KR20010039759A - System and method of managing a remote mail server - Google Patents

Abstract

PURPOSE: A mail server remote management system and method is provided to transfer a message to a receiver, even in case that an E-mail user's address account is deleted or changed. CONSTITUTION: An ETS(Electronic mail Transfer Service) system is comprised of an ETS central management server(300), a database server(310), a web server(320), and a manager terminal(330). The ETS central management server(300) in which an ETS central management server monitor program(ETS_SVR_MON)(301) is installed, controls the E-mail service of a client mail server(110) by remote control. For an E-mail address recognized as a deleted or nonexistent account, the ETS central management server(300) reads an available E-mail address from the database server(310) according to a request of the client mail server(110) and transfers an E-mail message. A system manager in the ETS system monitors the ETS central management server(300) through the manager terminal(330) in which an ETS management tool program(331) is installed. The manager of the client mail server(110) accesses the web server(320) through an Internet network and monitors the E-mail processing of the client mail server(110) by remote control. In the web server(320), a manager login program(321) is installed and driven.

Description

SYSTEM AND METHOD OF MANAGING A REMOTE MAIL SERVER}

The present invention relates to an e-mail management system and method, and more particularly, to an e-mail delivery service (ETS) that delivers an e-mail sent to an e-mail address recognized as an account that is deleted or does not exist in a mail server (ETS). and an email server management system and method for remotely managing email processing of each mail server.

Communication means, called electronic mail or E-mail, are becoming the most important communication medium in the information age. The e-mail is transmitted not only through a text message composed of ASCII characters, but also through a local area network or the Internet together with a voice message, a spreadsheet, image information, and the like.

1 is a diagram showing an electronic mail processing sequence of an electronic mail system according to the prior art. Referring to FIG. 1, an electronic mail processing method according to the prior art is as follows.

That is, the sender-side mail server 100 to send an e-mail transmits a 'HELLO' code for checking the connection state of the network for communication to the receiver-side mail server 200 (S120). The mail server 200 transmits a '250' code indicating that the network is physically connected well (S121).

Subsequently, the sender side mail server 100 transmits (S122) 'MAIL FROM: <sskang@unitel.co.kr>' to send an e-mail to the receiver side mail server 200 from 'sskang'. As a result, when the receiving server 200 is ready to receive the electronic mail, the '250' code is returned (S123).

Subsequently, the sender-side mail server 100 sends an e-mail to the receiver-side mail server 200 to 'hong@hitel.co.kr' of the receiver-side mail server, and the message 'RCPT: <hong@hitel.co .ke> 'code is transmitted (S124).

At this time, if the 'hong@hitel.co.kr' is not in the list of the e-mail boxes of the recipient mail server 200, the '550' code is returned (S125), whereby 'hong@hitel.co.kr' This tells you that you are not the recipient system user. Subsequently, the sender side mail server 100 transmits a 'QUIT' code to be disconnected from the network (S126), and the receiver side mail server 200 disconnects (S127) by returning a '221' code thereto. .

Therefore, in the prior art e-mail transmission system, if there is no recipient e-mail address in the e-mail box list provided by the recipient-side mail server, the above-described steps (S124, S125, S126, S127) are performed, so the transmitted e-mail is transmitted. You will not be able to receive mail.

That is, for example, if a user who has a mail address account at 'hitel.co.kr' shown in FIG. 1 moves to a job or opens a new mail address account for other reasons, There is a problem that can not receive e-mail.

In addition, when an e-mail is sent to an e-mail address including an emoticon or a Hangul, Chinese character, or used character from around the world, the mail server according to the prior art recognizes it as a deleted account or an account that does not exist. There is a problem that the mail service cannot proceed.

On the other hand, in the case of the mail server according to the prior art, it is inconvenient to manage the system separately from the system administrator to manage the client mail server. Moreover, there has been a technical difficulty in system administrators of client mail servers to directly enter and manage spam lists or virus lists for spam or e-mail virus checks.

In particular, when a new virus suddenly appears, it is technically difficult and cumbersome for the system administrator of each client mail server to check the virus individually, and it has been insufficient to actively cope with it. In addition, even if content filtering is required for e-mail coming in and going out through a client mail server in order to maintain confidentiality of the company, it has been a technical difficulty for the system administrator to control it individually.

Accordingly, a first object of the present invention is to provide an e-mail system and method capable of delivering a message to a recipient even when an address account of an e-mail user is deleted or changed.

A second object of the present invention, in addition to the first object, provides an electronic mail system and method capable of delivering a message using an e-mail or other communication medium even when the e-mail user's address account is deleted or changed. It is.

It is a third object of the present invention to provide an electronic mail system and method capable of delivering an electronic mail message even for an electronic mail address containing special characters in addition to the first object.

A fourth object of the present invention is to provide an electronic mail system and method for remotely managing a mail server on a network in addition to the first object.

A fifth object of the present invention is to provide, in addition to the first object, an electronic mail system and method for centrally and remotely managing on a network so that a mail server checks for spam mail and electronic mail viruses.

A sixth object of the present invention is to provide, in addition to the first object, an electronic mail system and method for centrally and remotely managing a mail server to filter content of electronic mail.

1 is a view showing an e-mail processing method according to the prior art.

2 is a diagram showing the configuration of an E-mail delivery service (ETS) remote management system according to the present invention;

3 is a flow diagram illustrating a work flow of an E-mail delivery service (ETS) remote management system according to the present invention.

Figure 4a illustrates a process for performing spam and e-mail virus checks in accordance with the present invention.

Figure 4b is a diagram illustrating a process for registering spam and e-mail virus in an E-mail delivery service (ETS) remote management system according to the present invention.

Figure 4c is a view showing the process of checking the ETS version in the E-mail delivery service (ETS) remote management system according to the present invention.

Figure 4d is a view showing the process of checking the ETS active state in the E-mail delivery service (ETS) remote management system according to the present invention.

4E illustrates a process of performing an ETS module upgrade in an ETS remote management system according to the present invention.

4F is a diagram illustrating a process of inquiring processing status data of an ETS in an ETS remote management system according to the present invention;

FIG. 5A illustrates one embodiment of an ETS management tool initial screen for monitoring and checking ETS in real time in an E-mail delivery service (ETS) remote management system in accordance with the present invention; FIG.

FIG. 5B is a diagram illustrating an embodiment of an ETS distribution member information registration screen in an E-mail delivery service (ETS) remote management system according to the present invention; FIG.

FIG. 5C illustrates one embodiment of an ETS management tool screen for searching / modifying / deleting an email virus in an E-mail Delivery Service (ETS) remote management system in accordance with the present invention; FIG.

FIG. 5D illustrates an embodiment of an ETS management tool screen for searching / modifying / deleting spam mail information in an E-mail delivery service (ETS) remote management system in accordance with the present invention. FIG.

5E illustrates an embodiment of an ETS management tool screen for searching / modifying / deleting content filtering information in an E-mail Delivery Service (ETS) remote management system in accordance with the present invention.

5F illustrates an embodiment of an ETS management tool screen for performing statistical information retrieval in an electronic mail delivery service (ETS) remote management system in accordance with the present invention.

6A illustrates an embodiment of an initial screen of an ETS remote management service web page provided by an ETS web server according to the present invention.

Figure 6b is a diagram showing an embodiment of a spam mail management screen provided by the ETS web server according to the present invention.

Figure 6c is a view showing an embodiment of a spam mail registration screen provided by the ETS web server according to the present invention.

Figure 6d is a diagram showing an embodiment of a spam mail search screen provided by an ETS web server according to the present invention.

6E illustrates an embodiment of an email virus management screen provided by an ETS web server in accordance with the present invention.

Figure 6f illustrates an embodiment of an email virus registration screen provided by an ETS web server in accordance with the present invention.

Figure 6g illustrates an embodiment of an e-mail virus search screen provided by an ETS web server in accordance with the present invention.

Figure 6h is a diagram showing an embodiment of a content filtering management screen provided by an ETS web server according to the present invention.

6i is a diagram illustrating an embodiment of a content filtering information registration screen provided by an ETS web server according to the present invention;

FIG. 6J is a diagram illustrating an embodiment of an ETS client upgrade service screen provided by an ETS web server according to the present invention; FIG.

6K is a diagram illustrating an embodiment of an ETS statistics information providing screen provided by an ETS web server according to the present invention;

Figure 7 illustrates a first embodiment of a method for delivering an e-mail to a valid e-mail address by an E-mail Delivery Service (ETS) remote management system in accordance with the present invention.

8 is a diagram illustrating a process in which an ETS central management server system reads and delivers a valid email address from a database according to the present invention.

Figure 9 illustrates a second embodiment of a method for delivering an e-mail to a valid overseas e-mail address in an E-mail delivery service (ETS) remote management system according to the present invention.

FIG. 10 illustrates a third embodiment of a method for delivering an e-mail to an e-mail address composed of special characters, such as an emoticon, by the ETS remote management system according to the present invention; FIG.

<Description of the code | symbol about the principal part of drawing>

100: first mail server

200: second mail server

110: client mail server

111: ETS Client Monitor Program (ETS_CLI_MON)

112: ETS client program module

113,314: ETS Monitor Database

152: TCP / IP socket communication

300: ETS Central Management Server

301: ETS Central Management Server Monitor program (ETS_SVR_MON)

302: ETS program module

310: database server

311: ETS remote management database program module (ETS_MON.DLL)

312: ETS Monitor Database

320: web server

321: Administrator login program

330: manager terminal

331: ETS management tool program

In order to achieve the above object, the present invention provides a server-side ETS program module that performs a service for delivering an e-mail address recognized as an account that does not exist in the client mail server to a valid e-mail address, and the e-mail processed by the client mail server. An ETS central management server driven by an ETS central management server monitor program module for remotely managing a mail service through an Internet network; A database server having an ETS monitor database and running by the ETS remote management database program module; An ETS web server driven by an administrator login program module in communication with the ETS remote management database program module to allow an administrator of the client mail server to connect on the Internet to remotely control electronic mail processing of the client mail server; The mail server includes an ETS client program module for performing the ETS service and an ETS client program module for monitoring and managing the operation of the ETS client program running on the client mail server under the remote control of the ETS central management server monitor program module. It provides an electronic mail system comprising a.

In order to achieve another object of the present invention, the present invention provides a method for transmitting an e-mail from a sender's first e-mail address to a recipient's second e-mail address, the first mail transmitting the sender's e-mail. Confirming, by a server, whether or not the second e-mail address is present in a second mail server of the recipient receiving the e-mail; If the second mail server does not have the second e-mail address, sending the e-mail to a third mail server having a database storing a valid e-mail address of a recipient; And reading, by the third mail server, a valid e-mail address of the recipient from the database and transmitting the e-mail.

Hereinafter, an electronic mail system and method according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a diagram showing the configuration of an electronic mail transfer service (hereinafter referred to as "ETS") system according to the present invention. Referring to FIG. 2, the ETS system includes an ETS central management server 300, a database server 310, a web server 320, and an administrator terminal 330. The ETS central management server 300 according to the present invention may be equipped with an ETS central management server monitor program (ETS_SVR_MON) 301 and remotely control an e-mail service of the client mail server 110.

The ETS central management server 300 according to the present invention provides spam mail or mail virus filtering information to the client mail server 110 through the distributed ETS client monitor program (ETS_CLI_MON; 111), thereby controlling the spread of viruses remotely. can do.

The ETS central management server 300 according to the present invention reads a valid e-mail address with reference to the database server 310 of an e-mail address recognized as an account deleted or not present at the request of the client mail server 110. Thereby transferring the electronic mail message.

The ETS central management server 300 according to the present invention can upgrade the already distributed ETS client program module 112 by transmitting an ETS patch to the client mail server 110 via a network remotely. In addition, the ETS central management server 300 according to the present invention can create an optimal operating environment by periodically checking the ETS version of the plurality of client mail servers 110 connected through the network.

The ETS central management server 300 according to the present invention periodically checks the operating state of the distributed ETS client program 112, thereby maintaining the mail processing availability in an optimal state. The ETS central management server 300 according to the present invention may minimize the mail server management task by periodically reporting the monitor information extracted through the distributed ETS client monitor 111 to the corresponding administrator.

Referring back to FIG. 2, the system manager of the ETS system according to the present invention may monitor the ETS central management server 300 through the manager terminal 330. In the manager terminal 330 of the ETS system according to the present invention, an ETS management tool program 331 is installed to manage the ETS system. On the other hand, the administrator of the client mail server 110 may be connected to the web server 320 through the Internet network to monitor and control the electronic mail processing of the client mail server 110 remotely. The ETS web server 320 according to the present invention may be mounted and driven by the administrator login program 321.

3 is a flowchart illustrating a work flow of an ETS system according to the present invention. Referring to FIG. 3, the server-side ETS program module 302 of the ETS central management server according to the present invention uses the ETS program module 112 of the client mail server 110 and the simple mail transfer protocol (SMTP) protocol. In communication, an e-mail address of an e-mail address recognized as an account deleted or not existed in the client mail server 110 is sent to the ETS central management server 300 for processing.

A process of reading and transferring an e-mail recognized as an deleted account by the ETS program module 302 according to the present invention will be described later with reference to FIGS. 7 to 10.

Referring back to FIG. 3, the ETS Central Management Server Monitor program module (ETS_SVR_MON) 301 running on the ETS Central Management Server 300 may be configured with the TCP / ETS client monitor program module (ETS_CLI_MON) 111 of the client mail server 110. Performs IP socket communication 152, and ETS Central Management Server 300 distributes spam mail or e-mail antivirus remotely over the network to each client mail server, or ETS client program 112 The module patch operation may be performed or the ETS version of the client mail server 110 may be checked.

In addition, the ETS central management server program module (ETS_SVR_MON) 301 according to the present invention may check the ETS operation status of each client mail server and extract ETS monitor information. To this end, the system operator or administrator of each client mail server can access the homepage of the ETS web server 320 operated by the ETS central management server in the Internet network and remotely manage the electronic mail processing of the client mail server.

That is, the administrator of the client mail server connects to the homepage of the ETS web server 320 and operates the ETS remote management database program module (ETS_MON.DLL) 311 of the database server 310 operated by the ETS central management server 300. The interface may communicate with the ETS central management server program module (ETS_SVR_MON) 301.

When the administrator of the client mail server accesses the homepage of the ETS web server 320 according to the present invention and proceeds with the member login process, the ETS remote management database program module 311 refers to the ETS monitor database 312 and the client mail server. Read information including the IP address. Then, according to the spam mail list or e-mail virus check information entered by the administrator, the ETS central server monitor program 301 may spam or e-mail viruses to be blocked by the TCP / IP 152 communication to the client mail server 110. Communicate information

As a result, the ETS client monitor program module 111 of the client mail server 110 includes a spam list, an email virus list, a spam filtering log, an email filtering log, and the like in the ETS monitor database 113. Information such as an invalid e-mail address check log can be stored. As a preferred embodiment of the ETS monitor database 113 of the client mail server 110 in accordance with the present invention, an ETS ISAM file may be used.

That is, the ETS system according to the present invention is provided to an ETS client monitor program which is already distributed under the control of the ETS central management system and mounted on each client mail server when a spam mail or an email virus occurs. Adding information prevents the spread of e-mail viruses. At this time, the system administrator of the ETS central management system may access the ETS remote management database program module (ETS_MON.DLL) 311 through the ETS manager tool 331 of the manager terminal 330.

ETS system according to the present invention, in addition to finding a valid e-mail account for the e-mail recognized by the client mail server as the deleted account and forwarding the e-mail, ETS patch (ETS patch through the ETS client monitor program module 111) You can upgrade ETS client modules that are already distributed centrally and automatically, and check the version of ETS distributed to each client mail server periodically to create an optimal operating environment.

In addition, by periodically checking the operation status of the ETS client distributed to each client mail server, it is possible to maintain the mail processing availability in an optimal state. In addition, the ETS central management server 300 according to the present invention can extract the ETS monitor information of the client mail server 110, and transmit the result to the administrator periodically to reduce the client mail server management task.

4a to 4f, the remote management service method of the ETS system according to the present invention will be described in detail.

4A is a diagram illustrating a process of checking an e-mail virus and a spam mail by the ETS system according to the present invention. Referring to Fig. 4A, when an e-mail is received at the client mail server (step S420), the ETS client program module 112 of the client mail server 110 sends the received e-mail information to the ETS client monitor program module 111. Deliver (step S421).

Subsequently, the ETS client monitor program module 111 searches for an e-mail address, a sender e-mail address, a recipient e-mail address, a subject, a content, an attachment, a word combination, etc. designated by an administrator by referring to the ETS monitor database 113. Or, it is determined whether or not an e-mail virus (step S422). Subsequently, the ETS client program module 112 of the client mail server delivers the electronic mail to the mail sending program (sendmail 114) (step S423) and sends the electronic mail (step S424).

Figure 4b is a diagram illustrating a process for registering spam and e-mail virus in the ETS remote management system according to the present invention. Spam mail or e-mail virus registration according to the present invention is registered by the administrator of the client mail server 110 is connected to the ETS web server 320 via the Internet, or the administrator of the ETS central management server administrator terminal 330 You can access the ETS remote management database program module (ETS_MON.DLL) 311 to register spam and e-mail viruses.

Referring to FIG. 4B, the title 10, the content 11, the attachment file name 12, and the like may be registered through the ETS remote management database program module 311 to block the electronic mail virus. For example, if the 'I Love You' virus spreads, the system administrator can enter it to register to 'filter' e-mail infected with the 'I Love You' virus.

In addition, the spam mail may be blocked by registering the sender e-mail address 13, the recipient e-mail address 14, the subject 15, the content 16, and the word combination 17 to filter the spam mail. As an embodiment of the ETS system according to the present invention, a system administrator of a client mail server may send an e-mail containing specific words (eg, 'DRAM', 'sense amplifier', etc.) or content for the company's secret number. For security reasons, it can be managed remotely.

On the other hand, referring to Figure 4b, the ETS remote management database program module 311 according to the present invention is the ETS central management server monitor program (ETS_SVR_MON; 301) of the ETS central server 300, ETS mounted on each client mail server Spam and e-mail virus information registered in the client monitor program (ETS_CLI_MON) 111 is transmitted to store the list in the databases 314 and 113 where the filtering rules are stored.

4C is a diagram illustrating a process of checking an ETS version in an ETS remote management system according to the present invention. Referring to FIG. 4C, the system administrator accesses the ETS web server 320 through the Internet network, or accesses the ETS remote management database program module through the administrator terminal 330, and operates the ETS client operating in the client computer 110. The ETS client monitor program module 111 may be queried for the version of the program.

As a result, the ETS client monitor program module 111 running on the client mail server can respond to information such as country 20, region 21, company name 22, ETS version 23 and the like.

Figure 4d is a diagram illustrating a process of checking the ETS active state in the ETS remote management system according to the present invention. Referring to FIG. 4D, the ETS remote management database program module (ETS_MON.DLL) 311 according to the present invention periodically transmits a signal to the ETS client monitor program 111 of the client mail server. Confirm that the ETS is inactive.

4E is a diagram illustrating a process of performing an ETS module upgrade in an ETS remote management system according to the present invention. The ETS central management server according to the present invention can upgrade the already distributed ETS client program modules remotely for ETS patches. Referring to FIG. 4E, an administrator of the ETS central management server may upload the ETS client program module through the ETS remote management database program module (ETS_MON.DLL) 311 (step S430).

Subsequently, the ETS remote management database program module 311 instructs each client mail server 111 to download the ETS client module via the TCP / IP connection (step S431), and accordingly the new version of the ETS client program module ( 111) is downloaded (step S432). Meanwhile, the ETS client monitor program module ETS_CLI_MON 111 of the client mail server requests the ETS client program module ETS_CLI 112 to stop receiving the e-mail (step S433).

Subsequently, the ETS client program 112 module sends an upgrade signal to the ETS client monitor program 111 (step S435), and reloads the ETS client program of the new patch version (step S436).

4F is a diagram illustrating a process of querying ETS processing status data in an ETS remote management system according to the present invention. In the ETS system according to the present invention, the mail server administrator accesses the homepage of the ETS web server, the spam processing status of the client mail server, the e-mail virus processing status, the total mail sending status, the deleted mail processing status, and the normal mail processing status. The data can be inquired such as the current status, spam and e-mail virus registration status, ETS version information, and ETS operation status.

That is, the administrator of the ETS central management server 300 may query the mail processing information of the corresponding client mail server through a management tool installed in the manager terminal. In addition, the administrator of the client mail server may access the ETS web server to interface the ETS remote management database program (ETS_MON.DLL) 311 to control the ETS client monitor program (ETS_CLI_MON) 111.

5A illustrates an embodiment of an initial screen of an ETS management tool for monitoring and checking an ETS in real time in an ETS remote management system according to the present invention. The administrator of the ETS central management server according to the present invention can access the manager terminal, and the initial screen of the ETS management tool can access the ETS member information according to the classification by country (601) or region (602).

FIG. 5B is a diagram illustrating an embodiment of an ETS distribution member information registration screen in an electronic mail delivery service (ETS) remote management system according to the present invention. Referring to FIG. 5B, an ETS distribution member search can be performed through the ETS member search window 603, and the ETS member ID 604, company name 605, contact person 606, telephone number 607, fax Information such as number 608, e-mail address 609, and the like may be provided. Meanwhile, in order to modify ETS member information, an ETS member modification window may be opened and a corresponding item may be entered and modified.

5C is a diagram illustrating an embodiment of an ETS management tool screen for searching / modifying / deleting an electronic mail virus in an electronic mail delivery service (ETS) remote management system according to the present invention. Referring to FIG. 5C, a menu for searching, registering, modifying, and deleting electronic mail virus information in an ETS remote management system according to the present invention is provided.

When the email virus information search window 611 is opened, a virus name, virus type, title, registrant ID, registration date, and the like may be input. In addition, by creating an ETS email virus information registration window 612, for example, 'Love Virus' can be entered to 'delete the file on the hard when checking email'.

FIG. 5D is a diagram showing an embodiment of an ETS management tool screen for searching / modifying / deleting spam mail information in an electronic mail delivery service (ETS) remote management system according to the present invention. Referring to FIG. 5D, the administrator may filter spam through, for example, a sender e-mail address through the ETS spam mail information registration window 614 of the ETS management tool. If you want to modify or delete the registration information of the spam mail, you can edit or delete the spreadsheet after selecting the spreadsheet.

FIG. 5E is a diagram illustrating an embodiment of an ETS management tool screen for searching / modifying / deleting content filtering information in an electronic mail delivery service (ETS) remote management system according to the present invention. Referring to FIG. 5E, the administrator of the ETS central management server according to the present invention opens the filtering information registration window 616 and performs ETS filtering registration by inputting filtering classification, filtering information, reception ID, reception date, reception time, and the like. can do. In addition, the administrator may search 617 the filtering information according to the filtering classification such as the sender email address.

FIG. 5F is a diagram illustrating an embodiment of an ETS management tool screen for performing statistical information retrieval in an electronic mail delivery service (ETS) remote management system according to the present invention. Referring to FIG. 5F, when the system administrator inputs the search start date to the last day through the ETS statistics search window 623, the registration date 618, spam processing number 619, and deleted account processing number ( 620, the normal mail processing number 621, the mail virus processing number 622, and the like can be provided.

6A is a diagram illustrating an embodiment of an initial screen of an ETS remote management service web page provided by an ETS web server according to the present invention. Referring to FIG. 6A, an Internet user accessing a homepage provided by a web server of an ETS system according to the present invention may download and install an ETS client program 700 (701) on the Internet.

6B is a diagram illustrating an embodiment of a spam mail management screen provided by an ETS web server according to the present invention. Referring to FIG. 6B, members of an ETS system (Delnet web server) in accordance with the present invention can register 704 and search 705 spam mail on the Internet. Clicking the spam mail registration button 704 provides the registration window shown in Fig. 6C, and the ETS member can register a spam mail address 707, contents 708, and the like on the web. In addition, the ETS member may access the ETS web server and perform a spam mail search 709.

6D is a diagram illustrating an embodiment of a spam mail search screen provided by an ETS web server according to the present invention. ETS members can search the spam mailing list by entering the start date and the last date of the registration date.

6e to 6k exemplarily illustrate web screens for receiving e-mail virus registration, content filtering registration, and statistical information inquiry provided remotely from the Internet through the Internet.

Referring to FIG. 6E, a member who installs an ETS client program registers and accesses a web server of an ETS system in accordance with the present invention a function of preventing a reception by detecting a virus infected with an e-mail coming into a member account in advance (711). , Search 712 or cancel 713.

6F is a diagram illustrating an embodiment of an e-mail virus registration screen provided by an ETS web server according to the present invention. Referring to FIG. 6F, a member may register an email virus 714, and the ETS web server according to the present invention may receive information such as a virus name, type, title, content, attachment, and the like.

Figure 6g is a view showing an embodiment of the e-mail virus search screen provided by the ETS Web server according to the present invention. Referring to FIG. 6G, an email virus may be searched for by type, name, and date of registration 718.

6H is a diagram illustrating an embodiment of a content filtering management screen provided by an ETS web server according to the present invention. Referring to 6h, it is a view showing a web screen provided by the ETS web server according to the present invention for filtering specific content for the incoming and outgoing e-mail through the mail server.

6I is a diagram illustrating an embodiment of a content filtering information registration screen provided by an ETS web server according to the present invention. Referring to FIG. 6I, a user accessing an ETS web server according to the present invention may register content filtering by inputting filtering classification and filtering information including a recipient email address and the like.

6J is a diagram illustrating an embodiment of an ETS client upgrade service screen provided by an ETS web server according to the present invention. Referring to FIG. 6J, a user accessing an ETS web server according to the present invention may request 726 to check a distribution ETS version.

6K is a diagram illustrating an embodiment of an ETS statistics information providing screen provided by an ETS web server according to the present invention. Referring to FIG. 6K, the ETS web server according to the present invention provides the user with service statistics data 728 such as spam mail processing, mail virus processing, deleted account processing, normal mail account processing, filtering processing, etc. of the mail server. Can be provided on the web. In addition, it is possible to receive the statistical data of the mail server by e-mail via the list mail receiving (729).

7 to 10, an e-mail delivery process of the ETS system according to the present invention will be described in detail.

7 is a diagram showing a first embodiment of a method for delivering an e-mail to a valid account by the ETS remote management system according to the present invention. The sender side mail server (first mail server) 100 transmits a 'HELLO' protocol for checking the connection state of the communication network to the receiver side mail server (second mail server) 200 (S120). The mail server (ie, the second mail server) 200 transmits a '250' protocol indicating that the network is physically connected without a problem (S121).

Subsequently, the sender side mail server 100 transmits (S122) 'MAIL FROM: &lt; sskang @ first server &gt;' indicating that the electronic mail from subscriber 'sskang' is to be transmitted to the second mail server 200. As a result, when the receiving side second mail server 200 is ready to receive the electronic mail, it returns the '250' protocol (S123).

Subsequently, the sender-side mail server 100 inquires whether the account 'hong' exists among the accounts managed by the receiver-side mail server, using the VRFY command (S250). do. As a result, when there is an account 'hong' among the accounts managed by the second mail server, the server responds (S250) using the '250' protocol to receive the e-mail in a manner similar to the prior art.

However, when the '550' protocol is responded (S252) because the account 'hong' does not exist, the first server terminates the connection with the second server using the QUIT command, and the first mail server uses the 'hong' The service is requested to the third mail server 300 which holds the account information of the past and the present.

Here, as a preferred embodiment of the third mail server 300, the ETS central management server according to the present invention can be used, the above-mentioned first mail server 100 and the second mail server 200 is an ETS client program It is characterized by mounting a module.

The third mail server according to the preferred embodiment of the present invention may have a database containing a past e-mail address, a current e-mail address, a fax phone number, a mobile communication number, a pager number, etc. that 'hong' had. have.

Thus, for example, if 'hong' closes the 'hong @ second mail server' account and has a new account 'hong4 @ fourth mail server' due to a change of job or other reasons, the third mail server ( The smart mail server according to the present invention reads the facts from the subscriber account database and transmits the e-mail to the currently valid account 'hong4 @ fourth mail server'.

At this time, the electronic mail system according to the preferred embodiment of the present invention may transmit a message from a database of 'hong' by fax, telephone, pager, short message service (SMS) or the like.

Referring back to FIG. 7, the first mail server transmits a 'HELLO' protocol for initiating e-mail communication to a third mail server (ETS central management server) (S253), and the third mail server responds thereto (S254). )do.

At this time, unlike the second server described above, the third server sends a '250' OK response unconditionally to the request S253 of the first server. Subsequently, the first mail server notifies the transmission of the e-mail (S255) from the 'sskang @ first mail server', and sends a 'hong @ second mail server' to the 'hong @ second mail server' when receiving the '250' protocol from the third mail server. It accepts the protocol of 'RCPT TO: <hong @ second mail server> for sending mail.

Subsequently, after receiving all mail contents from the first server, the third mail server terminates the connection with the first server using the 'QUIT' command. Subsequently, the third mail server (smart mail server) searches the account database of 'hong' to find a valid account through which the message can be delivered to 'hong' at this time.

As a preferred embodiment of the present invention, the recipient and sender need not necessarily be members of a third mail server (ie, an ETS central management server). For example, if A wants to send an e-mail to B, he may of course be a member or a nonmember, since A is the sender.

Furthermore, as described above, since the third server responds to the first server with a '250 OK' unconditionally to the 'RCPT TO' command, the receiver B does not care whether the member B is a member or a non-member of the smartmail server. Then, the smart mail server 300 performs an e-mail transmission task to a valid mail server 'hong4 @ fourth mail server' using the aforementioned protocol. At this time, the smart mail server may transmit the advertisement message together. Finally, when the transmission of the e-mail is completed, the first mail server 100 ends the task, and the third mail server 300 continues the operations S257 and S258.

8 is a diagram illustrating a process for delivering an e-mail to a valid account by an ETS central management server system according to an embodiment of the present invention. The e-mail system according to an embodiment of the present invention searches for a currently valid account associated with the receiving account 'hong @ second mail server' through the account database search step (S302) held by the ETS central management server 300. If it exists (S303), it is sent to the new account 'hong4 @ fourth mail server.'

At this time, if there is no valid account of 'hong', it informs 'sskang' that no valid ID exists (S305). On the other hand, when the sender uses the ETS central management server as the first mail server, the sender can additionally be provided with the aforementioned e-mail service every time the e-mail is transmitted.

That is, when the first mail server is the ETS central management server, the sender may search the recipient information database of the e-mail requested to be transmitted and correctly send the e-mail to the latest updated account. In addition, the e-mail delivery system according to the present invention can deliver a message through other media by providing not only a valid e-mail account in the account database held by the ETS central management server, but also a fax number, a pager number, a mobile phone number, and the like. .

In a preferred embodiment of the present invention, the message delivery medium can be specified by specifying a specific format at the beginning of the account. For example, you can request to send a fax using an account format such as' fax @ smart mail 'or'sskang@fax.smart mail'.

On the other hand, sender A has an account of 'sskang@unitel.co.kr', and receiver B has an account of 'smith@aol.com' and is now 'smith @ microsoft. Let's assume that the sender A sends an e-mail to the receiver B, assuming that the account is changed to the com 'account.

At this time, the first mail server unitel receives a response from the second mail server aol that a mail account cannot be found, and the first mail server requests a third mail server (ETS central management server) to transmit mail. Since the third mail server is not registered as a member of smith, a situation arises in which an error mail has to be sent.

In order to solve this problem, if a plurality of countries each have an ETS central management server, and there is no recipient B account in the ETS central management server of the first country, the second, third, and fourth E-mail can be requested to the ETS central management server of the prepared country. The mail delivery system using the multi-national ETS central management server will be described below.

9 is a diagram illustrating an electronic mail system according to a second embodiment of the present invention. For sending e-mail from the first mail server to which Sender A of the first country (sskang @ first mail server) is subscribed, to Recipient B (smith @ second mail server) who was a member of the second mail server of the second country. For the VRFY command, the second mail server no longer exists because 'smith @ second mail server' no longer exists, and thus informs the first mail server that there is no account by sending a '550' code.

As a result, the first mail server of the first station hands over the e-mail to the third mail server of the first station (eg, ETS Central Management Server Korea 450). Subsequently, the third mail server 450 of the first country searches its own database, and if there is no corresponding account, the third mail server such as a second station, a third station, a fourth station, etc., prepared in the whole world ( For example, an attempt is made to connect to the ETS central management server USS, the ETS central management server Japan, etc. (460) (S401).

Subsequently, the first station third mail server 450 issues a 'FIND' command to the second station third mail server 460 to search for a valid account of smith @ 2nd mail server (S403). As a result, the second station third mail server 460 responding with "FINDOK" is handed over to the second station third mail server 460 (S405 and S406), and the third station third mail server 460 searches the database. You can proceed with the delivery of mail to a valid account. Here, the commands 'CONNECT' (S401), 'CONNECTED' (S402), 'FIND' (S403), and 'FINDOK' (S404) are commands for communication between third mail servers 450 and 460 prepared in multiple stations. As an alternative, other preferred commands corresponding thereto may be used.

The electronic mail paging technique of the ETS central management server according to the present invention can be applied to an emoticon electronic mail. Here, an emoticon is a compound word emoticon of an emotion and an icon, and is a new generation of self-expression method for representing an e-mail address using special character symbols and the like.

In other words, the emoticon e-mail account service is an appropriate e-mail account addressing method for new generation young people who value their own unique expressions or businessmen who want to impress business partners. Examples of the e-mail address using the emoticon may be ^.^@unitel.co.kr, ~ m ^. ^ M ~, -.-@yahoo.com.

However, since the e-mail address using the emoticon described above is recognized as a deleted or non-existing e-mail account in most mail servers, the second mail server 200 responds with a '550' protocol in step S252. The first server 100 cannot send an e-mail to a recipient having an e-mail account address composed of emoticons. The ETS system technology according to the present invention provides a method of forwarding an e-mail even to an e-mail address composed of the above emoticons.

10 is a diagram illustrating an electronic mail paging system according to a third embodiment of the present invention. The e-mail paging system according to the third embodiment of the present invention does not process not only the e-mail address using the emoticon described above, but also the e-mail account expressed in Korean or the e-mail account expressed in characters used in each country as a deletion account. It provides technology to find valid accounts and deliver e-mail.

Referring to Fig. 10, the sender side mail server (first mail server; for example unitel.co.kr; 100) is connected to the receiver side mail server (second mail server; for example hitel.co.kr; 200). The 'HELO' protocol for checking the communication network connection status is transmitted (step S500), and the receiver side mail server 200 transmits the '250' protocol indicating that the network is physically connected without a problem (step S510). do.

Subsequently, the sender-side mail server (first mail server) 100 transmits 'MAIL FROM: <sskang @ first server>' indicating that an email from subscriber 'sskang' is to be transmitted to the second mail server 200. FIG. (Step S511). As a result, the receiving second mail server 200 returns a '250' protocol indicating that it is ready to receive the electronic mail (step S512).

Subsequently, the sender-side mail server 100 checks whether the account '~ m ^. ^ M ~' exists among the accounts managed by the receiver-side second mail server 200 in the receiver-side mail server 200. Inquire whether it is using the VRFY instruction (step S513). As a result, in most e-mail servers used according to the prior art, an e-mail account composed of emoticons is recognized as a deleted or non-existent account, and thus a signal indicating '550' protocol, that is, NOT A USER ON THIS SYSTEM. (Step S514).

Subsequently, the first server 100 terminates the connection with the second server 200 using the QUIT command (steps S515 and S516), and the first mail server is associated with '~ m ^. ^ M ~'. A service is requested to a third mail server (ETS central management server according to the present invention) 300 having a database storing valid account information (step S520).

That is, the third mail server 300 according to the present invention (ETS central management server) 300 corresponds to '~ m ^. ^ M ~' and has a valid account (ie, a combination of general ASCII characters) that can be recognized by general mail servers. E-mail address) is read from the subscriber account database, and the e-mail is paged to the read address.

Referring back to FIG. 10, the first mail server 200 transmits the 'HELO' protocol for initiating electronic mail communication (step S520), and the third mail server responds thereto (step S521). Subsequently, the first mail server notifies the third mail server of the transmission of the e-mail from the 'sskang @ first mail server' (step S522), and receives a '250' protocol from the third mail server (step S523). A protocol of 'RCPT TO: <~ m ^. ^ m ~ @ 2nd mail server>' to send an e-mail to a ~m^.^m~@second mail server 'is accepted (step S524).

At this time, unlike the second server, the third server returns a '250' OK response unconditionally to the request of the first server (step S525). Subsequently, after receiving all mail contents from the first mail server, the third mail server terminates the connection with the first server by using the 'QUIT' command (steps S526 and S527).

Meanwhile, the third mail server searches the account database of '~ m ^. ^ M ~' and sends an e-mail to a currently valid e-mail address. At this time, the third mail server may transmit a message from a database of '~ m ^. ^ M ~' by a currently valid voice mailbox, a text mailbox, a fax, a telephone, a pager, a short message service, or the like.

The e-mail paging technology according to the present invention not only deletes an e-mail account but also a paging service to a valid account for an emoticon e-mail account, as well as an e-mail account composed of Korean characters or an e-mail account composed of international characters. The same service can be provided.

In other words, the Hangul e-mail account service can be used to expand the e-mail service that has been available only to the e-mail account consisting of English and Arabic numerals to the e-mail account with the Hangul. For example, an ETS central management server according to the present invention is provided for an e-mail sent to a Korean e-mail address consisting of 'Kim Sung-ho@delynet.com', 'Big Son @ Seong-Hone Family', 'Kim Sung-ho@Delnet.Marketing Team', and the like. Finds a payable e-mail account that can be delivered from the database of 'Sung-ho Kim' and sends the e-mail.

In addition, by sending an e-mail address consisting of unique characters of each country, such as Russia and Japan, to a valid mail address corresponding to the smart mail server, netizens of each country can freely use the e-mail exchange in the local language. For example, '金聖昊 @delynet. com will be able to exchange e-mail addresses for e-mail addresses such as "Kim Hyo @@ Hyo Kami" and "Kyosei Yoko".

Meanwhile, the ETS central management server according to the present invention may generate an advertisement revenue by inserting an advertisement at the top or bottom of the e-mail in the step of finding an effective mail account and transmitting an e-mail. In this case, the smart mail server according to the present invention may transmit the advertisement contents together with the transmission of the electronic mail, in response to receiving permission from the member in the member registration step. In this case, since the target advertisement is possible for registered members, an effective advertisement effect can be expected from an advertiser's point of view.

The foregoing has outlined rather broadly the features and technical advantages of the present invention to better understand the claims of the invention which will be described later. Additional features and advantages that make up the claims of the present invention will be described below. It should be appreciated by those skilled in the art that the conception and specific embodiments of the invention disclosed may be readily used as a basis for designing or modifying other structures for carrying out similar purposes to the invention.

In addition, the inventive concepts and embodiments disclosed herein may be used by those skilled in the art as a basis for modifying or designing other structures for carrying out the same purposes of the present invention. In addition, such modifications or altered equivalent structures by those skilled in the art may be variously changed, substituted, and changed without departing from the spirit or scope of the invention described in the claims.

As described above, the electronic mail system and apparatus according to the present invention uses an ETS central management server having a valid recipient email account database, so that the electronic mail transmitted to the old account even when the subscriber changes his or her account or changes for other reasons. It is possible to deliver mail to a currently valid account. In addition, the electronic mail system and apparatus according to the present invention has the advantage that it is possible to deliver the message through other communication media such as short text, fax, pager, mobile phone.

In addition, the electronic mail system and the device according to the present invention can be transmitted to a valid account without being treated as a deletion account even for an email address composed of emoticons, Korean characters or national special characters.

In addition, the ETS system according to the present invention can remotely control the electronic mail processing of the client mail server on the network. As a result, the system administrator can check spam mails and e-mail viruses in a web environment, and can check the operation status of the mail server on the Internet.

Claims (35)

The server-side ETS program module that performs a service of delivering an e-mail address recognized as an account that does not exist in the client mail server to a valid e-mail address, and the e-mail service processed by the client mail server are managed remotely through the Internet. An ETS central management server on which the ETS central management server monitor program module is driven; A database server having an ETS monitor database and running by the ETS remote management database program module; An ETS web server driven by an administrator login program module that communicates with the ETS remote management database program module so that an administrator of the client mail server connects over the Internet to remotely control electronic mail processing of the client mail server; Including, the client mail server An ETS client program module for performing the ETS service and an ETS client program module for monitoring and managing the operation of the ETS client program running on the client mail server under the remote control of the ETS central management server monitor program module E-mail system comprising a. 2. The electronic mail system according to claim 1, wherein the ETS server program module of the ETS central management server and the ETS client program module of the client mail server communicate by SMTP protocol. 2. The electronic mail system according to claim 1, wherein the ETS central management server monitor program module of the ETS central management server and the ETS client monitor program of the client mail server communicate by TCP / IP protocol. 2. The electronic mail system of claim 1, wherein the client mail server and the ETS central management server further comprise a send mail program module. The method of claim 1, wherein the ETS client monitor program module Distributing spam or e-mail antivirus to the client mail server; A patch upgrade process of the ETS client program module running on the client mail server; Checking a version of the ETS client program running on the client mail server; ETS monitor information extraction process of the client mail server E-mail system, characterized in that any one or a combination thereof. According to claim 1, ETS remote management database program module running in the database server is the ETS to allow the administrator of the client mail server connected to the ETS Web server to remotely manage the electronic mail processing of the client mail server in the Internet network An e-mail system for performing an interface with the ETS Central Management Server Monitor program of the Central Management Server. The ETS remote management database program module running on the database server is configured to allow the administrator of the ETS central management server to remotely manage electronic mail processing of a plurality of client mail servers connected to the ETS central management server. An E-mail system characterized in that it interfaces with the ETS Central Management Server monitor program of the ETS Central Management Server. The electronic mail system according to claim 1, wherein the electronic mail management system further comprises an administrator terminal on which an ETS management tool program is driven. The ETS central management server according to claim 8, wherein the manager of the ETS central management server interfaces with the ETS remote management database program of the database server through the ETS management tool program running on the manager terminal, or the ETS central management of the ETS central management server. An electronic mail system characterized by remotely managing electronic mail processing of a plurality of client mail servers by directly communicating with a server monitor program. The ETS monitor storage file of claim 1, wherein the client mail server comprises one or a combination of a spam list, an email virus list, a spam filtering log, an email virus filtering log, and a valid email address check log. E-mail system comprising a. The method of claim 1, wherein the administrator of the client mail server accessing the web server accesses the ETS remote management database module through the management tool program of the web server to check spam or e-mail virus of the client mail server, An e-mail system, characterized in that it remotely controls any one or a combination of spam filtering, e-mail filtering, and effective e-mail delivery services. Requesting delivery of the e-mail by accessing an ETS central management server that provides a service for delivering an e-mail by searching a database for a valid e-mail account corresponding to an e-mail address that is recognized as a deleted or non-existent account. A method for processing a mail by a client mail server including an ETS client program module, an ETS client monitor program module for monitoring the operation of the ETS client program, and a mail sending program module, The ETS client program module receiving an e-mail; The ETS client program module providing information of the e-mail to the ETS client monitor program module; The ETS client monitor program checks a spam mail or an e-mail virus by referring to a database; And When the e-mail passes in the spam mail or e-mail virus check step, the e-mail is transmitted through the send mail program module. E-mail management method comprising a. 13. The method of claim 12, wherein said ETS client program module further comprises recording an email processing history in a history recording database. The database of claim 8, wherein the database storing information classified as a spam mail or an email virus includes any one or a combination of an email sender address, an email recipient address, a subject, a content, an attachment file name, and a word combination. How email works. Requesting delivery of the e-mail by accessing an ETS central management server that provides a service for delivering an e-mail by searching a database for a valid e-mail account corresponding to an e-mail address that is recognized as a deleted or non-existent account. A method for remotely managing a client mail server on a network, comprising an ETS client program module, an ETS client monitor program and a send mail program module for monitoring the operation of the ETS client program; The administrator accesses the ETS remote management database program module through the network and inputs a check item including one or a combination of an email sender address, an email recipient address, a subject, a content, an attachment file name, and a combination of words. ; The ETS remote management database program module accessing the ETS central management server monitor program module of the ETS central management server or the ETS client monitor program module of the client mail server and transmitting the check contents through a network; Storing, by the ETS central management server monitor program module or the ETS client monitor program module, a filtering rule containing the check contents in a database E-mail operating method comprising a. The method of claim 15, wherein the manager inputs a check item. An administrator of the ETS central management server accessing and inputting the ETS remote management database program through an ETS management tool running on an administrator terminal E-mail operating method comprising a. The method of claim 15, wherein the manager inputs a check item. An administrator of the client mail server accessing an ETS web server connected to the ETS central management server and a database server on the Internet, and inputting the check item through an administrator login program module running on the ETS web server; E-mail operating method comprising a. The method of claim 15, wherein the method of operating an email is The ETS remote management database program module accesses the ETS client monitor program module of the client mail server and inquires the version of the ETS client program. E-mail operating method comprising more. The method of claim 15, wherein the e-mail operating method is The ETS remote management database program module accessing an ETS client monitor program module of the client mail server and confirming whether the ETS client program is in an active state E-mail operating method comprising more. The method of claim 15, wherein the email management method is The ETS remote management database program module accessing an ETS client monitor program module of the client mail server to download a new version of the ETS client program module; The ETS client monitor program module requesting an ETS client program module to stop receiving e-mail; Sending, by the ETS client program module, an upgrade signal to the ETS client monitor program module; The ETS client monitor program module loading the new version of the ETS client program E-mail operating method comprising more. The method of claim 15, wherein the e-mail operating method is The administrator accessing the ETS remote management database program module and requesting ETS monitor information inquiry; The ETS client monitor program module refers to the history log database, and reports the status of spam mail processing, email virus processing status, total mail sending data, deleted mail processing data, normal mail processing data, spam and email. Transmitting one or a combination of virus registration status data, ETS version information, and ETS operation status data to the ETS remote management database program module; E-mail operating method comprising more. 1. A method of sending an email from a sender's first email address to a recipient's second email address, the method comprising: Confirming, by the first mail server that transmits the sender's e-mail, whether or not the second e-mail address exists to the second mail server of the recipient who receives the e-mail; If the second mail server does not have the second e-mail address, sending the e-mail to a third mail server having a database storing a valid e-mail address of a recipient; And The third mail server reading the effective email address of the recipient from the database and transmitting the email; E-mail operating method comprising a. The method of claim 22, wherein the step of checking whether the second e-mail address is present, Sending, by the first mail server, a protocol for confirming a communication connection with the second mail server to the second mail server; The first mail server transmitting the sender's first e-mail address to the second mail server; And Querying, by the first mail server, whether the second mail server has a second e-mail address of the recipient; E-mail operating method comprising a. 23. The method of claim 22, wherein sending the email to the third mail server is The first mail server transmitting a protocol for confirming a communication connection with the third mail server to the third mail server; The third mail server accepting a communication connection with the first mail server; Sending, by the first mail server, the first e-mail address of the sender to the third mail server; And Transmitting, by the first mail server, an e-mail that the sender wants to send to the receiver to the third mail server; E-mail system operating method comprising a. The method of claim 22, wherein the third mail server sends the e-mail to the recipient. Reading a third e-mail address of a valid recipient to whom the e-mail is to be sent in a predetermined method from a database storing the valid account of the recipient; And Transmitting, by the third mail server, the e-mail to a fourth mail server managing the third e-mail address of the recipient; E-mail operating method comprising a. 23. The method of claim 22, wherein the transmitting of the e-mail by the third mail server comprises communication of the e-mail with one or a combination of voice mail, text mailbox, fax, wireless communication, pager, and short message service. E-mail operating method comprising the step of transmitting using a medium. Confirming, by the first mail server that transmits the e-mail, whether the first e-mail address of the recipient exists in the second mail server that receives the e-mail; If the second mail server does not have the first e-mail address, the first mail server reads the second e-mail address of the recipient in a predetermined method from a database storing a valid e-mail address related to the recipient. step; Confirming the existence of the second e-mail address of the recipient in a third mail server managing the second e-mail address of the recipient; And If the third mail server has a recipient's second email address, sending the email; E-mail operating method comprising a. In the e-mail system for sending and receiving e-mail over the network, A first mail server managing a first e-mail address of a sender who sends the e-mail; A second mail server for managing a second e-mail address of a recipient who receives the e-mail; If the second e-mail address is recognized as an account that does not exist, a valid e-mail address associated with a second e-mail address is read from a database at the request of the first mail server, and the e-mail is sent to the valid e-mail address. 3rd mail server for sending mail E-mail system comprising a. In the e-mail system for sending and receiving e-mail over the network, A first mail server having a database for storing valid e-mail address information of a recipient who receives the e-mail, and reading effective e-mail address information of the recipient from the database in a predetermined manner and transmitting the e-mail; ; A second mail server for receiving the e-mail E-mail system comprising a. Confirming, by the first mail server of the first station that transmits the e-mail, whether or not the recipient's e-mail address is present in a second mail server outside the first station that receives the e-mail; If the second mail server does not have the recipient e-mail address, sending the e-mail to a third mail server of a first station having a recipient valid e-mail address; If the third mail server of the first station does not have a valid email address of the recipient, sending a command to a fourth mail server of the second station to find the valid email address of the recipient; And A fourth mail server of a second station having a valid e-mail address of the recipient sends the e-mail to the valid e-mail address; E-mail operating method comprising a. 31. The method of claim 30, wherein sending a command to a fourth mail server of the second station to find a valid email address of the recipient, Requesting a communication connection to a fourth mail server existing in a plurality of countries outside the first country; And Requesting a fourth mail server residing in a plurality of countries outside of the first country to retrieve a valid email address of the recipient from a database E-mail operating method comprising a. In the e-mail system for sending and receiving e-mail over the network, A first mail server of a first station having an e-mail address account of a sender who sends the e-mail; A second mail server having an e-mail address account of a recipient receiving the e-mail; A fourth mail server of a second country having a database for storing recipient effective e-mail address account information and reading the effective e-mail address account of the recipient from the database in a predetermined manner and transmitting the e-mail; E-mail system comprising a. 29. The method of claim 22 or 28, wherein the second e-mail address is any one of, or a combination of, an account that is currently deleted or does not exist, an account composed of emoticons, an e-mail address containing Korean or country-specific special characters. How to operate e-mail, including. The email address of claim 27, wherein the first email address includes one or a combination of an account that is currently deleted or does not exist, an account composed of emoticons, an email address containing Korean or country-specific special characters, or a combination thereof. Operating method. 29. The method of claim 22, 27, or 28 wherein the third mail server sends the e-mail. Adding advertisement contents at the top or bottom of the message of the e-mail and transmitting the advertisement contents; E-mail operating method comprising a.