JP2004242199A - Mail managing method, program, and device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make an originator to give up his/her intention of transmitting junk mails by charging the originator for an accounting load to massive transmission of the junk mails. <P>SOLUTION: A candidate determining unit 24 is designed to analyze received mails, and to determine the mails which have all same content and exceed a predetermined number as candidates of the junk mails. A distribution processing unit 26 is designed to check individual confirmation of the originator of the candidates of the junk mails and charging condition when the mails are determined as the junk mails. When the conformation is accepted, the distribution processing unit is designed to distribute the candidates of the junk mails, and to delete the candidates of the junk mails when the conformation can not be accepted. A check processing unit 28 is designed to check a receiver about distribution of the candidates of the junk mails, to make an accounting effective to the originator when the mails are determined as the junk mails, and to release the accounting to the originator when the mails are determined as not the junk mails. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mail management method, a program, and a device for managing electronic mail transmitted through the Internet, and more particularly to a mail management method, a program, and a device for suppressing a large amount of unsolicited junk mail.
[0002]
[Prior art]
E-mails used on the Internet or mobile phones can easily send the same content to a large number of destinations. For this reason, users and Internet providers have suffered a great deal of inconvenience due to the large amount of e-mail transmissions that attempted to advertise or disrupt the Internet system.
[0003]
Conventional spam rejection methods include a method of determining a keyword that suppresses distribution by judging that it is spam that violates public order and morals when the mail contains a specific keyword, or by registering the spam in advance by the recipient. A method of determining and suppressing the distribution is known.
[0004]
[Patent Document 1]
JP-A-2002-73492
[Patent Document 2]
JP-A-2002-94547
[Patent Document 3]
JP-A-2002-190904
[Patent Document 4]
Japanese Patent Application No. 2001-201323
[0005]
[Problems to be solved by the invention]
However, conventional methods for repelling unsolicited e-mails by keyword judgment and pre-registration are all problems because they become an itachigogo between an unsolicited application and a new type of unsolicited e-mail that tries to avoid this, and are not effective deterrent measures. .
[0006]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a mail management method, a program, and a device, which impose a charging burden on mass transmission of spam mails, thereby eliminating the intention to send spam mails to a sender.
[0007]
[Means for Solving the Problems]
The present invention provides a mail management method. This email management method,
A candidate determining unit that analyzes the received mail and determines mail having the same content and a predetermined number of mails or more as a spam mail candidate;
A distribution processing unit for confirming the identity of the sender of the spam mail candidate and the conditional charging for spam mail, and distributing the spam mail candidate only when consent is obtained,
A confirmation processing unit that confirms with the recipient about the distribution of the spam mail candidate, and when it is confirmed that the mail is spam, a confirmation step of validating the billing for the sender;
It is characterized by having.
[0008]
Therefore, according to the present invention, an e-mail having a large number of destinations from the same sender is determined to be a junk e-mail candidate, and the e-mail is distributed with the confirmation of the identity of the sender and the consent of the conditional charging for charging when the junk e-mail is junk. However, if it is confirmed by the recipient's judgment that the mail is unsolicited mail, a large amount of unsolicited mail is charged.
[0009]
With this mechanism, mass senders of spam receive financial risks, and they discourage senders from sending e-mails with the same content to large numbers of destinations, which has been easy to do so far. Can be suppressed.
[0010]
Also, even if a large amount of unsolicited e-mails are sent due to spoofing of the sender, the identity of the sender is confirmed based on the determination result of the unsolicited e-mail, but the unsolicited e-mail candidate is not delivered because the identity cannot be confirmed, Spam mails due to spoofing can be eliminated.
[0011]
Here, in the candidate determination step, the received mail is accumulated for a certain period of time, the newly received mail is compared with the stored mail, and if the match is at least a certain ratio, it is determined that the mail has the same content. This makes it possible to reliably determine a large amount of unsolicited spam mail having the same content as that of the sender only with a different destination without determining a keyword or the like.
[0012]
In the candidate determination step, the received mail is compressed and stored for a certain period of time, and the newly received mail is compressed and compared with the stored compressed mail. By compressing and comparing the received e-mails as described above, the storage capacity can be reduced, and it is possible to appropriately cope with a case where a large amount of unsolicited e-mails is received in a short time.
[0013]
In the candidate determination step, the received mail is irreversibly compressed so that it cannot be restored. Due to this irreversible compression, the stored mail cannot be restored and is used only for comparing and judging the unsolicited mail, thereby preventing access by a third party and ensuring the confidentiality of the mail contents.
[0014]
In the candidate determination step, the newly received mail is compared with a pre-registered mail in which the valid mail is registered in advance, and when the mail matches at a certain ratio or more, the mail is determined as a valid mail. By such pre-registration of valid mails, a large number of destination mails of the same sender, which are not spam mails, are determined to be spam mails, and the mechanism of the present invention avoids the problem of being delivered as a spam mail candidate with conditional charging.
[0015]
In the confirmation step, when the recipient identifies the mail as junk mail, the mail is stored as junk mail, and in response to this, the candidate judgment step compares the newly received mail with the stored junk mail stored in advance. If they match at a certain rate or higher, it is determined to be a junk mail candidate. For this reason, if a user identifies a spam candidate as spam, the spam mail is accumulated, and after that, it is determined as a spam candidate even if it is not a mass destination mail by the same sender, and the identity is confirmed. In addition, distribution by conditional charging is performed, and unsolicited e-mail can be reliably suppressed.
[0016]
In the delivery step, if the charging mode is pre-charging, the sender is charged and then the spam candidate mail is delivered, and if not, the charging is returned to the sender. In the confirmation step, when the billing mode is post-accounting, the sender is charged when the receiver confirms the unsolicited e-mail.
[0017]
The present invention provides a mail management program. This program runs on a computer that builds a mail server,
A candidate judging step of analyzing mails received within a fixed time and determining mails having the same content and a predetermined number of mails or more as spam mail candidates;
A delivery step of confirming the billing with the sender of the spam candidate, distributing the spam candidate if consent is obtained, and discarding the spam candidate if consent is not obtained;
A confirmation step of confirming with the recipient that the spam candidate has been delivered, enabling billing for the sender if the spam is confirmed, and canceling the billing of the sender if the spam is not confirmed;
Is executed.
[0018]
The present invention provides a mail server device. The mail server device analyzes mails received within a certain period of time, and determines mails having the same content and a predetermined number of mails or more as spam mail candidates. A candidate judging unit, a delivery processing unit that confirms billing to the sender of the spam mail candidate, distributes the spam mail candidate when consent is obtained, and discards the spam mail candidate when consent is not obtained, A confirmation processing unit for confirming to the recipient with respect to the distribution of the spam mail candidate, enabling billing for the sender if it is confirmed as spam, and canceling the billing of the sender if it is confirmed that it is not spam; It is characterized by having.
[0019]
The details of the program and the mail server device of the present invention are basically the same as those of the mail management method.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is an explanatory diagram of an Internet mail environment to which the mail management method of the present invention is applied.
[0021]
In FIG. 1, in the Internet mail environment, a mail environment by a provider A and a provider B is taken as an example. The provider A has a mail server 10, and the mail server 10 has a junk mail management provided by the present invention. A part 12 is provided.
[0022]
A client 16 subscribing to the provider A is connected to the mail server 10 via the Internet 14. Further, the mail server 10 is connected to a mail server 18 of another provider B via the Internet 14. A client 20 subscribing to the provider B is connected to the mail server 18 of the provider B via the Internet 14.
[0023]
The junk e-mail management unit 12 provided in the mail server 10 according to the present invention, when receiving an e-mail transmitted from the client 16 belonging to the provider A or the client 20 belonging to the provider B, by the same sender. Judgment as to whether or not it is a mass destination e-mail, if it is a mass destination e-mail by the same sender, judge as a junk e-mail candidate, confirm the identity of the sender and conditional charging, and junk e-mail if consent is obtained The candidate is delivered to the destination, and if consent is not obtained, it is regarded as spam and discarded.
[0024]
FIG. 2 is a block diagram of the mail server 10 of the provider A of FIG. 1 having the functional configuration of the present invention. In FIG. 2, the mail server 10 includes a junk mail management unit 12 and a mail processing unit 22. The mail processing unit 22 includes an SMTP server unit that performs a transmission function and a POP server unit that performs a mail reception function in order to transmit and receive electronic mail to and from a mailer on the client 16 side.
[0025]
The junk mail management unit 12 provided by the present invention includes a candidate determination unit 24, a distribution processing unit 26, and a confirmation processing unit 28. The junk mail management unit 12 is provided with a compressed accumulation file 30, a pre-registration file 32, and an accumulation junk mail file.
[0026]
The candidate determining unit 24 analyzes the received mails and determines that the mails having the same content and a predetermined number of mails or more are spam mail candidates. More specifically, the candidate determination unit 24 irreversibly compresses the mail received by the mail processing unit 22 and stores it in the compressed storage file 30 for a certain period of time, for example, for one minute. Is compared with the compressed mail stored for one minute, and when both match at a certain ratio or more, it is determined that the mail has the same content. When the mail having the same content is a predetermined number N or more, Then, the newly received mail is determined as a spam mail candidate.
[0027]
The distribution processing unit 26 confirms the identity of the sender of the spam mail candidate determined by the candidate determination unit 24 and the conditional charging for the spam mail, and addresses the spam mail candidate if consent is obtained. And if the consent is not obtained, discard the spam mail candidate without distributing it.
[0028]
The confirmation processing unit 28 confirms whether or not the recipient of the spam mail distribution is spam mail. If the spam mail is confirmed, the billing to the sender of the spam mail candidate is validated. If confirmed, the charge of the caller is released. There are two forms of charging for the caller: pre-charging and post-charging. In the pre-charging, charging is performed at the time of distributing the spam mail candidate, and if it is not the spam mail, the charging is returned. On the other hand, in the case of post-payment, a spam mail candidate is distributed and billed when the mail is confirmed as spam.
[0029]
Further, when the confirmation processing unit 28 confirms that the junk mail is a junk mail from the recipient, the junk mail is registered in the accumulated junk mail file 34, and is compared with the newly received mail by the candidate determination unit 24. Used for judgment.
[0030]
Further, according to the present invention, a valid mail desired by the user can be pre-registered in order to start judging that the mail is spam, and this pre-registration is stored in the pre-registration file 32 and the candidate judgment is performed. The unit 24 refers to the pre-registration file 32 when judging a newly accepted mail, and if it is a pre-registered mail of the pre-registration file 32, the mail is immediately delivered as a valid mail.
[0031]
The mail server 10 of FIG. 2 is realized by hardware resources of a computer as shown in FIG. 3, for example.
[0032]
In the computer shown in FIG. 3, a RAM 102, a hard disk controller (software) 104, a floppy disk driver (software) 110, a CD-ROM driver (software) 114, a mouse controller 118, a keyboard controller 122, and a display controller 126 are provided on a bus 101 of a CPU 100. , A communication board 130 is connected.
[0033]
The hard disk controller 104 is connected to the hard disk drive 106 and loads an application program for executing a mail management process for suppressing unsolicited e-mail according to the present invention. And executed by the CPU 100.
[0034]
A floppy disk drive (hardware) 112 is connected to the floppy disk driver 110, and can read / write to a floppy disk (R). A CD drive (hardware) 116 is connected to the CD-ROM driver 114, and can read data and programs stored in the CD.
[0035]
The mouse controller 118 transmits an input operation of the mouse 120 to the CPU 100. The keyboard controller 122 transmits an input operation of the keyboard 124 to the CPU 100. The display controller 126 performs display on the display unit 128. The communication board 130 uses a communication line 132 including wireless, and communicates with another computer or server, and further with a mobile phone via a network such as the Internet.
[0036]
FIG. 4 is an explanatory diagram of the compressed storage file 30 of FIG. 2, and shows a state of storing a large number of destination mails of the same sender transmitted simultaneously. The compression storage file 30 of FIG. 4 includes, as registration items, a transmission time, a mail sender, a mail destination, a mail size, a mail content, and a flag indicating that the mail is spam.
[0037]
Among them, the contents of the received e-mail are compressed, for example, on a line-by-line basis, and irreversible compression is used as the compression method, which cannot be restored. Is prohibited, and the confidentiality of the mail contents of the stored mail is guaranteed.
[0038]
Regarding the stored contents of the compressed storage file 30 in FIG. 4, the sending time and the mail sender are all the same, the mail destinations are different, the mail size is the same, and the mail contents are completely complete in this case. Match. Therefore, for example, when the determination value N of the number of mails having the same content is set to, for example, N = 5, all the mails received at the simultaneous transmission time are determined to be spam mail candidates.
[0039]
FIG. 5 shows another storage state of the compressed storage file 30 of FIG. 2, and shows a storage state of mass destination mail of the same sender transmitted at different times. That is, the mail senders are the same but the sending times are different. Of course, the mail destinations are different, and the mail size is the same.
[0040]
In this case, the contents of the compressed mails are different from the perfect match shown in FIG. Thus, in the present invention, in order to determine the correspondingly transmitted unsolicited e-mail, a part of the contents of which is different from the above is determined. ing.
[0041]
FIG. 6 shows another accumulation state of the compressed accumulation file 30 of FIG. 2, and in this example, shows an accumulation state of mass mailings by an impersonator. That is, in this case, the mail senders are all different, but when the contents of the compressed mails are compared, they match each other at a predetermined n% or more, and the number of matching mails is more than a predetermined value N or more. If so, it is determined to be a spam mail candidate. In this case, since the first and third mails have already been determined to be unsolicited mails by checking with the user, the unsolicited mail determination flag 36 is registered.
[0042]
In any of the cases of FIGS. 4, 5, and 6, in the present invention, it is determined that the junk mail is a junk mail candidate, and consent is obtained by confirming the identity of the sender of the junk mail candidate and confirming the conditional charging. In this case, the mail is delivered, and if the user confirms the unsolicited e-mail, the billing becomes valid.
[0043]
FIG. 7 is a sample explanatory diagram of a billing confirmation mail to the sender of a spam mail candidate. The billing confirmation mail 38 indicates a billing condition for billing on the condition that it is judged as a spam mail candidate and the spam mail, and transmits the spam mail candidate only when consent is obtained. Describes a point. In response to this confirmation, the sender checks the reply of consent or disagreement and returns it.
[0044]
FIG. 8 is a sample explanatory diagram of a spam confirmation mail performed when a spam mail candidate is delivered to a recipient.
[0045]
FIG. 8A shows a spam confirmation mail 40 that is delivered as another mail in response to the distribution of the spam mail candidate. Asking for a reply. Further, it shows that when replying as a junk mail, the same junk mail is not transmitted to the user thereafter.
[0046]
FIG. 8B is an explanatory diagram of a sample of a harassment confirmation mail that is distributed by embedding the harassment confirmation mail unit 44 in the distribution mail 42 that is a harassment candidate mail. In this case, the reply destination of the harassment confirmation mail unit 44 is shown. An e-mail address is described. By clicking this e-mail address, a reply can be made to the mail server in the case of unsolicited e-mail.
[0047]
FIG. 9 is a flowchart of the mail management process according to the present invention, and the processing procedure of this flowchart simultaneously represents the processing procedure of the program of the junk mail management unit 12 in the mail server 10 of FIG.
[0048]
In FIG. 9, when a new mail is received in step S1, the process proceeds to step S2, and a junk mail determination process is performed. If it is determined in step S3 that the junk e-mail is a junk e-mail candidate as a result of the junk e-mail determination process, in step S4, the identity of the sender and the confirmation of the conditional charging are checked.
[0049]
In response to this confirmation, if consent of the caller is obtained in step S5, it is checked in step S6 whether the charging mode is pre-charging, and if it is pre-charging, the process proceeds to step S7, and the caller is charged at this time. . If it is post-mortem, step S7 is skipped.
[0050]
Subsequently, in step S8, the mail that has become the unwanted mail candidate is delivered to the destination. Subsequently, in step S9, the junk mail e-mail 40 as shown in FIG. Of course, as shown in FIG. 8B, when distributing the spam mail candidate in step S8, the spam confirmation mail section 44 may be embedded and distributed.
[0051]
If there is no reply from the recipient in step S10, the mail is compressed as a valid mail in step S11 and stored in the compressed storage file 30 in FIG. 2, and if the charging mode is pre-charging in step S12, The charge for the sender performed in step S7 is returned, and the process as a valid mail is completed.
[0052]
On the other hand, if a reply of the unsolicited mail is received from the recipient in step S10, the process proceeds to step S14, where the mail content is irreversibly compressed and stored as unsolicited mail in the stored unsolicited mail file 34 of FIG. It should be noted that the storage as junk mail does not use the dedicated storage junk mail file 34 as shown in FIG. 2 but sets a junk mail determination flag 36 indicating that it is junk mail as shown in the compressed storage file 30 in FIG. It may be realized by registering.
[0053]
Subsequently, if the charging mode is the pre-charging in step S15, since the caller has already been charged in step S7, the process is terminated as it is. On the other hand, if the accounting form is post-accounting, the process proceeds to step S16, and the sender is charged at this stage.
[0054]
If it is determined in step S3 that the junk e-mail is not a junk e-mail candidate as a result of the junk e-mail determination process, the process proceeds to step S17, and the e-mail is directly delivered to a destination as a valid e-mail.
[0055]
FIG. 10 is a flowchart showing details of the unsolicited e-mail determination process in step S2 of FIG. The unsolicited e-mail determination process in FIG. 10 compares the newly received e-mail in step S1 with the pre-registered e-mail registered in the pre-registration file 32 in FIG. In step S9, the mail is determined to be a valid mail, and the process returns to FIG. 9 to perform mail distribution.
[0056]
If the received mail does not match the pre-registered mail in step S2, the process proceeds to step S3, where the received mail is compared with the stored junk mail. If the received mail matches the stored junk mail in step S4, the process proceeds to step S8. It is immediately determined to be a spam mail candidate.
[0057]
If it does not match the stored junk mail in step S4, the process proceeds to step S5, in which the content of the received mail is compressed and compared with the compressed mail stored for a certain period of time stored in the compressed storage file 30. If a match with the compressed stored mail is obtained in S6, it is further checked in step S7 whether or not the number of matching mails is equal to or greater than a predetermined value N. Judge as a mail candidate.
[0058]
Of course, in the comparison between the newly received received mail and the pre-registered mail, the stored junk mail, and the stored compressed mail in steps S2, S4, and S5, if the mail contents match at least a predetermined N%, the mail is determined to be the same mail. Is done. Both pre-registered e-mails and annoying accumulated e-mails are subjected to irreversible compression with respect to e-mail contents.
[0059]
FIG. 11 is a flowchart of the pre-registration processing in the present invention. In this pre-registration process, the pre-registration request from the user received in step S1 is taken out, and in step S2, a confirmation e-mail is sent to the sender to confirm the charge for the pre-registration cost. If there is a consent of the caller in step S3, it is checked in step S4 whether or not the charging mode is pre-charging. If the charging is pre-charging, the process proceeds to step S5. The mail content is compressed and registered in the pre-registration file 32.
[0060]
The present invention is to perform a preliminary registration process for such valid mails in advance, so that when a large number of destination mails are sent from the same sender for advertisement or the like, the mails are determined to be spam mail candidates and the present invention is to suppress the spam mails. Can be prevented from being performed.
[0061]
The present invention includes appropriate modifications that do not impair the objects and advantages thereof, and is not limited by the numerical values shown in the above embodiments.
Here, the features of the present invention are summarized and listed as follows.
[0062]
(Note)
(Appendix 1)
A candidate determining unit that analyzes the received mail and determines mail having the same content and a predetermined number of mails or more as a spam mail candidate;
A delivery processing unit for confirming the identity of the sender of the spam mail candidate and the conditional charging in the case of the spam mail, and distributing the spam mail candidate only when consent is obtained;
A confirmation processing unit that confirms with the recipient about the distribution of the spam mail candidate, and when it is confirmed that the mail is spam, a confirmation step of validating the billing for the sender;
A mail management method using a mail server, comprising: (1)
[0063]
(Appendix 2)
In the mail management method using the mail server according to Supplementary Note 1, in the candidate determination step, the received mail is accumulated for a certain period of time, the newly received mail is compared with the accumulated mail, and when the match is at least a certain ratio. A mail management method by a mail server, wherein the mail is determined to be the same. (2)
[0064]
(Appendix 3)
In the mail management method using the mail server according to Supplementary Note 2, in the candidate determination step, the received mail is compressed and accumulated for a certain period of time, and the newly received mail is compressed and then compared with the compressed mail accumulated. A mail management method using a mail server.
[0065]
(Appendix 4)
The mail management method using a mail server according to claim 3, wherein in the candidate determination step, the received mail is irreversibly compressed so that the received mail cannot be restored.
[0066]
(Appendix 5)
In the mail management method using the mail server described in the appendix 1, the candidate determination step includes comparing a newly received mail with a pre-registered mail registered in advance and valid when a predetermined ratio or more matches. A mail management method by a mail server, which is determined to be a mail.
[0067]
(Appendix 6)
In the mail management method by the mail server described in Appendix 1,
The confirming step, if the recipient is confirmed as spam, accumulate as spam,
In the candidate determining step, a mail received by a mail server is compared with a newly-received spam mail stored in advance, and when the mail matches at a certain ratio or more, the mail is judged as a spam mail candidate.
[0068]
(Appendix 7)
In the mail management method by the mail server described in Appendix 1,
In the delivery step, when the billing form is advance billing, the billing is delivered to the caller, and then the spam candidate mail is delivered.
The e-mail management method using a mail server, wherein the confirmation step returns the charge to a sender if the e-mail is not spam.
[0069]
(Appendix 8)
In the mail management method using the mail server according to Supplementary Note 1, in the case where the charging mode is post-charging, the sender is charged when the receiver confirms the unsolicited e-mail, if the charging mode is post-charging. Mail management method by the mail server to do.
[0070]
(Appendix 9)
On the computer that builds the mail server,
A candidate judging step of analyzing mails received within a fixed time and determining mails having the same content and a predetermined number of mails or more as spam mail candidates;
Check the identity of the sender of the spam mail candidate and the conditional charge for spam mail, deliver the spam mail candidate if consent is obtained, and send the spam mail candidate if consent is not obtained A delivery step to discard the
A confirmation step of confirming to the recipient with respect to the distribution of the spam mail candidate, enabling billing for the sender if it is confirmed as spam, and canceling the billing of the sender if it is confirmed that the mail is not spam. When,
A program characterized by executing (3)
[0071]
(Appendix 10)
A candidate judging unit that analyzes mail received within a certain period of time and determines mails having the same content and a predetermined number of mails or more as spam mail candidates;
Check the identity of the sender of the spam mail candidate and the conditional charge for spam mail, deliver the spam mail candidate if consent is obtained, and send the spam mail candidate if consent is not obtained A delivery processing unit that discards the
A confirmation process for confirming to the recipient with respect to the distribution of the spam mail candidate, and validating the billing for the sender if it is confirmed as spam, and canceling the billing of the sender if it is confirmed that the mail is not spam. Department and
A mail server device comprising:
[0072]
【The invention's effect】
As described above, according to the present invention, a mail having a large number of destination mails from the same sender is determined to be a spam mail candidate, the identity of the sender is confirmed, and a conditional charging is performed when the mail is spam. Is distributed with the consent of the recipient, and if it is confirmed by the recipient that the message is spam, the spam is charged. For this reason, senders who try to send large amounts of spam will be at a financial risk. And reduce the enormous damage to users and Internet providers.
[0073]
In addition, since e-mails received over a certain period of time are accumulated and compared with newly received e-mails, spam e-mail candidates are determined. Judgment as a junk mail candidate by comparing with the contents of the e-mail that is sent, and by performing conditional charging, puts a large financial burden on large numbers of junk e-mail senders and discourages them from sending junk e-mail be able to.
[0074]
Furthermore, by incorporating the mail management process of the present invention into the mail server of the provider, it is possible to efficiently reduce the distribution of unsolicited mail to users who have contracted with the provider, thereby providing the mechanism of the present invention. It is possible to differentiate from a provider using a mail server that does not have a mail server, and increase users' support for a provider having a mail server that employs the mechanism of the present invention.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of an Internet mail environment to which the present invention is applied;
FIG. 2 is a block diagram of a mail server having a functional configuration according to the present invention.
FIG. 3 is an explanatory diagram of a hardware environment of a computer to which the mail server of FIG. 2 is applied;
FIG. 4 is an explanatory diagram of a compressed storage file storing a large number of destination mails of the same sender transmitted simultaneously.
FIG. 5 is an explanatory diagram of a compressed storage file storing a large number of destination mails of the same sender transmitted at different times.
FIG. 6 is an explanatory diagram of a compressed storage file storing a large number of destination mails of an impersonator;
FIG. 7 is a sample explanatory diagram of a billing confirmation mail to a sender of a spam mail candidate.
FIG. 8 is an explanatory diagram of a sample of a nuisance confirmation mail to a user
FIG. 9 is a flowchart of a mail management process according to the present invention.
FIG. 10 is a flowchart showing details of the unsolicited mail determination processing of FIG. 9;
FIG. 11 is a flowchart of a pre-registration process according to the present invention.
[Explanation of symbols]
10, 18: mail server
12: Spam mail management department
14: Internet
16, 20: Client
22: Mail processing unit
24: candidate determination unit
26: Distribution processing unit
28: Confirmation processing unit
30: Compressed storage file
32: Pre-registration file
34: accumulated spam mail file
36: Junk mail judgment flag
38: Billing confirmation mail
40: E-mail confirmation
42: Delivery mail
44: Junk confirmation mail section

Claims (3)

A candidate determining unit that analyzes the received mail and determines mail having the same content and a predetermined number of mails or more as a spam mail candidate;
A delivery processing unit for confirming the identity of the sender of the spam mail candidate and the conditional charging in the case of the spam mail, and distributing the spam mail candidate only when consent is obtained;
A confirmation processing unit for confirming to the recipient with respect to the distribution of the unsolicited e-mail candidate and confirming that the unsolicited e-mail is valid for the sender when the e-mail is confirmed as unsolicited e-mail. Email management method. 2. The method according to claim 1, wherein in the candidate determining step, the received mail is stored for a certain period of time, and the newly received mail is compared with the stored mail, and a match is made at a certain ratio or more. A mail management method by a mail server, wherein a mail is determined to have the same content in the case. On the computer that builds the mail server,
A candidate judging step of analyzing mails received within a fixed time and determining mails having the same content and a predetermined number of mails or more as spam mail candidates;
Check the identity of the sender of the spam mail candidate and the conditional charge for spam mail, deliver the spam mail candidate if consent is obtained, and send the spam mail candidate if consent is not obtained A delivery step to discard the
A confirmation step of confirming to the recipient with respect to the distribution of the spam mail candidate, enabling billing for the sender if it is confirmed as spam, and canceling the billing of the sender if it is confirmed that the mail is not spam. When,
A program characterized by executing

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