JP2003030117A - Electronic mail server, electronic mail storing and transfer method, program, and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate various troubles which are used when electronic mail with an attached file composed of much data is received. SOLUTION: When the electronic mail with an attached file which is addressed to a user who belongs to a local device is received (YES at S302, S303, and S305), the electronic mail is separated into a body part and the attached file, separate attached file information showing that there is the separated attached file is added (S311) to the separated body part, and they are stored in a mail BOX for the user (S318 in Fig. 5). At a user's request, the body part with the added separated attached file information which is stored in the user mail BOX or the attached file stored in an attached file BOX for the user is read out and transferred to the user side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic mail server, an electronic mail saving / transferring method, a program, and a storage medium, and more particularly to an electronic mail for receiving and saving an electronic mail with an attached file addressed to a user belonging to the own apparatus. The present invention relates to a mail server, an electronic mail storage / transfer method applied to the electronic mail server, a program for causing a computer to execute the electronic mail storage / transfer method, and a storage medium storing the program.

[0002]

2. Description of the Related Art In recent years, it has become widespread to send and receive e-mail between computers connected to each other by a public line such as a telephone line or a corporate communication network such as a LAN.

FIG. 7 is a block diagram showing the configuration of a conventional electronic mail server that handles electronic mail.

Reference numeral 501 denotes a user I / F unit, which has a user authentication function, a transfer function for transferring a user-transmitted mail to a mail processing unit 502 described later in response to a mail access from the user, and a user-specific mail BOX 505 stored later. It has a function of transferring and deleting the user-specified mail to the user, a function of managing and setting user information such as a user password, and the like.

Reference numeral 502 denotes a mail processing unit, which is the user I / F unit 501 and a server I / F unit 503 described later.
A function of referencing the destination address of the email input from the user and storing the email in the user-specific mail BOX 505 corresponding to the destination user, a function of forwarding the email to another email server, or an unprocessable email. It has an error mail reply function to the sender address for mail.

Reference numeral 503 denotes a server I / F unit, which is responsible for communication with other electronic mail servers and which transfers the received mail to the above-mentioned mail processing unit 502, and the mail processing unit 50.
It has a function of transferring the transfer mail from the server 2 to another electronic mail server.

Reference numeral 504 is a mail box, and the inside thereof is a mail box 5 for each user assigned to each user.
05, and has a function of temporarily storing a mail addressed to the user. The maximum usable capacity of the user-specific mail box 505 is generally set for each user, and new user-addressed mail cannot be stored beyond that capacity.

Reference numeral 506 is a user information management table, which holds a user account, a user password, the maximum usable capacity of the user mail BOX 505, the number of mails addressed to the user, and the like, and is managed by the user I / F unit 501. .

In the electronic mail server having such a structure, in recent years, in addition to text information, data files of various formats such as voice, still image, and moving image are transmitted and received. The use of so-called e-mails with attachment files, which are converted into text data) and added to the body text data and sent as e-mails, is increasing. Generally, the conversion method is MIME (Multipurpose Interne
t Mail Extension) method is widely used. The user who receives the e-mail with the attached file needs to reverse-convert the attached text data portion and restore the original data file (attached file). Generally, such a function of restoring an attached file is often included in an electronic mail application used by a user as one of optional functions.

Such an electronic mail with an attached file is also used in a digital camera with a communication function, for example, as a means for transferring a taken still image as an attached file to a remote place.

[0011]

However, in the above-mentioned conventional e-mail with an attached file, especially when the content of the attached file is a still image or a moving image, the data size of the attached text data generated by conversion is large. Therefore, the email data size also increases.

This is particularly the case where the recipient's e-mail server causes the capacity to be exceeded and the subsequent arriving e-mail cannot be received when the total amount of stored data of the received e-mail for each user is limited. Cause to cause.

Further, in general, a network having a relatively small transmission capacity (for example, a telephone line) is often used for the connection between the recipient and the electronic mail server, and such a network is used as described above. When an e-mail with an attached file having a large data size is downloaded, it takes a long time to download another e-mail that is also downloaded at the same time.

Recently, cases of sending and receiving e-mails using mobile phones and personal digital assistants have been increasing, and the e-mail applications on those terminals include e-mails with attached files as described above. When received, some attachments separate the attached text data and display only the email text of the body, and some have no function to restore the attached text data to an attachment file. In this case, of course,
Even if such a function is provided, there is also a problem that the attached file data downloaded over time is wasted because there is no application corresponding to the restored attached file.

The present invention has been made in view of the above problems, and an electronic mail server and an electronic mail which eliminate various problems occurring when receiving an electronic mail to which a file having a large amount of data is attached. An object is to provide a storage and transfer method, a program, and a storage medium.

[0016]

In order to achieve the above object, according to the invention of claim 1, an electronic file with an attached file, which is provided with a first and a second storage device and is addressed to a user belonging to the device, An e-mail server that receives and stores e-mail, when an e-mail with an attachment file addressed to a user belonging to the device itself is received, a separation unit that separates the e-mail into a body portion and an attachment file, and the separation unit. Separated by the first storage means for storing in the first storage device at least the separated attachment file information indicating that the separated attachment file exists, in the body portion separated by Second storage means for storing the attached file in the second storage device, and stored in the first storage device in response to a user request.
There is provided an electronic mail server comprising: a text part to which separate attachment file information is added, or a transfer means for reading an attachment file stored in the second storage device and transferring the read file to the user side. .

According to a sixth aspect of the present invention, in an electronic mail server that includes the first and second storage devices and receives and saves an electronic mail with an attached file addressed to a user who belongs to the own apparatus, When an e-mail with an attachment file addressed to a user belonging to is received, the e-mail is separated into a body part and an attachment file, and the attachment file separated by the separation means is stored in the first storage device. First storing means for storing, and a first electronic mail composed of a text portion separated by the separating means,
A second electronic mail which is composed of location information indicating a storage position of the attached file separated by the separating means, and which stores a second electronic mail having the same destination as the first electronic mail in the second storage device; And the attachment file stored in the first storage device or the first and second mails stored in the second storage device according to the user's request, There is provided an electronic mail server having a transfer means for transferring.

According to the invention of claim 7, the first
And an email storage transfer method applied to an email server that includes a second storage device and receives and saves an email with an attachment file addressed to a user who belongs to the device itself. When an e-mail with an attachment file is received, a separation step of separating the e-mail into a body part and an attachment file, and a message that at least the separated attachment file exists in the body part separated by the separation step are described. Firstly, storing the separated attachment file information shown in the first storage device.
Storage step, a second storage step of storing the attached file separated by the separation step in the second storage device, and a storage step of storing the attached file in the first storage device in response to a user's request. And a transfer step of reading out a body part to which attached file information is added or an attached file stored in the second storage device and transferring the read file to the user side. It

According to the invention described in claim 8, in the transferring step, the separation stored in the first storage device is performed in response to a user's request for transferring the body part of the electronic mail. A first transfer step of reading out the body part to which the attached file information is added and transferring it to the user side, and a user who views the separated attached file information transferred by the first transfer step and transfers the attached file. And a second transfer step of reading the attached file stored in the second storage device and transferring it to the user side.

According to the thirteenth aspect of the invention, the invention is applied to an e-mail server which is equipped with the first and second storage devices and which receives and saves the e-mail with the attached file addressed to the user belonging to the own device. In the method for storing and transferring electronic mail, when an electronic mail with an attached file addressed to a user belonging to the own device is received, a separating step of separating the electronic mail into a body portion and an attached file; and an attachment separated by the separating step. A first storage step of storing a file in the first storage device, a first e-mail composed of a body part separated by the separation step, and a storage position of an attached file separated by the separation step are shown. The second e-mail, which consists of location information and has the same destination as the first e-mail, is used as the second e-mail.
Second storage step of storing in the first storage device, or the first and second attachment files stored in the second storage device according to a user's request. And a transfer step of transferring the mail to the user side and reading the mail, and a method for storing and transferring electronic mail is provided.

According to the fourteenth aspect of the present invention, the invention is applied to an electronic mail server that includes the first and second storage devices and receives and saves an electronic mail with an attached file addressed to a user who belongs to the own device. In a program for causing a computer to execute the electronic mail storage and transfer method described above, when the electronic mail storage and transfer method receives an electronic mail with an attachment file addressed to a user who belongs to the own device, the electronic mail storage and transfer method is executed. To the first storage device by adding at least separated attachment file information indicating that the separated attachment file exists to the text part separated by the separation step. A first storing step for storing, and an attached file separated by the separating step are stored in the second storage device. A second storage step, in response to a request from a user, stored in said first storage device, body part separated attachment information is added or the second,
And a transfer step of transferring the attached file stored in the storage device and transferring the attached file to the user side.

According to a seventeenth aspect of the invention, the invention is applied to an electronic mail server which is provided with the first and second storage devices and which receives and saves the electronic mail with the attached file addressed to the user belonging to the own device. In a program for causing a computer to execute the e-mail storage / transfer method, when the e-mail storage / transfer method receives an e-mail with an attachment file addressed to a user who belongs to the device, the e-mail is attached to a body part. A separation step of separating the file into a file, a first storage step of storing the attached file separated by the separation step in the first storage device, and a first electronic device including a text portion separated by the separation step. It consists of an email and location information indicating the storage location of the attached file separated by the separation step, A second storage step of storing a second electronic mail having the same destination as the mail in the second storage device, and an attachment file stored in the first storage device in response to a user request. Or a transfer step of reading the first and second mails stored in the second storage device and transferring them to the user side.

Further, according to the invention of claim 18,
A computer that includes the first and second storage devices and stores as a program an electronic mail save / transfer method applied to an electronic mail server that receives and saves an electronic mail with an attached file addressed to a user who belongs to the own device. In a readable storage medium, when the e-mail storage / transfer method receives an e-mail with an attachment file addressed to a user who belongs to the device, a separation step of separating the e-mail into a body part and an attachment file, At least the text portion separated by the separation step,
A first storing step of adding the separated attached file information indicating that the separated attached file exists to the first storage device, and the attached file separated by the separating step in the second storage. A second storing step of storing in the device, and a body part to which separate attachment file information is added stored in the first storage device or stored in the second storage device in response to a user request. And a transfer step of reading out the attached file and transferring the attached file to the user side.

According to the invention of claim 21, the invention is applied to an electronic mail server which is provided with the first and second storage devices and which receives and saves the electronic mail with the attached file addressed to the user belonging to the own device. In a computer-readable storage medium storing an electronic mail storage / transfer method as a program, when the electronic mail storage / transfer method receives an electronic mail with an attached file addressed to a user who belongs to the apparatus, the electronic mail storage / transfer method is used. It comprises a separation step of separating a text part and an attachment file, a first storage step of storing the attachment file separated by the separation step in the first storage device, and a text part separated by the separation step. Location information indicating the storage location of the first electronic mail and the attachment file separated by the separation step. From now, said a second e-mail with the same destination and the first e-mail the second
Second storage step of storing in the first storage device, or the first and second attachment files stored in the second storage device according to a user's request. And a transfer step of reading the mail and transferring the mail to the user side.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIG. 1 is a block diagram showing a configuration of a first embodiment of an electronic mail server according to the present invention.

Reference numeral 101 is a user I / F unit, which is shown in FIG.
In addition to the function of the user I / F unit 501 in the conventional electronic mail server shown in FIG.
Transfer Protocol) having the function of processing access.

Reference numeral 102 denotes a mail processing unit, which is the mail processing unit 50 in the conventional electronic mail server shown in FIG.
In addition to the function that 2 has, it has an attached file separating function. The processing content will be described later.

Reference numerals 103, 104 and 105 denote a server I / F section, a mail BOX and a mail BO for each user.
X, which has the same function as the server I / F unit 503, the mail BOX 504, and the user-specific mail BOX 505 in the conventional electronic mail server shown in FIG.

Reference numeral 106 is a user information management table, the contents of which will be described later with reference to FIG.

Reference numeral 107 is an attached file BOX,
The inside thereof is composed of a user-specific attachment file BOX 108 assigned to each user, and has a function of restoring the attachment text data added to the mail addressed to the user and temporarily storing the generated attachment file. The maximum usable capacity of the user-specific attachment file BOX 108 is set for each user, and a new attachment file cannot be stored in excess of that capacity.

Reference numeral 109 is an FTP server, which downloads an attached file from a user who is authenticated by the user.
User-specific attachment BOX10 in response to a request such as deletion
8 has a function of performing a predetermined process on the attached file held in 8.

FIG. 2 is a diagram showing the contents of the user information management table 106.

The contents of the user information management table 106 are managed by the user I / F unit 101.

In FIG. 2, reference numeral 201 is a user account column, and the user account described here is used for identifying the user and also used for a part of the mail address.

Reference numeral 202 is a password field, and the password described here is used by the user for mail access or F
Used for user authentication when requesting TP access.

Reference numeral 203 is an attached file separation flag column, and the attached file separation flag described here indicates whether or not the user wishes to separate the attached file (YES) or not (NO).

Reference numeral 204 is a column for the number of received mails / number of attached files. The number of received mails and the number of attached files described here are mails addressed to users which are held in the user-specific mail BOX 105 and the user-specific attachment file BOX 108, respectively. Indicates the number of items and the number of attached files.

Reference numeral 205 is a mail BOX usage / maximum capacity column. The mail BOX usage and maximum capacity described here are the current usage of the user-specific mail BOX 105 and the maximum usable capacity allocated to the user. Shown respectively.

Reference numeral 206 is an attached file BOX use / maximum capacity column, and the attached file BOX described here.
Usage and maximum capacity are attached file BOX1 for each user
The present usage amount of 08 and the maximum usable capacity allocated to the user are shown respectively.

As a matter of course, for users who do not want to separate attached files, the user-specific attached file BO
X108 is not assigned.

Next, the processing executed by the mail processing unit 102 will be described with reference to FIGS.

FIGS. 3 to 5 are flowcharts showing the procedure of the processing executed by the mail processing unit 102.

The mail processing unit 102 is the user I / F unit 1.
The process is started by inputting the user-transmitted mail from 01 or the received mail from the server I / F unit 103 (S301).

First, referring to the destination address of the input electronic mail, it is determined whether the destination address is addressed to the own electronic mail server (S302). If it is determined that it is not addressed to the own electronic mail server, the electronic mail server to be transferred next is determined from the destination address, and the electronic mail is transferred via the server I / F unit 103 (S313).

When it is determined in step S302 that the destination user is the own electronic mail server, it is determined whether the destination user of the input electronic mail is registered in the own electronic mail server (S303). If the user designated by the received mail is not registered in the own electronic mail server, an error reply mail is created (S312), and the server I / F unit 103 is created.
Is sent back to the sender via (S313). On the other hand, when the user designated by the received mail is registered in the own electronic mail server, the user information management table 106 is referred to and it is checked whether or not the user wants to separate the attached file (S304). ), If the separation is not desired, the normal storage process including steps S315 to S319 is performed.

In this normal saving process, the user information management table 106 is referred to, and the data size of the input electronic mail and the user-specific mail box 1 assigned to the user are set.
The sum with the current used capacity of 05 is calculated (S315). It is determined whether or not the calculated sum exceeds the maximum usable capacity assigned to the user shown in the user information management table 106 (S316). If it exceeds the limit, it is not saved in the user-specific mail box 105,
An error reply mail for notifying that it could not be received is created (S312) and sent back to the sender (S313).
On the other hand, if not exceeded, the values in the received mail number / attached file number column 204 and the mail BOX used / maximum capacity column 205 of the user information management table 106 are rewritten (S317). Then, the input electronic mail is stored in the corresponding one of the user-specific mail boxes 105 in the mail box 104 (S318).

If it is determined in step S304 that the user designated in the received mail wants to separate the attached file, the contents of the input electronic mail are referred to,
It is determined whether or not it has an attached text data part (S3
05), when it is determined that the attached text data portion is not included, the normal saving process (steps S315 to S3) is performed.
19) is carried out. On the other hand, for an input e-mail having attached text data, steps S306 to S311
The attached file separation process consisting of is executed.

In this attachment file separation processing, the attachment text data portion is separated from the body text data portion, the attachment text data portion is inversely converted, and the attachment file is restored (S306). The restored attachment file is stored in the attachment file BOX 107. At that time, the user information management table 106 is referred to, and the data size of the restored attachment file and the attachment by user assigned to the user. File box 108
The sum of the current used capacity and the current used capacity is calculated (S307). It is determined whether or not the calculated sum exceeds the maximum usable capacity assigned to the user (S308). If it exceeds the limit, the attached file is not saved in the BOX 107, only the attached file is discarded, and an error reply mail for notifying that only the text data portion of the main body is received is created (S312). Reply to (S
313). On the other hand, if it does not exceed, the respective values of the received mail number / attached file number column 204 and the mail BOX used / maximum capacity column 205 of the user information management table 106 are rewritten (S309). Then, the restored attachment file is saved in the corresponding attachment file BOX 108 for each user of the attachment file BOX 107 (S310).

Separated attachment file information indicating the attachment file name, the data size of the file, the storage location, etc. is added to the separated body text data portion so that the user can download the restored attachment file by FTP. (S311), normal save processing (steps S315 to S319) is performed as a mail addressed to the user.

It should be noted that, instead of adding the separated attachment file information to the body text data section, a new e-mail including such separated attachment file information and addressed to the user is created, and the separated body text data section is created. A normal saving process (step S31)
5 to S319) may be performed.

Next, how the electronic mail and the attachment file saved as described above are downloaded to the user will be described.

The electronic mail stored in the user-specific mail BOX 105 is transmitted to the user via the user I / F unit 101 and the user mail BOX 1 in the conventional manner in response to a download request of the received mail from the user.
It will be deleted from 05. Then, the user information management table 106 is rewritten.

When the user finds in the downloaded e-mail the separated attachment file information indicating that the attached file is separated and stored, the separated attachment file information indicates at any time. The attached file saved in the place is downloaded by FTP (user authentication is also performed as a matter of course), and deleted as necessary. Of course, if it is determined that downloading is not necessary, the attached file may be deleted without downloading. In the e-mail server, when there is a request to download the attached file, the target attached file is attached to each user of the attached file BOX 107.
It is read from X108 and transferred. In addition, according to the delete request, the target attachment file is attached to each user's attachment file BO
Delete from X108.

In this embodiment, FTP is used for downloading the attached file, but the protocol used is not particularly limited. For example, HTTP (Hy
pertext Transfer Protocol) may be used. However, the user authentication function is essential.

Also, when using HTTP and handling an attached file consisting of a still image or the like that the user can directly browse using a browser, a function of automatically generating a home page (html file) from those files May be included, in which case the URL of the home page
(Uniform Resource Locator) may be added to the e-mail addressed to the user. The user can check the contents of the attached file by accessing the URL.

(Second Embodiment) Next, a second embodiment will be described.

The configuration of the second embodiment is basically the first.
Since the configuration is the same as that of the first embodiment, the configuration of the first embodiment will be used in the description of the second embodiment.

FIG. 6 is a diagram showing a user information management table in the second embodiment. In the figure, the same parts as those of the user information management table in the first embodiment shown in FIG. 2 are designated by the same reference numerals, and the description thereof will be omitted.

In the second embodiment, instead of the attached file separation flag column 203 in the first embodiment,
An attachment file separation flag / non-separation size column 403 is provided in the user information management table. In this attachment file separation flag / non-separation size column 403, the non-separation mail data size is set in addition to the attachment file separation flag.

In the second embodiment, even when the user desires to separate the attached file in the electronic mail with the attached file, the data size of the electronic mail with the attached file is set to the attached file in the user information management table. Compared with the non-separated mail data size shown in the separation flag / non-separated size column 403, if the data size of the e-mail with the attached file does not exceed the non-separated mail data size, the attachment file is not separated. That is, in the first embodiment, when the user desires to separate the attached file from the e-mail with the attached file, the separation process of the attached file is performed regardless of the data size of the e-mail with the attached file. In the second embodiment, even if the user wants to separate the attached file, the separation process of the attached file is not performed when the data size of the email with the attached file does not exceed the non-separated mail data size. To

As a result, even if the user wishes to separate the attached file, if such separation is almost meaningless, the process of separating the attached file is not performed, and a wasteful processing load is eliminated.

In addition to the first and second embodiments, even if the user does not wish to separate the attached files, since the data size of the e-mail with the attached file is large, the e-mail for each user is left as it is. Box 105
When it is not possible to save the file in the file (usable capacity is exceeded), the attached file may be separated and only the body text data part with the reduced data size may be saved in the user-specific mail BOX 105. In this case, it is desirable to save the separated attachment file in the attachment file BOX 108 for each user if possible. In the example shown in FIG. 6, the usage amount of the user-specific mail BOX 105 of the user b is approaching the limit of the maximum usage capacity, and the arriving e-mail with attached file cannot be stored in the user-specific mail BOX 105 as it is. Therefore, even if the user b does not desire to separate the attached file, the attached file separation process is performed, only the body mail text portion is saved in the user-specific mail BOX 105, and the separated attachment file is saved in the user-specific attachment file BOX 108. .

(Other Embodiments) A storage medium storing a program code of software for realizing the functions of the above-described embodiments is supplied to a system or apparatus, and the computer (or CPU) of the system or apparatus is supplied.
Needless to say, the present invention can also be achieved by reading and executing the program code stored in the storage medium by the (or MPU).

In this case, the program code itself read from the storage medium realizes the function of each of the above-described embodiments, and the storage medium storing the program code constitutes the present invention. .

As a storage medium for supplying the program code, for example, a floppy (registered trademark) disk,
Hard disk, optical disk, magneto-optical disk, CD-
ROM, CD-R, magnetic tape, non-volatile memory card, ROM, etc. can be used.

Further, by executing the program code read by the computer, not only the functions of the respective embodiments described above are realized, but also the OS and the like running on the computer based on the instructions of the program code. Does some or all of the actual processing, and the functions of the above-described embodiments are realized by the processing,
Needless to say, it is included in the present invention.

Further, after the program code read from the storage medium is written in the memory provided in the function expansion board inserted into the computer or the function expansion unit connected to the computer, based on the instruction of the program code, It is needless to say that the present invention also includes a case where the CPU or the like included in the function expansion board or the function expansion unit performs a part or all of the actual processing and the processing realizes the functions of the above-described embodiments. Yes.

[0069]

As described in detail above, according to the present invention, an electronic mail server that receives an electronic mail with an attachment file stores the electronic mail separately into a text data portion and an attachment file. In this way, when an overflow that exceeds the e-mail storage capacity is likely to occur, even if it is not possible to save an attachment file that seems to have a large data size, do not discard only the body part with a relatively small data size. Can be processed.

When the user confirms the received e-mail,
It is possible to download only the body part of the email, and it is possible to quickly check the body part of all received emails without downloading an email with an attached file having a large data size as in the past. In addition, you can download attached files at a leisurely time or at a time when the telephone line usage fee is low, and you can delete files that you do not need to download without downloading them. This makes it possible to provide comfortable services to users.

Further, even when viewing an e-mail using a mobile phone or a personal digital assistant, only the text of the e-mail can be downloaded, and the attached file can be downloaded and viewed later using a high-performance personal computer or the like. it can.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a first embodiment of an electronic mail server according to the present invention.

FIG. 2 is a diagram showing the contents of a user information management table.

FIG. 3 is a flowchart (1/3) showing a procedure of processing executed by a mail processing unit.

FIG. 4 is a flowchart (2/3) showing a procedure of processing executed by a mail processing unit.

FIG. 5 is a flowchart (3/3) showing a procedure of processing executed by a mail processing unit.

FIG. 6 is a diagram showing a user information management table in the second embodiment.

FIG. 7 is a block diagram showing a configuration of a conventional electronic mail server that handles electronic mail.

[Explanation of symbols]

101 user I / F section (transfer means) 102 mail processing section (separation means, first storage means, second storage means) 103 server I / F section 104 mail box (first storage device) 105 mail for each user BOX 106 User information management table 107 Attachment file BOX (second storage device) 108 Attachment file BOX for each user 109 FTP server (transfer means)

Claims (21)

[Claims] 1. An e-mail server having first and second storage devices for receiving and storing an e-mail with an attached file addressed to a user belonging to the own device, wherein the attached file addressed to the user belonging to the own device. And a separation unit that separates the E-mail into a body part and an attachment file when the attached e-mail is received, and a separation unit that indicates that at least the separated attachment file exists in the body part separated by the separation unit. A first storage unit that stores attached file information in the first storage device, and an attached file separated by the separation unit;
Second storage means for storing in the storage device of the second storage device, and in the second storage device or in the text portion to which the separated attachment file information is added, stored in the first storage device according to a user's request. An electronic mail server, comprising: a transfer unit that reads out the stored attached file and transfers it to the user side. 2. The electronic mail server according to claim 1, wherein the separated attached file information includes at least one of a file name and location information regarding the attached file separated by the separating unit. 3. The discriminating means for discriminating whether or not there is a free space in the first storage device capable of storing the text portion to which the separated attachment file information is added. And a storage unit that stores the text portion to which the separated attached file information is added in the first storage device when the determination unit determines that there is a free space. The electronic mail server according to claim 2. 4. The discriminating means for discriminating whether or not there is a free space capable of storing the attached file in the second storage device, and the second storing means has a free space. The electronic mail server according to claim 1 or 2, further comprising a storage unit that stores the attached file in the second storage device when it is determined that the file exists. 5. The separating means, when receiving an electronic mail with an attached file addressed to a user belonging to the own apparatus, comparing means for comparing the data amount of the electronic mail with a predetermined value, and the result of the comparison, 5. The electronic device according to claim 1, further comprising means for separating the electronic mail into a body portion and an attached file when the data amount of the electronic mail exceeds a predetermined value. Mail server. 6. An e-mail server comprising first and second storage devices for receiving and storing e-mail with an attached file addressed to a user belonging to the own device, wherein the attached file addressed to a user belonging to the own device. When the attached e-mail is received, the e-mail is separated into a body part and an attachment file, and the attachment file separated by the separation means is the first file.
A first storing means for storing in the storage device, a first electronic mail consisting of a text portion separated by the separating means, and location information indicating a storage position of the attached file separated by the separating means, Second storage means for storing a second electronic mail having the same destination as the first electronic mail in the second storage device, and the second storage device in the first storage device in response to a user's request. An electronic mail server comprising: a stored attachment file or a transfer unit that reads the first and second mails stored in the second storage device and transfers the read mails to the user. 7. An e-mail storage / transfer method applied to an e-mail server that includes first and second storage devices and receives and stores e-mail with an attachment file addressed to a user who belongs to the self-device. When an e-mail with an attachment file addressed to a user who belongs to the device is received, a separation step of separating the e-mail into a body part and an attachment file, and at least the body part separated by the separation step are separated. A first storing step of storing separated attachment file information indicating that an attached file exists in the first storage device, and storing the attached file separated in the separation step in the second storage device And a second attachment step of adding the separated attachment file information stored in the first storage device according to a user's request. E-mail storage transfer method, characterized in that the body part, or by reading the second storage attachments in the storage device and a transfer step of transferring to the user side. 8. The transfer step, in response to a user request to transfer a body part of an electronic mail, stores a body part stored in the first storage device to which separate attachment file information is added. A first transfer step of reading and transferring to the user side; and a second storage when the user who has seen the separated attached file information transferred by the first transfer step requests to transfer the attached file. The electronic mail storage and transfer method according to claim 7, further comprising a second transfer step of reading an attached file stored in the device and transferring the attached file to the user side. 9. The electronic mail according to claim 7, wherein the separated attached file information includes at least one of a file name and location information regarding the attached file separated by the separating unit. Save transfer method. 10. The determination step of determining whether or not the first storage step determines whether or not there is a free space in the first storage device that can store the text portion to which the separated attachment file information is added. And a storing step of storing, in the first storage device, a text portion to which the separated attachment file information is added when it is determined in the determining step that there is a free space. The electronic mail storage transfer method according to claim 9. 11. The second storage step comprises a determination step of determining whether or not a free space capable of storing the attached file exists in the second storage device, and a free space determined by the determination step. The method according to any one of claims 8 to 9, further comprising a step of storing the attached file in the second storage device when it is determined that the attached file exists. 12. The separating step comprises a step of comparing a data amount of the electronic mail with a predetermined value when an electronic mail with an attached file addressed to a user belonging to the apparatus is received, and a result of the comparison, The electronic mail according to any one of claims 8 to 11, further comprising a step of separating the electronic mail into a body portion and an attached file when the data amount of the electronic mail exceeds a predetermined value. Mail storage and transfer method. 13. An e-mail storage / transfer method applied to an e-mail server that includes first and second storage devices and receives and stores e-mail with an attachment file addressed to a user who belongs to the self-device. When an e-mail with an attached file addressed to a user who belongs to the device is received, a separating step of separating the e-mail into a body portion and an attached file; and the attached file separated by the separating step in the first storage device. And a location information indicating a storage location of the attachment file separated by the separation step, and a first electronic mail including the text part separated by the separation step, A second storing step of storing a second email having the same destination as that of the second email in the second storage device; A transfer step of reading out the attached file stored in the first storage device or the first and second mails stored in the second storage device and transferring them to the user side in response to a request from the user. A method for storing and transferring electronic mail, comprising: 14. An electronic mail storage transfer method applied to an electronic mail server, comprising: a first storage device and a second storage device, for receiving and storing an electronic mail with an attached file addressed to a user who belongs to the device. And a separating step of separating the electronic mail into a body part and an attached file when the electronic mail storage / transfer method receives an electronic mail with an attached file addressed to a user who belongs to the device. A first storage step of storing at least the separated attachment file information indicating that the separated attachment file is present in the first storage device in the body portion separated by the separation step, and A second storing step of storing the attached file separated by the separating step in the second storage device; In response to a request, a transfer for reading out the text part stored in the first storage device to which the separated attachment file information is added or the attachment file stored in the second storage device and transferring the read file to the user side. A program having steps. 15. The transfer step includes, in response to a user request to transfer a body part of an electronic mail, a body part to which separate attachment file information is added, which is stored in the first storage device. A first transfer step of reading and transferring to the user side; and a second storage when the user who has seen the separated attached file information transferred by the first transfer step requests to transfer the attached file. The second transfer step of reading an attached file stored in a device and transferring the read file to the user side, the program according to claim 14. 16. The separating step, when receiving an email with an attached file addressed to a user who belongs to the own apparatus, a comparing step of comparing a data amount of the email with a predetermined value, and a result of the comparison, 16. The program according to claim 14, further comprising a step of separating the electronic mail into a body portion and an attached file when the data amount of the electronic mail exceeds a predetermined value. 17. An electronic mail storage transfer method applied to an electronic mail server, comprising: a first storage device and a second storage device, for receiving and storing an electronic mail with an attachment file addressed to a user belonging to the own device. And a separating step of separating the electronic mail into a body part and an attached file when the electronic mail storage / transfer method receives an electronic mail with an attached file addressed to a user who belongs to the device. A first storing step of storing the attachment file separated in the separating step in the first storage device, a first electronic mail including a text portion separated in the separating step, and a separating step in the separating step It consists of location information indicating the storage location of the attached file, and has the same destination as the first e-mail. A second storing step of storing the second electronic mail in the second storage device, and an attachment file stored in the first storage device or the second storage device according to a user's request. And a transfer step of reading the first and second mails stored in the device and transferring the read mails to the user side. 18. An electronic mail storage transfer method as a program, which comprises a first storage device and a second storage device and is applied to an electronic mail server for receiving and storing an electronic mail with an attached file addressed to a user belonging to the own device as a program. In a stored computer-readable storage medium, when the electronic mail storage / transfer method receives an electronic mail with an attached file addressed to a user belonging to the device, the electronic mail is separated into a body part and an attached file. A first storing step in which at least the separated attachment file information indicating that the separated attachment file exists is stored in the first storage device in the text part separated by the separation step. And a second step of storing the attached file separated by the separation step in the second storage device. According to a storing step and a user's request, the text part to which the separated attachment file information is stored, which is stored in the first storage device, or the attachment file stored in the second storage device, is read out and read. And a transfer step of transferring to the user side. 19. The transfer step, in response to a user request to transfer a body part of an electronic mail, stores a body part stored in the first storage device, to which separate attachment file information is added. A first transfer step of reading and transferring to the user side; and a second storage when the user who has seen the separated attached file information transferred by the first transfer step requests to transfer the attached file. The storage medium according to claim 18, further comprising a second transfer step of reading an attached file stored in the device and transferring the attached file to the user side. 20. The separating step comprises a step of comparing the amount of data of the electronic mail with a predetermined value when an electronic mail with an attached file addressed to a user belonging to the own device is received, and a result of the comparison, 20. The storage medium according to claim 18, further comprising a step of separating the electronic mail into a body portion and an attached file when the data amount of the electronic mail exceeds a predetermined value. 21. As a program, an e-mail saving / transferring method applied to an e-mail server that includes first and second storage devices and receives and saves an e-mail with an attached file addressed to a user belonging to the device. In a stored computer-readable storage medium, when the electronic mail storage / transfer method receives an electronic mail with an attached file addressed to a user who belongs to the device, the electronic mail is separated into a body part and an attached file. A first storing step of storing the attachment file separated by the separating step in the first storage device; a first electronic mail including a text part separated by the separating step; The location information indicating the storage location of the attached file separated by the separation step is included. A second storage step of storing a second electronic mail having the same destination as the mail in the second storage device, and an attachment file stored in the first storage device in response to a user request. Or a transfer step of reading the first and second mails stored in the second storage device and transferring them to the user side.