CN106411690A - Mail control method and device - Google Patents
Mail control method and device Download PDFInfo
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- CN106411690A CN106411690A CN201610272843.6A CN201610272843A CN106411690A CN 106411690 A CN106411690 A CN 106411690A CN 201610272843 A CN201610272843 A CN 201610272843A CN 106411690 A CN106411690 A CN 106411690A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
- H04L51/21—Monitoring or handling of messages
- H04L51/212—Monitoring or handling of messages using filtering or selective blocking
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
- H04L51/42—Mailbox-related aspects, e.g. synchronisation of mailboxes
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Information Transfer Between Computers (AREA)
- Computer And Data Communications (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention provides a mail control method and device. The method is applied to network safety equipment. The method comprises steps of determining a mail meets a preset filtering rule or not when the mail sent by a client is received; caching the mail and performing packet loss when the mail does not meet the preset filtering rule by determination; examining whether the cached mail is legal or not; and forwarding the cached mail to a server when the cached mail is determined legal. The invention can determine legality of the mail through double detection, and prevents forwarding of illegal mails, so that the accuracy of mail filtering is improved further, the illegal mail is prevented from being sent, and the user experience is improved.
Description
Technical field
The present invention relates to communication technical field, more particularly, to a kind of mail control method and device.
Background technology
Email Email is one of most important communication mode in internet, for certified mail communication security it will usually be controlled to mail.One of common mail control mode during filtrating mail, refer to arrange some filtering rules based on user name, sender, content-keyword, attachment content etc., the mail of outgoing is filtered, to the mail blocking processing meeting filtering rule so as to can not normally send.And filtrating mail there is also the possibility of wrong report, it is " XXX " as arranged filtering keys, send the mail that Mail Contents are probably that an envelope publicizes XXX harm, result is erroneously interpreted as an envelope and publicizes the mail of XXX and be blocked, thus leading to the normal transmission of legitimate mail, lead to filtrating mail result inaccurate, the impact normal mail of user sends.
Content of the invention
In view of this, the present invention provides a kind of mail control method and device to solve the inaccurate problem of filtrating mail result in prior art.
Specifically, the present invention is achieved through the following technical solutions：
The present invention provides a kind of mail control method, and methods described is applied to Network Security Device, and methods described includes：
When receiving the mail that client sends, judge whether this mail meets default filtering rule；
When determining that this mail does not meet default filtering rule, packet loss after this mail is cached；
Check whether the mail of caching is legal；
When the mail determining caching is legal, by this email relaying to server.
Further, methods described also includes：
When the mail determining caching is illegal, preserve this mail.
Further, methods described also includes：
When the end mark in this mail is detected, send to server and reset message, make the connection of server disconnection and this Network Security Device, and abandon this mail.
Further, methods described also includes：
Server is replaced to finish receiving message to client feedback, so that client feedback request closing passage message；
When receiving request closing passage message, server is replaced to disconnect path message to client feedback, so that client is disconnected with server.
Further, methods described also includes：
Send to client transmission mail and successfully point out.
Based on identical design, the present invention also provides a kind of mail control device, and described device is applied to Network Security Device, and described device includes：
Filtrating mail unit, for receive client transmission mail when, judge whether this mail meets default filtering rule；
Mail buffer unit, for when determining that this mail does not meet default filtering rule, by packet loss after this mail caching；
Mail inspection unit, whether the mail for checking caching is legal；
Email relaying unit, for when the mail determining caching is legal, by this email relaying to server.
Further, described device also includes：
Mail storage unit, for when the mail determining caching is illegal, preserving this mail.
Further, described device also includes：
First feedback unit, for when the end mark in this mail is detected, sending to server and resetting message, makes the connection of server disconnection and this Network Security Device, and abandons this mail.
Further, described device also includes：
Second feedback unit, for replacing server to finish receiving message to client feedback, so that client feedback request closing passage message；When receiving request closing passage message, server is replaced to disconnect path message to client feedback, so that client is disconnected with server.
Further, described device also includes：
3rd feedback unit, successfully points out for sending to client transmission mail.
As can be seen here, the present invention can by receive client transmission mail, and determine this mail do not meet default filtering rule when by this mail cache after packet loss, and determine caching mail legal when by this email relaying to server.Therefore the present invention can determine the legitimacy of mail it is possible to block the forwarding of illegal mail by secondary detection, and then can improve the accuracy rate of filtrating mail, it is to avoid the transmission of illegal mail, lifts Consumer's Experience.
Brief description
Fig. 1 is a kind of process chart of one of illustrative embodiments of present invention mail control method；
Fig. 2 is the schematic diagram of the mail control system handling process in a kind of illustrative embodiments of the present invention；
Fig. 3 is the interactive schematic diagram of mail control system in a kind of illustrative embodiments of the present invention；
The hardware structure diagram of the mail control device place equipment in a kind of illustrative embodiments of Fig. 4 a present invention；
A kind of building-block of logic of one of illustrative embodiments of Fig. 4 b present invention mail control device.
Specific embodiment
In order to solve the problems, such as prior art, the present invention provides a kind of mail control method and device, can be by the mail receiving client transmission, and determine this mail do not meet default filtering rule when by this mail cache after packet loss, and determine caching mail legal when by this email relaying to server.Therefore the present invention can determine the legitimacy of mail it is possible to block the forwarding of illegal mail by secondary detection, and then can improve the accuracy rate of filtrating mail, it is to avoid the transmission of illegal mail, lifts Consumer's Experience.
Refer to Fig. 1, it is a kind of process chart of one of illustrative embodiments of present invention mail control method, methods described is applied to Network Security Device, described Network Security Device can be provided between server and client, has the network equipment checking and controlling e-mail transmitting function.Methods described includes：
Step 101, receive client transmission mail when, judge whether this mail meets default filtering rule；
In the present embodiment, when Network Security Device receives the mail of client transmission, this mail can be judged based on one or more feature such as sender, addressee, mail header, text, annex according to default filtering rule.In the present embodiment, when this mail meets this filtering rule it is believed that this mail is legal, therefore this mail can be forwarded to server according to the flow process of prior art.
Step 102, determine this mail do not meet when, by this mail cache after packet loss；
When Network Security Device determines that this mail does not meet default filtering rule, it is considered that this mail doubtful for illegal mail, therefore this mail can be buffered in locally, then packet loss process be carried out to this mail, be forwarded directly to server thus stoping and not meeting default filtering rule mail.
Whether the mail that step 103, inspection cache is legal；
Because current filtering rule is only judged according to default key message, for example, when filtering rule is carrying the mail of " XXX " content as illegal mail, the mail that simultaneously also some can be publicity resistance XXX is blocked as illegal mail, therefore leads to it to filter accuracy poor.And the present invention further can be checked to the doubtful illegal mail in caching, such as by modes such as hand inspections, further determine that the legitimacy of this mail, thus improving the accuracy rate of filtrating mail.
Step 104, determine caching mail legal when, by this email relaying to server.
When the mail determining caching is legal it is believed that this mail is legal, and by the email relaying of caching to server.
As can be seen here, the present invention can by receive client transmission mail, and determine this mail do not meet default filtering rule when by this mail cache after packet loss, and determine caching mail legal when by this email relaying to server.Therefore the present invention can determine the legitimacy of mail it is possible to block the forwarding of illegal mail by secondary detection, and then can improve the accuracy rate of filtrating mail, it is to avoid the transmission of illegal mail, lifts Consumer's Experience.
When Network Security Device determine caching mail illegal when, can by caching in this mail be saved in physical disk, carry out illegal mail backup and can be using this mail as the foundation called to account, such that it is able to improve internet security.
In prior art, after mail is intercepted by Network Security Device, the sender of mail can find the situation of mail interception.If Email Sender is blabber, blabber, after learning that disclosure mail is intercepted, can increase the vigilance of blabber, thus being unfavorable for the safe and secret work in later stage.
In order to solve the above problems, improve the level security of mail further, in optional embodiment of the present invention, after Network Security Device determines that this mail is illegal mail, can be in the end mark in this mail is detected, send to server and reset message, so that server disconnects the transmission channel with this Network Security Device when receiving this replacement message, and abandon this mail.Such that it is able to stop that illegal mail sends to server.Then, Network Security Device can also replace server to finish receiving message to client feedback, so that client thinks that this mail has been transmitted, then can ask closing passage message to server feedback；When Network Security Device intercepts the request closing passage message of user end to server transmission, server can be replaced to disconnect path message to client feedback, so that client disconnects the connection of transmission channel with server, such that it is able to stop the illegitimate client continuation illegal mail of transmission.
Further, Network Security Device can also send to client transmission mail and successfully point out, client is made to think that this mail is already sent to server, so that blabber is detectable the situation that disclosure mail is intercepted, such that it is able to improve the level security of network.
For making the objects, technical solutions and advantages of the present invention become more apparent, with reference to Fig. 2, Fig. 3, the program of the present invention is described in further detail.
Refer to Fig. 2, be the schematic diagram of the mail control system handling process in a kind of illustrative embodiments of the present invention.Network Security Device can postpone audit filtering rule, hereinafter referred to as filtering rule based on the feature such as sender, addressee, mail header, text, annex setting mail first.When user uses Mail Clients to send mail to mail server, the mail of transmission can be carried out filtrating mail by this filtering rule by Network Security Device, if hit filtering rule, this mail is intercepted and is cached to buffer area, make mail cannot be sent to internet.Then, Network Security Device can be audited to the mail in buffer area with circular mail auditor, after manual examination and verification, audit the mail passing through and may be considered legitimate mail, legal mail can be re-transmitted to internet afterwards, make this mail reach mail server.And the mail of manual examination and verification failure may be considered illegal mail, therefore this illegal mail will be trapped and be stored in memory block, as the foundation called to account.
Refer to Fig. 3, be the interactive schematic diagram of mail control system in a kind of illustrative embodiments of the present invention.Wherein, Mail Clients is specifically included using the interaction that smtp protocol sends an envelope mail：
First, when Mail Clients receives ready 220 signal of expression of server transmission, Mail Clients sends HELLO order and opens the mail transmission passage between Mail Clients and server；Then, when Mail Clients sends successively for asking the MAIL order of all state tables of reset and buffer area and being used for the RCPT order asking email relaying path, server can be responded when process completes and by 250 message；When client send for request send communications content DATA order to server after, receive server transmission expression start input mail 354 response when, begin through transmission channel transmission Mail Contents.In transmission email process, Network Security Device can filter to mail.If finding illegal mail, this mail can be stoped from being sent to server.
It should be noted that in prior art, Mail Contents need when sending in transmission channel to indicate that Mail Contents end up, complete to represent mail transmission, transmission channel can be disconnected.A fullstop (English punctuate ". ") can only be sent to represent the end of Mail Contents by the last column in Mail Contents in smtp protocol.Therefore in the present embodiment, when determining that mail is illegal, during except intercepting this Mail Contents and carry out storage backup, send request to server when also will send end mark ". " mail is detected and reset the RST message connecting, make server disconnect the connection of transmission channel.Because now server does not receive the message carrying last Mail Contents, then will be considered that this mail sends imperfect, therefore when disconnecting, this Mail Contents data receiving before can be abandoned.For mail client extreme direction, server can will be replaced to client push 250 response message, so that client thinks that server receives complete Mail Contents.After client receives this 250 message, the QUIT order for asking closing transmission passage can be sent.After Network Security Device monitors the QUIT order that client sends, can be again to client push 221 response message, so that after client receives 221 message, connecting the connection of transmission channel.Finally, Network Security Device sends successfully to Mail Clients prompting mail, such that it is able to avoid blabber to find that mail is intercepted.
Below by specific application example, embodiment of the present invention is described in detail.
Assume that pre-set mail matter topics in Network Security Device to comprise " XXX " is filtering rule.When Intranet user A have sent an envelope mail, theme is " publicity XXX is illegal "；User B sends an envelope mail, and theme is " tomorrow has a match "；User C sends an envelope mail, and theme is " XXX, the true, the good and the beautiful carry forward justice ".
When three envelope mails are through Network Security Device, filtered according to default filtering rule respectively.Due to comprising " XXX " in user's A mail, do not comprise " XXX " in user's B mail, comprise " XXX " in user's C mail, then user A mail and user's C mail hit filtering rule, thus user's A mail and user's C mail are carried out packet loss after caching process；User's B mail is miss filtering rule, then normally send to internet, and user's B Mail Clients prompting mail sends successfully.
User's A mail in caching and user's C mail notification mail examination ＆ verification keeper are audited by Network Security Device again, although through examination ＆ verification, auditor finds that user's A mail matter topics contain " XXX ", but belong to normal email, therefore user's A mail can be re-transmitted on internet, and send successfully to user's A Mail Clients prompting mail；Examination ＆ verification user's C mail assert that it is the illegal mail that an envelope advocates XXX, then retain this mail to illegal memory block, to make the foundation called to account, and sends successfully to user's C Mail Clients prompting mail.
Therefore present invention can ensure that legal mail is normally sent to server, illegal mail cannot reach server, and it is persisted backup, can ensure that the user sending illegal mail is detectable the situation that illegal mail is intercepted, thus internet security is greatly improved simultaneously.
Based on identical design, the present invention also provides a kind of mail control device, and this device can be realized by software it is also possible to realize by by way of hardware or software and hardware combining.As a example implemented in software, the mail control device of the present invention, as the device on a logical meaning, is to run to form after computer program instructions corresponding in memory are read by the CPU of its place device.
Refer to Fig. 4 a and Fig. 4 b, be a kind of one of illustrative embodiments of present invention mail control device 400, described device is applied to Network Security Device, the basic running environment of this device includes CPU, memory and other hardware, from logic level, this device 400 includes：
Filtrating mail unit 401, for receive client transmission mail when, judge whether this mail meets default filtering rule；
Mail buffer unit 402, for when determining that this mail does not meet default filtering rule, by packet loss after this mail caching；
Mail inspection unit 403, whether the mail for checking caching is legal；
Email relaying unit 404, for when the mail determining caching is legal, by this email relaying to server.
Optionally, described device also includes：
Mail storage unit 405, for when the mail determining caching is illegal, preserving this mail.
Optionally, described device also includes：
First feedback unit 406, for when the end mark in this mail is detected, sending to server and resetting message, makes the connection of server disconnection and this Network Security Device, and abandons this mail.
Optionally, described device also includes：
Second feedback unit 407, for replacing server to finish receiving message to client feedback, so that client feedback request closing passage message；When receiving request closing passage message, server is replaced to disconnect path message to client feedback, so that client is disconnected with server.
Optionally, described device also includes：
3rd feedback unit 408, successfully points out for sending to client transmission mail.
As can be seen here, the present invention can by receive client transmission mail, and determine this mail do not meet default filtering rule when by this mail cache after packet loss, and determine caching mail legal when by this email relaying to server.Therefore the present invention can determine the legitimacy of mail it is possible to block the forwarding of illegal mail by secondary detection, and then can improve the accuracy rate of filtrating mail, it is to avoid the transmission of illegal mail, lifts Consumer's Experience.
In said apparatus the function of unit and effect realize that process specifically refers in said method corresponding step realize process, will not be described here.
For device embodiment, because it corresponds essentially to embodiment of the method, so the part referring to embodiment of the method illustrates in place of correlation.Device embodiment described above is only schematically, the wherein said unit illustrating as separating component can be or may not be physically separate, as the part that unit shows can be or may not be physical location, may be located at a place, or can also be distributed on multiple NEs.The purpose to realize application scheme for some or all of module therein can be selected according to the actual needs.Those of ordinary skill in the art are not in the case of paying creative work, you can to understand and to implement.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any modification, equivalent substitution and improvement within the spirit and principles in the present invention, done etc., should be included within the scope of protection of the invention.
Claims (10)
1. a kind of mail control method is it is characterised in that methods described is applied to Network Security Device, institute
The method of stating includes：
When receiving the mail that client sends, judge whether this mail meets default filtering rule；
When determining that this mail does not meet default filtering rule, packet loss after this mail is cached；
Check whether the mail of caching is legal；
When the mail determining caching is legal, by this email relaying to server.
2. method according to claim 1 is it is characterised in that methods described also includes：
When the mail determining caching is illegal, preserve this mail.
3. method according to claim 2 is it is characterised in that methods described also includes：
When the end mark in this mail is detected, send to server and reset message, so that server is broken
Open the connection with this Network Security Device, and abandon this mail.
4. method according to claim 3 is it is characterised in that methods described also includes：
Server is replaced to finish receiving message to client feedback, so that client feedback request closing passage
Message；
When receiving request closing passage message, server is replaced to disconnect path message to client feedback,
So that client is disconnected with server.
5. method according to claim 4 is it is characterised in that methods described also includes：
Send to client transmission mail and successfully point out.
6. a kind of mail control device is it is characterised in that described device is applied to Network Security Device, institute
State device to include：
Filtrating mail unit, for receive client transmission mail when, judge whether this mail meets pre-
If filtering rule；
Mail buffer unit, for when determining that this mail does not meet default filtering rule, this mail being delayed
Deposit rear packet loss；
Mail inspection unit, whether the mail for checking caching is legal；
Email relaying unit, for when the mail determining caching is legal, by this email relaying to server.
7. device according to claim 6 is it is characterised in that described device also includes：
Mail storage unit, for when the mail determining caching is illegal, preserving this mail.
8. device according to claim 7 is it is characterised in that described device also includes：
First feedback unit, for when the end mark in this mail is detected, sending weight to server
Put message, make the connection of server disconnection and this Network Security Device, and abandon this mail.
9. device according to claim 8 is it is characterised in that described device also includes：
Second feedback unit, for replacing server to finish receiving message to client feedback, so that client
End feedback request closing passage message；When receiving request closing passage message, replace server to client
End feedback disconnects path message, so that client is disconnected with server.
10. device according to claim 9 is it is characterised in that described device also includes：
3rd feedback unit, successfully points out for sending to client transmission mail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610272843.6A CN106411690A (en) | 2016-04-27 | 2016-04-27 | Mail control method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610272843.6A CN106411690A (en) | 2016-04-27 | 2016-04-27 | Mail control method and device |
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| CN106411690A true CN106411690A (en) | 2017-02-15 |
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| CN201610272843.6A Pending CN106411690A (en) | 2016-04-27 | 2016-04-27 | Mail control method and device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107888484A (en) * | 2017-11-29 | 2018-04-06 | 北京明朝万达科技股份有限公司 | A kind of email processing method and system |
| CN107911277A (en) * | 2017-09-29 | 2018-04-13 | 北京明朝万达科技股份有限公司 | A kind of outgoing mail auditing method and system based on machine learning |
| CN108600081A (en) * | 2018-03-26 | 2018-09-28 | 北京明朝万达科技股份有限公司 | A kind of method and device that mail outgoing achieves, Mail Gateway |
| CN108768820A (en) * | 2018-03-15 | 2018-11-06 | 北京明朝万达科技股份有限公司 | A kind of mail security grading management method and system |
| CN108809813A (en) * | 2018-06-14 | 2018-11-13 | 北京明朝万达科技股份有限公司 | File processing method and system using the mail of anti-data-leakage technology |
| CN109218168A (en) * | 2018-09-26 | 2019-01-15 | 江苏神州信源系统工程有限公司 | The blocking-up method and device of sensitive e-mail messages |
| CN109818920A (en) * | 2018-12-13 | 2019-05-28 | 平安科技（深圳）有限公司 | Mail checking method, device, computer equipment and computer readable storage medium |
| CN116318766A (en) * | 2022-11-10 | 2023-06-23 | 合芯科技有限公司 | E-mail forwarding authentication method, device, computer equipment and storage medium |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107911277A (en) * | 2017-09-29 | 2018-04-13 | 北京明朝万达科技股份有限公司 | A kind of outgoing mail auditing method and system based on machine learning |
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| CN108768820A (en) * | 2018-03-15 | 2018-11-06 | 北京明朝万达科技股份有限公司 | A kind of mail security grading management method and system |
| CN108600081A (en) * | 2018-03-26 | 2018-09-28 | 北京明朝万达科技股份有限公司 | A kind of method and device that mail outgoing achieves, Mail Gateway |
| CN108809813A (en) * | 2018-06-14 | 2018-11-13 | 北京明朝万达科技股份有限公司 | File processing method and system using the mail of anti-data-leakage technology |
| CN109218168A (en) * | 2018-09-26 | 2019-01-15 | 江苏神州信源系统工程有限公司 | The blocking-up method and device of sensitive e-mail messages |
| CN109818920A (en) * | 2018-12-13 | 2019-05-28 | 平安科技（深圳）有限公司 | Mail checking method, device, computer equipment and computer readable storage medium |
| CN109818920B (en) * | 2018-12-13 | 2022-08-30 | 平安科技（深圳）有限公司 | Mail auditing method and device, computer equipment and computer readable storage medium |
| CN116318766A (en) * | 2022-11-10 | 2023-06-23 | 合芯科技有限公司 | E-mail forwarding authentication method, device, computer equipment and storage medium |
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Address after: Binjiang District and Hangzhou city in Zhejiang Province Road 310051 No. 68 in the 6 storey building Applicant after: Hangzhou Dipu Polytron Technologies Inc Address before: Binjiang District and Hangzhou city in Zhejiang Province Road 310051 No. 68 in the 6 storey building Applicant before: Hangzhou Dipu Technology Co., Ltd. |
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