmits it to the desktop PC 21A, the process proceeds from step S106 (No) to step S110. Processing is performed.

  If the attribute information control unit 33 accesses the database 12 (step S103) and the corresponding destination data (e-mail address) is not registered and cannot be acquired (step S104; No), the mail server 11 determines the destination. Access to the external domain servers 14 and 16 corresponding to the domain (aaa.ne.jp/bbb.ne.jp, etc.) (step S111), and submit an acquisition request (inquiry) for attribute information corresponding to the corresponding destination data. This is performed (step S112).

  When the acquisition application is granted to the domain servers 14 and 16, the mail server 11 sends the attribute information (model, OS, browser, ROM related information (see FIGS. 5 and 6)) corresponding to the destination data to the domain. Acquired from the databases 15 and 17 of the servers 14 and 16, the attribute information is newly registered in the database 12 in association with the destination data (step S 114), and the process returns to step S 103. Thereafter, by each processing from step S104 (Yes) to step S110, the distribution of the e-mail to the destination and the transmission of the attached file to the Web server 13 are performed based on the newly registered attribute information.

  FIG. 8 shows the flow of attachment file publishing processing by the Web server 13.

  In the Web server 13, when the reception control unit 40 (see FIG. 3) receives the attached file data to which the attribute information and the destination data are added from the mail server 11, the reception control unit 40 converts the received data into the attached file. Data (attached file original), attribute information, and destination data are divided (step S122), the destination data is transferred to the access control unit 41, and the attached file data and attribute information are transferred to the data analysis unit 42. (Step S123).

  The data analysis unit 42 determines the type of processing for publishing the attached file data on the Web from the attached file data and attribute information received from the reception control unit 40, and the attached file data is processed along with the processing information generated as a determination result. Transmit to the processing unit 43. For example, if the attachment file is to be disclosed to a sub-notebook PC 21B, PDA 21C, or mobile phone 21D, processing information that instructs processing (conversion) into a file format suitable for the Web browser of each mobile terminal device is generated. To the data processing unit 43.

  The data processing unit 43 accesses the internal database 44 based on the processing information received from the data analysis unit 42 (step S124), acquires template data corresponding to the processing information from the internal database 44, and the data analysis unit 42. The attached file data received from is processed into a file format suitable for Web publication by various Web browsers using template data (format conversion) and transferred to the publication control unit 45 (step S125).

  Further, the access control unit 41 generates access restriction information from the destination data received from the reception control unit 40 and transmits it to the disclosure control unit 45 (step S126).

  Then, the public control unit 45 registers the processed file data (processed attached file data) received from the data processing unit 43 in the Web public folder (HTTP virtual directory 13A (see FIG. 1)). The access restriction information received from the access control unit 41 is added to the processed file data, and access to the processed file data published on the Web is restricted based on the access restriction information (public restriction). Is performed (step S127). For example, when the user terminal accesses the processed file data with a web browser, the access restriction requires the input of information (for example, an e-mail address) for authentication of the access right, and the input information is successfully authenticated. Controls such as permitting access to the machining file data only when it is done. Further, the publication control unit 45 deletes the target processed file data from the Web publishing folder at the timing of selection of deletion by the access user or the expiration of the publication.

  The Web server 13 also stores a log related to reception / processing / registration / deletion of attached file data.

  Thus, in the electronic mail server system 10 according to the present embodiment, when the attached file is added to the received electronic mail, the mail server 11 acquires attribute information of the destination terminal of the electronic mail from the database 12, It is determined whether the attached file can be displayed by the destination terminal based on the attribute information. When the display is impossible, the Web server 13 determines the format that can be displayed by the destination terminal based on the attribute information, converts the attached file into the displayable format and publishes the Web, and the mail server 11 Is added to the e-mail and delivered to the destination terminal for notification.

  As a result, when an e-mail with an attached file is transmitted from the desktop PC 20A to the mobile terminal device (sub-notebook PC 21B / PDA 21C / mobile phone 21D) by the operation of the mail sender 20 shown in FIG. The e-mail from which the file has been deleted is distributed to the mobile terminal device, and the mail recipient 21 can view the e-mail using e-mail software installed in the mobile terminal device. Further, by accessing the public address (HTTP virtual directory 13A of the Web server 13) added to the e-mail using a Web browser of the mobile terminal device, an unsupported attached file that cannot be normally confirmed is accessed on the Web. Can be viewed at. In particular, in the present embodiment, the attachment file is processed (file format conversion) according to the attribute of the destination terminal (whether it is a portable PC, a PDA, or a full-browser compatible mobile phone, etc.) It is possible to access an attached file in a format optimized for the type of the destination terminal, and to provide the maximum resource (information resource) browsing with a minimum burden on the destination terminal.

  In addition, the mail server 11 includes the database 12 that stores the destination and the attribute information of the destination terminal in association with each other, so that the attribute information can be easily and quickly acquired with reference to the database 12 based on the destination. Furthermore, even when the corresponding attribute information is not registered in the database 12, the corresponding attribute information can be acquired from the databases 15 and 17 managed by the external domain servers 14 and 16, and thus includes a large number of terminals with different domains. , Web browsing of attached files can be provided to more terminals. Further, the mail server 11 can additionally and easily acquire the attribute information by referring to its own database 12 from the next time by additionally registering the attribute information acquired from the outside in its own database 12.

  The embodiment of the present invention has been described with reference to the drawings. However, the specific configuration is not limited to that shown in the embodiment, and there are changes and additions within the scope of the present invention. Are also included in the present invention.

  For example, although the mail server 11 and the Web server 13 are configured separately in the embodiment, they may be configured by a single server.

  In addition, as exemplified in FIGS. 4 to 6, the attribute information is information on the OS, the Web browser, the ROM, or the model or model number. In order to determine the display capability of the terminal with respect to the attached file of the e-mail, Not all of these attribute information is required. Since the display capability of the attached file can be determined by the type of application software (including a web browser) installed in the terminal and the type of file format supported by the application software, at least the application installed in the terminal It can be determined if there is information indicating the type of software or information indicating the type of file format supported by the application software installed in the terminal. For example, in the case of a mobile phone or PDA, the display capability of the attached file can be determined if there is at least information indicating the type and version of the Web browser.

  For example, even when a plurality of destinations are set for one e-mail with an attached file, the attachment file is converted to Web for each destination (for each receiving terminal) by the processing of the e-mail with an attached file described in the embodiment. / Non-Web can be performed.

  That is, when the mail server 11 receives an e-mail with an attached file in which a plurality of destinations are set, the mail server 11 stores the attribute information of each destination terminal based on each destination data (attribute information acquisition data) extracted from the e-mail. The attached file display ability (Web / non-Web) is determined for each destination terminal based on the attribute information. Then, a normal mail transmission process is performed for a displayable destination terminal, and an attachment file Web publishing process is performed in cooperation with the Web server 13 for a non-displayable destination terminal. The attachment file can be converted to Web / non-Web individually for a plurality of destinations (destination terminals) set in the mail.

  Similarly, when a plurality of types of attached files are added to one e-mail, the attachment file is processed according to the attribute of the destination terminal by the processing of the e-mail with the attached file described in the embodiment. It can be made public for each attached file.

The figure which shows an example of the whole structure of the electronic mail server system which concerns on embodiment of this invention, and the domain server provided in the exterior of the information terminal with which an electronic mail server system performs transmission / reception processing of an electronic mail, or an electronic mail server system It is. It is a functional block diagram which shows the structure of the mail server which concerns on embodiment of this invention. It is a functional block diagram which shows the structure of the web server which concerns on embodiment of this invention. It is a figure which shows an example of the attribute information stored in the database of the mail server which concerns on embodiment of this invention. It is a figure which shows an example of the attribute information stored in the database of the external domain server which concerns on embodiment of this invention. It is a figure which shows an example of the attribute information stored in the database of the external domain server which concerns on embodiment of this invention. It is a flowchart which shows the flow of a process of the electronic mail with an attachment file by the mail server which concerns on embodiment of this invention. It is a flowchart which shows the flow of the publication process of the attached file by the Web server which concerns on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... E-mail server system 11 ... Mail server 12 ... Database 13 ... Web server 13A ... HTTP virtual directory 14 ... Domain server 15 ... Database 16 ... Domain server 17 ... Database 20 ... Mail sender 20A ... Desktop type PC
21 ... Mail recipient 21A ... Desktop PC
21B ... Sub-notebook PC
21C ... PDA
21D ... Mobile phone 30 ... Reception control unit 31 ... E-mail data control unit 32 ... Attached file data control unit 33 ... Attribute information control unit 34 ... Transmission control unit 40 ... Reception control unit 41 ... Access control unit 42 ... Data analysis unit 43 ... Data processing part 44 ... Internal database 45 ... Public control part 50 ... WAN

Claims (5)

A receiving means for receiving an email addressed to the destination;
An acquisition unit that acquires attribute information indicating display capability of an attached file at a destination terminal of the email when an attached file is added to the email received by the receiving unit;
Determining means for determining whether the destination terminal can display the attached file attached to the e-mail based on the attribute information;
A publishing unit for determining a format that can be displayed by the destination terminal based on the attribute information when the determining unit determines that display is impossible, and converting the attached file into the displayable format and publishing the web; ,
Notification means for notifying the destination terminal of the publication destination by the publication means;
An e-mail server system comprising: The electronic device according to claim 1, wherein the acquisition unit includes a storage unit that stores a destination and the attribute information of the destination terminal in association with each other, and acquires the attribute information with reference to the storage unit. Mail server system. If the attribute information of the destination terminal of the received e-mail is not stored in the storage means, the acquiring means can request and acquire the attribute information of the destination terminal from a domain server of the e-mail destination The electronic mail server system according to claim 2, wherein the attribute information is additionally stored in the storage means. The electronic mail server according to claim 1, wherein the acquisition unit acquires the attribute information by inquiring of an external storage unit that stores the destination and the attribute information of the destination terminal in association with each other. system. The electronic mail server system according to any one of claims 1 to 4, wherein when the determination unit determines that display is impossible, the electronic mail from which the attached file has been deleted is distributed to the destination. .

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