JP2872016B2 - Email system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an e-mail system, and more particularly to an operation when a user of an e-mail client system performs operations such as search, reference, deletion, and transmission of e-mail on an e-mail server system. Regarding attribute management method.

[0002]

2. Description of the Related Art The technique disclosed in Japanese Patent Application Laid-Open No. 2-302144 is to control an e-mail box to be used exclusively for each user and to guarantee the contents of e-mail in the e-mail box. is there.

[0003]

SUMMARY OF THE INVENTION
In the technology of JP-A-302144, only a method of managing user rights for an e-mail box is realized, and a method for managing individual operations such as search, reference, deletion, and transmission of an e-mail is disclosed. Not realized.

[0004] In other words, only by managing the user right to the e-mail box as in the technique of Japanese Patent Application Laid-Open No. 2-302144, one e-mail having different operation restrictions can be transmitted.
There is a problem in that it is not possible to perform flexible management of e-mail such that the e-mail is stored in one e-mail box and managed so as to correspond only to individual operation restrictions.

In order to solve this problem, a method of preparing an e-mail box for each operation restriction can be considered. However, this method requires a large amount of resources and complicates the management of each mailbox. Not practical.

[0006]

Means for Solving the Problems] e-mail system of the first invention, the e-mail client is either one of the host computer and the terminal, which is one either on other host computers and terminals Electronic mail
<br/> search for e-mail in the e-mail file Rusaba, reference, deletion, and an electronic mail system for operations such as transmission, the e-mail server is the <br/> email client which receives an operation command request including a pressurized et transmitting communication protocol, a communication control unit for transmitting the operation result of the operation command to the e-mail client, the communication proto <br/> Col of the operation command request analyzed, and the operation command analyzing unit for taking out an operation request for the electronic mail, the operation requests extracted by the operation command analyzing unit, for each user of the e-mail client pre-stored of <br/> the definition file of the operation attribute to the e-mail, and determining operation check unit whether or not consistent, judgment formation by the operation check unit There If error, transmits the operation command request
A command response assembly to send an error command including the communication protocol indicating the e-mail click Ryan Toee error, if the determination result is an error by the operation check unit, in accordance with the operation command request received, e-mail files in And an operation processing unit for operating the e-mail.

A second e-mail system, in the first e-mail system, related to e-mail in the e-mail file on the email server, define file
User of the e-mail client stored in advance in
Against operational attributes of each, by placing the operation attribute change command from either one of the operation terminal and the system console definition file processing to implement either one process of whether to add or delete the operation attribute Including parts.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings.

Referring to FIG. 1, an e-mail system according to a first embodiment of the present invention includes an e-mail control device 11 in a host computer 10 as an e-mail server. A communication control unit 12 that receives an operation command request including a communication protocol transmitted from the terminal device A, which is an e-mail client connected via the line 30, and transmits an operation result of the operation command to the terminal device A; The operation command analysis unit 13 analyzes the protocol of the operation command request and extracts the operation request. The operation request extracted by the operation command analysis unit 13 includes the operation attribute for the electronic mail defined in the definition file 17 in advance. An operation check unit 15 for determining whether or not there is a contradiction, If the determination result is incorrect, the command response assembling unit 14 that transmits an error command including a communication protocol indicating the error to the terminal device A that transmitted the operation command request, and the determination result by the operation check unit 15 are incorrect. If there is no operation command request, the operation processing unit 16 operates the e-mail in the e-mail file M180 in accordance with the received operation command request.

A host computer 10 and a line 3
The terminal device X and the terminal device Y connected to the terminal 1 and the line 32 are both electronic mail systems that transmit and receive electronic mail.

FIG. 2 shows an example of an operation attribute of an electronic mail defined in the definition file 17. A deletion operation for an e-mail is defined as a prohibited matter in the e-mail server, and the sender name of the operation target e-mail is set to the terminal device X.
User and the email file to be operated is M1
80, and the definition that the user of the e-mail client using the e-mail system is the user of the terminal device A. As for the definition element in the symbol ｛｝, a plurality of definition elements can be described, and the target of each definition element is defined in the symbol (), and the target definition in the parentheses () can be defined as a plurality of elements. For example, although it is possible to define using 、, this embodiment shows a case where there is one for each defining element.

FIG. 3 shows an example in which the contents of the definition example of the definition file 17 shown in FIG. 2 are expanded in a control table on the memory. First, the user list table stores the users of a plurality of e-mail clients using the e-mail system. This is a control table that manages user information, including user name definition information and information such as a pointer that points to the address of the user table. The user table contains definition information about operations and information such as a pointer that points to the address of the mail file table. Is included,
The mail file table contains the definition information of the e-mail file name that is the target of the defined operation and information such as a pointer that points to the address of the message table. The message table contains the e-mail that is the target of the defined operation. Contains information about

Next, the operation of the first embodiment of the present invention will be described with reference to FIGS. 1, 2, 3 and 4.

In the host computer 10 which is an electronic mail server, an electronic mail file M180 stores an electronic mail of the terminal device A which is an electronic mail client, and stores an electronic mail transmitted from a user of the terminal devices X and Y. It is stored via the e-mail transmission / reception processing unit 20.

When the user of the terminal device A, which is an e-mail client, refers to the e-mail in the e-mail file M180, the user uses the terminal device A to input the user name, the operation command identifier, and the condition of the e-mail to be referred. For example, as a communication data, an operation parameter indicating an e-mail list arriving after the previously referred e-mail or an e-mail list received from a certain user is assembled as communication data, and further, network information such as a self or partner address is included in the communication data. Then, a communication frame is added and transmitted to the line 30.

Communication control unit 12 of host computer 10
Receives the communication frame and passes the communication data from which the network information has been removed to the operation command analysis unit 13 (step 121).

When the received command data is decomposed, the operation command analysis unit 13 extracts the user name, the operation command identifier, and the operation parameter, and passes them to the operation check unit 15 (step 131).

The operation check unit 15 searches the definition file 17 based on the user name, operation command identifier, and operation parameters received in step 131.

First, the user list table in the definition file 17 is searched with the user name obtained in step 131 (step 151). In step 151, if there is the user name, a pointer to the user table corresponding to the user name is obtained (step 152), and the operation command identifier in the user table indicated by the pointer and step 13
Compare the operation command identifier obtained in step 1 (step 15)
3). If the operation command identifiers match in step 153, a pointer to the mail file table corresponding to the operation command identifier is obtained (step 15).
4) Compare the e-mail file name in the mail file table indicated by the pointer with the e-mail file name of the operation parameter obtained in step 131 (step 15).
5). If the e-mail file names match in step 155, a pointer to the message table corresponding to the e-mail file name is obtained (step 15).
6) get the e-mail pointed to by the pointer (step 1)
57). After the end of step 157, the user name, the operation command identifier, the operation parameters received in step 131, and the e-mail obtained in step 157 are passed to the operation processing section 16 (step 158).

If the user name does not exist in step 151, or the operation command identifier does not match in step 153, or if the e-mail file name does not match in step 155, the operation check unit 15 determines that an error has occurred. Then, the user name and the operation command identifier obtained in step 131 are passed to the command response assembling unit 14 (step 159).

The command response assembling section 14 executes step 15
A communication result is assembled by adding a response result, which is an error code indicating that operation is not possible, to the user name and the operation command identifier obtained in step 9 and passed to the communication control unit 12 (step 14).
1).

The communication control unit 12 assembles a communication frame by adding network information to the communication data obtained in step 141, and transmits it to the terminal device A (step 12).
2).

The operation processing unit 16 performs an operation indicated by the operation command identifier on the e-mail in the e-mail file M180 corresponding to the user name obtained in step 158 (step 161), and the processing result Is transmitted to the command response assembling unit 14 together with the user name and the operation command identifier obtained in step 158 as a response result (step 162).

The command response assembling section 14 executes step 16
A response result is added to the user name and the operation command identifier obtained in Step 2 to assemble communication data, and the communication data is transferred to the communication control unit 12 (Step 142).

The communication control unit 12 adds network information to the communication data obtained in step 142 to assemble a communication frame and transmits it to the terminal device A (step 12).
3).

Upon receiving the communication frame at the terminal device A, the user decomposes the communication frame, further decomposes the communication data, and outputs a user name, an operation command identifier, and a response result indicating an error code or operation processing result. obtain.

When the user of the terminal device A issues a delete operation request command to the electronic mail when the information of the definition file 17 is in the state of FIG.
5, an error is determined, and the user of the terminal device A obtains a response result indicating the error. Further, when the user of the terminal device A issues a delete operation request command to the e-mail from the user of the terminal device Y, the determination result is correct in the operation check unit 15, and the user of the terminal device A receives the operation processing result. Is obtained.

Thus, the processing of the electronic mail system, which is the operation of the first embodiment of the present invention, is completed.

In the electronic mail system according to the first embodiment of the present invention, in the electronic mail server, the operation attribute from the electronic mail client is defined for each electronic mail, whereby the electronic mail client is erroneously prohibited. When an operation command request is sent, by sending a response result indicating an error to the e-mail client, a highly reliable e-mail system can be constructed and the file access right, which is a conventional technology, is used. This has an effect that the e-mail file can be used more efficiently than the definition of the operation attribute described above.

Referring to FIG. 1, an e-mail system according to a second embodiment of the present invention is the same as the e-mail system according to the first invention, except that an e-mail in an e-mail file on an e-mail server can be used. Regarding the operation of the e-mail client that is either one of
A process of adding or deleting an operation attribute is performed by inputting an operation attribute change command from one of the operation terminal and the system console to the operation attribute defined in the definition file 17. And a definition file processing unit 19.

Next, the operation of the second embodiment of the present invention will be described with reference to FIG. 1, FIG. 2, FIG. 3, FIG. 5, and FIG.

In the control table on the memory in the state of FIG. 3 which stores the definition information of the definition file 17 of FIG. 2, the sender name is the user of the terminal device Y and is stored in the e-mail file M180. An example of adding a definition that prohibits the user of the terminal device A from deleting an existing e-mail will be described below.

On the host computer 10 which is an e-mail server, a user can input a user name (A), an operation command identifier (deletion prohibited), an e-mail file name (M180), and an e-mail from an operation terminal or a system console. The definition file processing unit 19 is started by specifying the definition information composed of the e-mail information including the sender name (Y) of the above as a parameter and further specifying "additional command" as the operation attribute change command.

The definition file processing unit 19 first determines whether the command input from the operation terminal or the system console is an addition command or a deletion command (step 191).

If the input command is an additional command, the definition file processing unit 19 extracts the user name from the definition information parameter (step 192), and searches the user list table in the definition file 17 by the user name. And
It is determined whether the same user name exists (step 193). If the same user name already exists in the user list table in step 193, the user name is not registered twice and the process proceeds to step 195. Step 1
If the user name does not exist in step 93, the user name is registered in the user list table (step 19).
4). In this embodiment, since the user name A already exists in the user list table, it is not registered twice.

Next, the definition file processing unit 19 extracts an operation command identifier from the definition information parameter (step 195), and uses the operation command identifier to define the definition file 1
It is determined whether the same operation exists in the operation command identifier in the user table indicated by the pointer added to the user name in the user list table in 7 (step 196). If the same operation already exists in the user table in step 196, the operation is not registered in duplicate, and the process proceeds to step 199. If there is no operation in step 196, the operation is registered in the user table (step 197), and a pointer indicating the address where the operation is registered is added to the user name in the user list table (step 197). Step 198). In this embodiment, since the delete operation already exists in the user table, it is not registered twice.

Next, the definition file processing unit 19 extracts the e-mail file name from the definition information parameter (step 199), and adds the e-mail file name to the operation command identifier in the user table in the definition file 17 using the e-mail file name. It is determined whether the same e-mail file name exists in the e-mail file names in the mail file table indicated by the pointer (step 19A). If the same e-mail file name already exists in the mail file table in step 19A, the e-mail file name is not registered in duplicate, and the process proceeds to step 19D.
If the e-mail file name does not exist in step 19A, the e-mail file name is registered in the mail file table (step 19B), and a pointer indicating the address where the e-mail file name is registered is stored in the user table. Add to the operation (step 19
C). In this embodiment, since the e-mail file name M180 already exists in the mail file table, it is not registered twice.

Next, the definition file processing unit 19 extracts the sender name of the electronic mail from the definition information parameter (step 19D), and uses the sender name as the electronic mail file name in the mail file table in the definition file 17. It is determined whether the same sender name exists in the sender names in the message table indicated by the added pointer (step 19E). If the same sender name already exists in the message table in step 19E, the e-mail information is not registered in duplicate. If the sender name does not exist in step 19E, the e-mail information is registered in the message table (step 19F), and a pointer pointing to the address where the e-mail information is registered is set in the e-mail file in the mail file table. The name is added to the name (step 19G). In this embodiment, the sender name Y
Is already registered in the message table, so it is not registered twice.

When the processing up to step 19E is performed on the control table in the memory of FIG. 3 in which the definition information of the definition file 17 of FIG. 2 is stored, the control table becomes the state of FIG.

In the control table on the memory in the state of FIG. 5, from the definition information for the user of the terminal device A, the definition information for prohibiting the deletion operation of the user of the terminal device Y for the electronic mail is deleted. An example of the case will be described below.

On the host computer 10 which is an electronic mail server, a user can input a user name (A), an operation command identifier (deletion prohibited), an electronic mail file name (M180), and an electronic mail from an operation terminal or a system console. The definition file processing unit 19 is started by specifying the definition information consisting of the e-mail information including the sender name (Y) as a parameter, and further specifying a "delete command" as an operation attribute change command.

The definition file processing section 19 executes step 19
In step 1, if the input command is a delete command, it checks whether or not there are four pieces of information of a specified definition information parameter: a user name, an operation command identifier, an e-mail file name, and an e-mail sender name. (Step 19H).

In the inspection in step 19H, if all four pieces of information of the definition information parameter are present, the user name for the user list table, the operation command identifier for the user table, the e-mail file name for the mail file table, and the message table The validity of the sender's name is checked (step 19).
I) If all are correct, the electronic mail information of the sender name is deleted from the message table (step 19J). Further, it is determined whether or not the pointer added to the e-mail file name in the mail file table holds a pointer indicating a sender name other than the sender name in the message table (step 19K). If it does not hold a pointer to a sender name other than the user name, the user name in the user list table, the operation command identifier in the user table, and the e-mail file name in the mail file table All information is deleted (step 19L).

The definition file processing section 19 executes step 19
H when all four information is missing, and step 1
If any invalid information is found in 9I, an error is returned to the operation terminal or the system console (step 19M). If it is determined in step 19K that a pointer indicating a caller name other than the caller name is held, the process ends.

When the processing up to step 19J is performed on the control table on the memory in the state of FIG. 5, the control table becomes the state of FIG.

Thus, the processing of the electronic mail system, which is the operation of the second embodiment of the present invention, is completed.

The e-mail system according to the second embodiment of the present invention is characterized in that an e-mail server defines an operation attribute for each e-mail and changes an operation attribute with respect to an operation from an e-mail client. When a prohibited operation command request is erroneously transmitted from an e-mail client, a response result indicating an error is transmitted to the e-mail client, so that a highly reliable e-mail system can be constructed, and a conventional e-mail system can be constructed. This has an effect that the e-mail file can be used more efficiently than the definition of the operation attribute using the file access right, which is a technology.

[0048]

As described above, the e-mail system according to the present invention allows an e-mail server to define an operation attribute for each e-mail or to change an operation attribute for an operation from an e-mail client. By sending a response result indicating an error to the e-mail client when a prohibited operation command request is erroneously transmitted from the e-mail client, a highly reliable e-mail system can be constructed. Compared with the definition of the operation attribute using the file access right, which is the technique of the above, there is an effect that the e-mail file can be used efficiently.

[Brief description of the drawings]

FIG. 1 is a block diagram showing first and second embodiments of the present invention.

FIG. 2 is a definition file 1 according to the first embodiment of the present invention.
FIG. 7 is a diagram showing a definition example of an operation attribute in FIG.

FIG. 3 is a definition file 1 according to the first embodiment of the present invention.
7 is a diagram showing an example in which the operation attribute of No. 7 is developed in a control table on a memory. FIG.

FIG. 4 is a communication control unit 1 according to the first embodiment of the present invention.
2, operation command analysis unit 13, command response assembly unit 1
4 is a flowchart showing processing of an operation check unit 15 and an operation processing unit 16;

FIG. 5 is a definition file 1 according to a second embodiment of the present invention.
7 is a diagram showing an example in which the operation attribute of No. 7 is developed in a control table on a memory. FIG.

FIG. 6 is a flowchart showing processing of a definition file control unit 19 according to the second embodiment of the present invention.

DESCRIPTION OF SYMBOLS 10 Host computer 11 E-mail control device 12 Communication control unit 13 Operation command analysis unit 14 Command response assembling unit 15 Operation check unit 16 Operation processing unit 17 Definition file 19 Definition file control unit 20 E-mail transmission / reception processing unit 30 Line 31 Line 32 Line

Claims (2)

(57) [Claims] 1. A from the e-mail client is either one of the host computer and the terminal, email is one either on other host computers and terminals
Against the e-mail in the e-mail file of Rusaba
That search, reference, deletion, and an electronic mail system for operations such as transmission, the e-mail server is the electronic mail client
Which receives an operation command request including a pressurized et transmitting communication protocol, a communication control unit for transmitting the operation result of the operation command of this <br/> to the e-mail client, the communication protocol of the operation command request Analyze and email
An operation command analysis unit for taking out the operation request for Lumpur, the operation requests extracted by the operation command analyzing unit, previously stored the e-mail class definition file
In the operation attribute for e-mail for each client user ,
Communication illustrating the determining operation check unit whether or not inconsistent, if the decision result in errors due to the operation check unit, the e-mail client <br/> down Toee error that has transmitted the operation command request A command response assembling unit that transmits an error command including a protocol, and if a determination result by the operation check unit is not an error,
An e-mail system comprising: an operation processing unit for operating e-mail in the e-mail file in accordance with the received operation command request. Wherein with respect to the e-mail server related to e-mail in the e-mail file on the bus, the electronic mail client operation attributes for each user of the previously stored <br/> the definition file, by turning on the operation attribute change command from one either one operation terminal and the system console, characterized in that it comprises the definition file processing unit to implement either one process of whether to add or delete the operation attribute The electronic mail system according to claim 1.