JP2001237873A - Electronic mail system and electronic mail communication method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mail server system that can deliver a message to a terminal user by using any substitute method at interruption of power to a reception terminal or even in the case that a radio wave does not reach the user. SOLUTION: At least any of a mail address of a transfer destination, a contact telephone number, a contact facsimile number, and a pocket beeper number is registered in advance in a database 24 in preparation for the case that mail transmission to a mobile terminal 214 is not successful. The electronic mail system is provided with a voice synthesis section 25 that converts contents of a mail into a voice, a facsimile transmission section 26 that visualizes the contents of the mail into an image and transmits the image, and a dial signal generating section 27 that converts the contents of the mail into a dial signal. In the case that a terminal to receive a mail cannot receive the mail, message of the mail is transmitted to a substitute communication unit depending on the registration number in the database 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an electronic mail system comprising a portable terminal device and a mail server, and an electronic mail communication method thereof.

[0002]

2. Description of the Related Art In recent years, various portable terminals have been commercialized, and mail server systems for exchanging mail with the terminals have been increasing. FIG. 7 shows a configuration of a conventional mail server. 1, reference numeral 1 denotes a CPU such as a microprocessor.
(Central processing unit), which controls the entire mail server, outputs various data signals and control signals in accordance with a control program stored in a ROM / RAM 2 described later, and controls the entire apparatus. I have. 2 is ROM /
A RAM in which a control program and the like are stored;
It is used as a work area for the PU 1 and temporarily stores various control data. Reference numeral 3 denotes an auxiliary storage unit such as a hard disk, which is a memory for storing various information and the like, and is a mailbox for temporarily storing transmitted mails and for storing received mails.

An auxiliary storage unit 4 such as a hard disk is a memory for storing various information and the like, and is a database relating to user information such as an address book and a transfer destination address. Reference numeral 5 denotes a network interface for connecting the mail server to a network such as a LAN (local area network). 6 uses this mail server as a general public network such as a telephone or I
A public line communication unit for connecting to a communication line such as SDN (Integrated Services Digital Communication Network). 7 is LAN
8 is a general public network such as a telephone or ISDN
And 9 is a system bus of the mail server device.

[0004] The operation of the conventional mail server device configured as described above will be described.

When a mail transmission operation is performed from a terminal (not shown) connected to the LAN 7, the mail is temporarily stored in the mailbox 3 via the network interface 5.

Then, the destination of the mail is read, and the actual destination is determined from the destination information in the database 4.
If the destination is connected on the same LAN 7,
The mail is read from the mailbox 3 and transmitted to the LAN 7 via the network interface 5. If the destination of the mail is an external address registered in advance, the mail is connected to a general telephone network or ISDN network 8 via the public line communication unit 6, and the mail is read from the mailbox 3 to read the general telephone network. Or on the ISDN 8.

When a mail is received from a terminal (not shown) connected to the LAN 7, the general telephone network or the ISDN 8 via the network interface 5 or the public line communication unit 6, the message is temporarily stored in the mailbox 3. accumulate.

After that, LAN7, general telephone network, ISDN
When an e-mail addressed to the user is read from a terminal connected to the network 8, authentication is performed based on the user information in the database 4, an e-mail addressed to the user is read from the corresponding mailbox 3, and the corresponding user is read. Send an email to the recipient.

[0009]

However, in the above-described conventional mail server system, when the mail is transmitted to the destination terminal, the power of the terminal of the transmission destination (reception side) is not turned on or the radio wave does not reach. If it is not possible to receive it because it is not available, the mail server can only wait for a certain period of time and resend the mail, and the user will not reliably receive the urgent mail even if it is urgent. There were issues to be solved.

[0010] An object of the present invention is to solve the above-mentioned problems and to provide a user of a terminal with some alternative means even if the power of the receiving terminal is not turned on or radio waves do not reach. An object of the present invention is to provide an e-mail system and an e-mail communication method capable of delivering a message.

[0011]

According to an aspect of the present invention, there is provided an electronic mail system comprising a plurality of terminals and a mail server, wherein: a database for pre-registering a transfer destination mail address; When an e-mail is sent from a mail server to any terminal and automatic reception is performed at the terminal, if the terminal cannot be connected, the e-mail is forwarded to another e-mail address preset in the database. It is characterized by having a transfer means.

[0012] In order to achieve the above object, the invention of claim 2 provides an electronic mail system comprising a plurality of terminals and a mail server, in which a database for registering telephone numbers to be contacted in advance and the contents of messages are converted into voice. When an e-mail is sent from a mail server to any of the terminals, and the terminal performs automatic reception,
When the terminal cannot be connected to the terminal, it has a transfer means for calling a telephone number preset in the database and transferring the contents of the message by voice using the voice synthesizer. .

[0013] In order to achieve the above object, a third aspect of the present invention provides an electronic mail system comprising a plurality of terminals and a mail server, wherein a database for registering a facsimile number to be contacted in advance and the contents of the message are transmitted as images. If a facsimile transmission device and a mail server send mail to any terminal and perform automatic reception at the terminal, if the terminal cannot be connected,
A transfer unit configured to connect to a facsimile number preset in the database and transfer the contents of a message as an image using the facsimile transmission device.

According to a fourth aspect of the present invention, there is provided an electronic mail system comprising a plurality of terminals and a mail server, wherein a database for registering a pager number to be contacted in advance and a content of the message are dialed. When a mail is sent from a mail server to one of the terminals, and automatic reception is performed at the terminal, if the terminal cannot be connected to the dial signal generation device that converts the data to the terminal, the database is set in advance in the database. And a transfer means for transferring the contents of the message to the pager by a dial signal using the dial signal generator.

Here, the terminal may be a portable terminal.

According to a sixth aspect of the present invention, there is provided a communication method for an electronic mail system comprising a plurality of terminals and a mail server, wherein a registration step of registering a transfer destination mail address in a database in advance; When an e-mail is sent from a mail server to any terminal and automatic reception is performed at the terminal, if the terminal cannot be connected, the e-mail is forwarded to another e-mail address preset in the database. The transfer step is performed.

According to a seventh aspect of the present invention, there is provided a communication method for an electronic mail system comprising a plurality of terminals and a mail server, comprising: a registration step of registering a telephone number to be contacted in a database in advance; A voice synthesis step of converting the content of the text into voice, and sending an email from the mail server to any terminal,
If the terminal cannot connect to the terminal when performing automatic reception, a telephone number set in the database is called, and the contents of the message are transferred by voice using the voice synthesis step. The transfer step is performed.

In order to achieve the above object, the invention according to claim 8 is a communication method of an electronic mail system comprising a plurality of terminals and a mail server, wherein a registration step of pre-registering a facsimile number to be contacted in a database;
A facsimile transmission step of transmitting the content of the message as an image, and sending an e-mail from the mail server to any of the terminals, and performing automatic reception at the terminal. The method further comprises a transfer step of connecting to a facsimile number preset in a database and transferring the contents of the message as an image using the facsimile transmission step.

In order to achieve the above object, the invention according to claim 9 is a registration step of registering a pager number to be contacted in a database in advance in an electronic mail system comprising a plurality of terminals and a mail server; A dial signal generating step of converting the data into a dial signal, and transmitting an e-mail from the mail server to any of the terminals, and performing automatic reception at the terminal. And a transfer step of transferring the contents of the message to the pager by a dial signal using the dial signal generating step.

(Operation) In the present invention, (1) a function of registering a mail address of a transfer destination in a case where mail transmission to a terminal is not successful in a database is provided, and (2) mail transmission to a terminal is performed. A function for registering a telephone number to be contacted in the case of failure in the database and a voice synthesizing device; and (3) a function for registering a facsimile number to be contacted in the case where mail transmission to the terminal is not successful in the database and a facsimile. (4)
Furthermore, by providing a function of registering a pager number to be contacted when the mail transmission to the terminal is not successful in the database and a dial signal generator, even if the terminal to be received cannot receive the message. This makes it possible to send a mail message to an alternative receiving means, which is a convenient electronic mail system for the user.

[0021]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a system configuration example of a mail server according to an embodiment of the present invention. In the figure,
Reference numeral 21 denotes a CPU such as a microprocessor, which controls the entire server, and outputs various data signals and control signals in accordance with a control program stored in a ROM / RAM 22, which will be described later, to control the entire apparatus. I have.

A ROM / RAM 22 stores a control program and the like, is used as a work area of the CPU 21, and temporarily stores various control data. 2
Reference numeral 3 denotes an auxiliary storage unit such as a hard disk, which is a memory for storing various information and the like, and is a mailbox for temporarily storing transmitted mails and for storing received mails. Reference numeral 24 denotes an auxiliary storage unit such as a hard disk, similar to 23, which is a memory for storing various information and the like, and is a database relating to user information such as an address book and a transfer destination address.

Reference numeral 25 denotes a voice synthesizing unit for synthesizing voice according to a given message. A facsimile transmission unit 26 generates a facsimile image from a given message and transmits the image to the facsimile. Reference numeral 27 denotes a dial signal generator that generates a dial signal such as a push button tone according to a given message.

Reference numeral 28 denotes a network interface for connecting the mail server to a network 211 such as a LAN. Reference numeral 29 denotes a public line communication unit for connecting the mail server to a general public network such as a telephone or a communication line (WAN: wide area network) 212 such as ISDN. 210 is a system bus of the mail server device.

Reference numeral 211 denotes a network such as a LAN;
Is a general public network such as a telephone or a telephone line (WA
N). Reference numeral 213 denotes a terminal connected to the LAN 211 (for example, a personal computer: a personal computer), and reference numeral 214 denotes a terminal connected to the WAN 212 (for example, a mobile terminal).

The operation of the mail server device according to the present invention configured as described above will be described with reference to the flowcharts of FIGS.

(First Embodiment) FIG. 2 shows an operation procedure of a first embodiment of the present invention. In the present embodiment, the mail address of the transfer destination when the mail transmission to the terminal is not successful is registered in the database 24 in advance.

The personal computer 2 connected to the LAN 211
When an e-mail is transmitted to mobile terminal 214 from step 13 (step S1), CPU 21 of the e-mail server receives the e-mail via network interface 28 and temporarily stores it in mailbox 23 (step S1).
2).

Next, the CPU 21 of the mail server accesses the information in the database 24, and
Analyze the information about 14 (step S3).

Then, based on the analysis result, the CPU 21 connects to the portable terminal 214 on the WAN 212 by using the corresponding telephone number using the public line communication unit 29 (step S4). When this connection is completed normally (step S
5) The mail to be transmitted is read from the mailbox 23, and the mail is transmitted to the portable terminal 214 via the public line communication unit 29 (step S6).

However, when trying to connect to the portable terminal 214 through the public line communication unit 29, the portable terminal 214
If the power supply of the mobile terminal 214 is turned off or if the mobile terminal 214 is in a place where radio waves cannot be received, the connection cannot be made normally and mail cannot be transmitted. Therefore, if the connection is not normally established, the mail address of the transfer destination registered in the database 24 is read (step S).
7) The error message indicating that the mail could not be transmitted to the portable terminal 214 and the contents of the original mail are transferred to the transfer destination portable terminal 215 (step S8).

When the transmission of the mail is completed, the communication is terminated by instructing the public line communication unit 29 to disconnect the line (step S9).

(Second Embodiment) FIG. 3 shows an operation procedure of a second embodiment of the present invention. In the present embodiment, a telephone number to be contacted when mail transmission to the terminal is not successful is registered in the database 24 in advance. Note that the same step numbers are used for procedures having the same contents as in FIG.

Personal computer 2 connected to LAN 211
When an e-mail is transmitted to mobile terminal 214 from step 13 (step S1), CPU 21 of the e-mail server receives the e-mail via network interface 28 and temporarily stores it in mailbox 23 (step S1).
2).

Next, the CPU 21 of the mail server accesses the information in the database 24, and
Analyze the information about 14 (step S3).

Then, based on the analysis result, the CPU 21 connects to the portable terminal 214 on the WAN 212 by using the corresponding telephone number using the public line communication unit 29 (step S4). When this connection is completed normally (step S
6) The mail to be transmitted is read from the mailbox 23, and the mail is transmitted to the portable terminal 214 via the public line communication unit 29 (step S6).

However, when trying to connect to the portable terminal 214 via the public line communication unit 29, the portable terminal 214
If the power supply of the mobile terminal 214 is turned off or if the mobile terminal 214 is in a place where radio waves cannot be received, the connection cannot be made normally and mail cannot be transmitted. Therefore, if the connection cannot be made normally, the telephone number of the transfer destination registered in the database 24 is read (step S10), and a call is made using the public line communication unit 29 (step S1).
1) When the call is connected to the telephone 216 of the transfer destination (step S1)
2) An error message indicating that the mail could not be transmitted to the portable terminal 214 and the contents of the mail to be transmitted are passed to the voice synthesizing unit 25 to synthesize voice (step S13).
The contents of the message and the mail are transmitted to the telephone 216 of the other party via the public line communication unit 29 by the synthesized voice (step S14).

When the transmission of the mail or the transmission of the voice message is completed, the public line communication unit 29 is instructed to disconnect the line and the communication is terminated (step S9).

(Third Embodiment) FIG. 4 shows an operation procedure of a third embodiment of the present invention. In the present embodiment, a facsimile number to be notified when mail transmission to the terminal is not successful is registered in the database 24 in advance. Note that the same step numbers are used for procedures having the same contents as in FIG.

The personal computer 2 connected to the LAN 211
When an e-mail is transmitted to mobile terminal 214 from step 13 (step S1), CPU 21 of the e-mail server receives the e-mail via network interface 28 and temporarily stores it in mailbox 23 (step S1).
2).

Next, the CPU 21 of the mail server accesses the information in the database 24 and
Analyze the information about 14 (step S3).

Based on the analysis result, the CPU 21 connects to the portable terminal 214 on the WAN 212 by using the corresponding telephone number using the public line communication unit 29 (step S4). When this connection is completed normally (step S
5) The mail to be transmitted is read from the mailbox 23, and the mail is transmitted to the portable terminal 214 via the public line communication unit 29 (step S7).

However, when trying to connect to the portable terminal 214 via the public line communication unit 29, the portable terminal 214
If the power supply of the mobile terminal 214 is turned off or if the mobile terminal 214 is in a place where radio waves cannot be received, the connection cannot be made normally and mail cannot be transmitted. Therefore, when the connection is not normally established, the number of the facsimile of the transfer destination registered in the database 24 is read (step S).
20), an error message indicating that the mail could not be transmitted to the transfer destination portable terminal 214 and the contents of the mail to be transmitted are passed to the facsimile transmission unit 26 to create a facsimile image (step S21), and The connection is made to the facsimile machine 217 of the transfer destination using the line communication unit 29 (step S22). Facsimile machine 21 of transfer destination
7 (step S23), the facsimile transmission unit 26 transmits the created image to the transfer destination facsimile apparatus 217 using a facsimile communication protocol (step S24).

When the transmission of the mail is completed or the transmission to the facsimile is completed, the public line communication unit 29 is instructed to disconnect the line and the communication is terminated (step S).
9).

(Fourth Embodiment) FIG. 5 shows an operation procedure of a fourth embodiment of the present invention. In the present embodiment, a pager number to be contacted when mail transmission to the terminal is not successful is registered in the database 24 in advance. Note that the same step numbers are used for procedures having the same contents as in FIG.

The personal computer 2 connected to the LAN 211
When an e-mail is transmitted to mobile terminal 214 from step 13 (step S1), CPU 21 of the e-mail server receives the e-mail via network interface 28 and temporarily stores it in mailbox 23 (step S1).
2).

Next, the CPU 21 of the mail server accesses the information in the database 24 and
Analyze the information about 14 (step S3).

Then, based on the analysis result, the CPU 21 connects to the portable terminal 214 on the WAN 212 using the corresponding telephone number using the public line communication unit 29 (step S4). When this connection is completed normally (step S
5) The mail to be transmitted is read from the mailbox 23, and the mail is transmitted to the portable terminal 214 via the public line communication unit 29 (step S7).

However, when trying to connect to the portable terminal 214 via the public line communication section 29, the portable terminal 214
If the power supply of the mobile terminal 214 is turned off or if the mobile terminal 214 is in a place where radio waves cannot be received, the connection cannot be made normally and mail cannot be transmitted. Therefore, if the connection cannot be normally made, the pager number of the transfer destination registered in the database 24 is read (step S).
30). Next, an error message indicating that the mail could not be transmitted to the transfer destination portable terminal 214 and the contents of the mail to be transmitted are passed to the dial signal generator 27 (step S31). Next, a call is made to the transfer destination pager (pager) 218 using the public line communication unit 29 (step S32), and after being connected to the transfer destination pager 218 (step S33), the dial signal generation unit 27
Pager 218 at the transfer destination
(Step S34).

When the transmission of the mail or the transmission of the dial signal is completed, the public line communication unit 29 is instructed to disconnect the line and the communication is terminated (step S9).

(Fifth Embodiment) As a fifth embodiment of the present invention, the above-described first to fourth embodiments may be combined. For example, a plurality of e-mail addresses and telephone numbers of alternative means 215 to 218 to be transferred when a connection cannot be normally made to a certain mobile terminal 214 can be prioritized in accordance with a user's instruction and registered in the database 24 in advance.
If the mobile terminal 214 cannot be normally connected, the mobile terminal 214 attempts to connect to the first alternative according to the priority, and if the connection fails, sequentially attempts to connect to the alternative of the next priority. The content of the mail may be transmitted to such an alternative means.

FIG. 6 is a flowchart showing an example of the operation procedure of the fifth embodiment. Here, S1 to S32 represent steps S1 to S32 described in the above embodiment. I indicates a priority number in the database 24.

First, a plurality of mail addresses, telephone numbers, and the like of the alternative means 215 to 218 to be transferred when a connection cannot be normally made to a certain portable terminal 214 are prioritized in accordance with a user's instruction and registered in the database 24 in advance (step S41). ).

The processes of steps S1 to S4 are executed in response to the transmission of the mail from the personal computer 213 (step S42). Here, when the connection to the portable terminal 214 is normally completed (step S43), a mail is transmitted from the mailbox 23 to the portable terminal 214 (step S4).
4). When the transmission of the mail is completed, the public line communication unit 29
, And terminates the communication (step S45).

However, when trying to connect to the portable terminal 214 via the public line communication unit 29, the portable terminal 214
If the power supply of the mobile terminal 214 is turned off or if the mobile terminal 214 is in a place where radio waves cannot be received, the connection cannot be made normally and mail cannot be transmitted. Therefore, when the connection is not normally established, the type of the transfer destination having the first priority of the transfer destination registered in the database 24 is read (step S48), and the type is determined (step S48).
49).

If the determined type is, for example, a mail address, the above-described steps S7 and S8 are executed to transfer the mail to the transfer destination portable terminal 215 (step S5).
0, S52), when the transfer is completed, disconnection of the line is instructed via the public line communication unit 29, and the communication is terminated (step S45).

Similarly, when the determined type is a telephone number, the processing of the above-described steps S10, S11, S13, and S14 is performed, and the contents of the mail are notified by voice to the transfer destination telephone 216 (step S50, S52) If the determined type is a facsimile number, the above-described step S2 is performed.
0, S21, S22, and S24 are executed to transfer the contents of the mail to the transfer destination facsimile machine 217 as an image (steps S56 and S58). If the determined type is a pager number, the above-described steps S30 and S31 are performed. , S3
2. The process of S34 is executed to notify the contents of the mail to the pager 218 of the transfer destination by a dial signal (step S34).
59, S61), when the transfer is completed, the communication is terminated by instructing the disconnection of the line via the public line communication unit 29 (step S45).

However, when the normal connection to the transfer destination is not successful (steps S51, S54, S57, S6)
0), the type of the transfer destination having the next priority to the transfer destination registered in the database 24 is read (step S6).
2, S46, S47, S48), and the type is determined (step S49). After that, the above processing is repeated. (Other Embodiments) Even if the present invention is applied to a system including a plurality of devices (for example, a host computer, an interface device, a reader, a printer, and the like), an apparatus including one device (for example, Copy machine, facsimile machine, etc.).

An object of the present invention is to provide a recording medium (storage medium) recording software program codes for realizing the functions of the above-described embodiments to a system or an apparatus, and to provide a computer for the system or the apparatus. Needless to say, the present invention is also achieved when the CPU (or the CPU or the MPU) reads out and executes the program code stored in the recording medium.

In this case, the program code itself read from the recording medium realizes the functions of the above-described embodiment, and the recording medium on which the program code is recorded constitutes the present invention.

Examples of a recording medium for recording the program code and variable data such as a table include a floppy disk (FD), hard disk, optical disk, magneto-optical disk, CD-ROM, CD-R, magnetic tape, A nonvolatile memory card (IC memory card), a ROM, or the like can be used.

When the computer executes the readout program code, not only the functions of the above-described embodiment are realized, but also the operating system (OS) running on the computer based on the instruction of the program code. It goes without saying that an operating system) may perform some or all of the actual processing, and the processing may realize the functions of the above-described embodiments.

[0063]

As described above, according to the present invention, by enabling notification to the alternative means, the terminal can receive the signal when the power of the receiving terminal is not turned on or when the radio wave does not reach. Even when the terminal cannot be used, it is possible to provide some information to the recipient of the terminal, and it is possible to provide an e-mail system which can sufficiently cope with an emergency.

Further, according to the present invention, since various alternative means can be set in the database, it is possible to change the transfer destination at any time according to the environment such as the place and the area of the receiver. It is also possible to take measures according to the work of

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration example of an electronic mail system according to each embodiment of the present invention.

FIG. 2 is a flowchart showing an operation procedure according to the first embodiment of the present invention.

FIG. 3 is a flowchart illustrating an operation procedure according to the second embodiment of the present invention.

FIG. 4 is a flowchart illustrating an operation procedure according to a third embodiment of the present invention.

FIG. 5 is a flowchart illustrating an operation procedure according to a fourth embodiment of the present invention.

FIG. 6 is a flowchart illustrating an operation procedure according to a fifth embodiment of the present invention.

FIG. 7 is a block diagram showing a configuration of an electronic mail system in a conventional example.

[Explanation of symbols]

 1 CPU 2 ROM / RAM 3 Mailbox 4 Database 5 Network interface 6 Public line communication unit 7 LAN 8 Public line 9 System bus 21 CPU 22 ROM / RAM 23 Mailbox 24 Database 25 Voice synthesis unit 26 Facsimile transmission unit 27 Dial signal generation Unit 28 network interface 29 public line communication unit 210 system bus 211 LAN 212 WAN 213 personal computer 214, 215 portable terminal 216 telephone 217 facsimile machine 218 pager

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Claims (10)

[Claims] 1. An electronic mail system comprising a plurality of terminals and a mail server, a database for registering mail addresses of transfer destinations in advance, a mail being transmitted from the mail server to any one of the terminals, and An electronic mail system comprising a transfer means for transferring to a different mail address preset in the database when connection to the terminal cannot be made during automatic reception. 2. An electronic mail system comprising a plurality of terminals and a mail server, wherein a database for registering telephone numbers to be contacted in advance, a voice synthesizer for converting the contents of a message into voice, When sending an e-mail to the terminal and performing automatic reception at the terminal, if the terminal cannot be connected, a call is made to a telephone number preset in the database, and the voice synthesizer is activated. An electronic mail system comprising a transfer unit for transferring the contents of a message by voice using the electronic mail system. 3. An electronic mail system comprising a plurality of terminals and a mail server, wherein a database for registering a facsimile number to be contacted in advance, a facsimile transmission device for transmitting the contents of a message as an image, When sending an e-mail to the terminal and performing automatic reception at the terminal, if the terminal cannot be connected, connect to a facsimile number preset in the database and connect the facsimile transmission device. An electronic mail system comprising a transfer means for transferring the contents of a message as an image by using the transfer means. 4. An electronic mail system comprising a plurality of terminals and a mail server, wherein a database for registering a pager number to be contacted in advance, a dial signal generator for converting the contents of a message into a dial signal, and a mail server. When an e-mail is sent to one of the terminals and automatic reception is performed by the terminal, if the terminal cannot be connected, a connection is made to a pager number preset in the database, and the dial signal An e-mail system comprising a transfer means for transferring the contents of a message to a pager by a dial signal using a generator. 5. The electronic mail system according to claim 1, wherein the terminal is a portable terminal. 6. A communication method for an electronic mail system comprising a plurality of terminals and a mail server, comprising: a registration step of registering a transfer destination mail address in a database in advance; Sending, when performing automatic reception at the terminal, if the connection to the terminal is not possible, the electronic mail having a transfer step of transferring to another mail address preset in the database. Communication method. 7. A communication method for an electronic mail system comprising a plurality of terminals and a mail server, comprising: a registration step of registering a telephone number to be contacted in a database in advance; a voice synthesis step of converting the contents of a message into voice; When an e-mail is sent from a mail server to any terminal and automatic reception is performed at the terminal, if the terminal cannot be connected, a call is made to a telephone number preset in the database. Transferring the contents of the message by voice using the voice synthesis step. 8. A communication method for an electronic mail system comprising a plurality of terminals and a mail server, comprising: a registration step of registering a facsimile number to be contacted in a database in advance; a facsimile transmission step of transmitting the contents of a message as an image; A mail is sent from the mail server to any terminal, and when automatic reception is performed by the terminal, if the terminal cannot be connected, a connection is made to a facsimile number preset in the database. An e-mail communication method, further comprising a transfer step of transferring the contents of a message as an image using the facsimile transmission step. 9. An electronic mail system comprising a plurality of terminals and a mail server, a registration step of registering a pager number to be contacted in a database in advance, a dial signal generation step of converting the contents of a message into a dial signal, When an e-mail is sent from the mail server to any terminal and automatic reception is performed by the terminal, if the terminal cannot be connected, the terminal connects to the pager number preset in the database. An e-mail communication method, further comprising the step of transferring the contents of a message to a pager by a dial signal using the dial signal generating step. 10. The electronic mail communication method according to claim 5, wherein the terminal is a portable terminal.