CN105681174A - Mail sending protection method and device - Google Patents
Mail sending protection method and device Download PDFInfo
- Publication number
- CN105681174A CN105681174A CN201610157947.2A CN201610157947A CN105681174A CN 105681174 A CN105681174 A CN 105681174A CN 201610157947 A CN201610157947 A CN 201610157947A CN 105681174 A CN105681174 A CN 105681174A
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- CN
- China
- Prior art keywords
- mailbox
- data packet
- credit
- package
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/568—Storing data temporarily at an intermediate stage, e.g. caching
Abstract
The invention discloses a mail sending protection method and a device, the method comprises the steps: step1) a data packet sent form a mail client is intercepted, and data packet caching is performed on a mail adopting Smtp protocol; step2) the data packet is analyzed, if an inbox is a credit extension mail box or an uncredit extension mail box can be judged according to the inbox address field, and different package list queues are cached and formed; step3) an attachment in the credit extension mail box can be decoded according to preset rules, an attachment in the uncredit extension mail box is unchanged, and a new data package is formed; and step4) the new data package is pushed to the inbox.
Description
Technical field
The invention belongs to internet security technical field, particularly relate to a kind of Email attachment sending method and device.
Background technology
In the anti-leakage security burner management of document of current enterprise, transparent encryption and sandbox two schemes have obtained market test and have had the solution of relative maturity. Solving, local document is anti-divulges a secret on direction, both schemes are respectively arranged with quality and all achieve relatively perfect effect, but Email attachment is anti-divulge a secret in, both schemes are all without proposing total solution, so Email attachment is prevented divulging a secret and is an independent technical scheme and is increasingly being attention. Certainly control Mail Clients simply or browser can only send cryptograph files and can accomplish that adnexa is prevented divulging a secret, but what be clearly present that everyone receives is all the problem of ciphertext, and demand is sent to the encryption that specific user is referred to as not encrypting of credit mail and is sent to other people often, as same envelope mail be sent to boss and other people, other people is cryptographic attachment, and boss's is expressly.
The technology that current transparent manufacturer provides typically uses ApiHook technology Hook Mail Clients (such as foxmail, outlook, and Netease's lightning postal etc.) socket function, analyze Mail Clients, analyze the transmission packet of mail, mail transmission is transmitted typically by general mail protocol smtp agreement, procedure identification can extract the mailbox of target after going out smtp agreement, if it find that target mailbox is credit mailbox, then analyze in this smtp agreement and whether have the adnexa being already encrypted, if had, after adnexa is decrypted, it is sent to credit mailbox.
Current scheme to some extent solves the problem that Email attachment is prevented divulging a secret, but in the use scene of reality, operate very complicated: Current protocols work when recipient list only has credit mailbox or only has non-credit mailbox is good, and more commonly a mail is sent to many people, wherein namely there is credit mailbox, have again non-credit mailbox, then scheme can not be compatible.
Summary of the invention
The technical problem to be solved is to provide a kind of new mail document transmission method.
This invention address that the technical scheme that above-mentioned technical problem is taked is as follows:
A kind of mail sends guard method, and the method includes:
Step 1) intercept and capture the data packet coming from Mail Clients transmission, and the mail taking Smtp agreement is carried out the buffer memory of data packet;
Step 2) resolve described data packet, judge whether addressee mailbox is credit mailbox and non-credit mailbox according to inbox address field, buffer memory also forms different package list queues;
Step 3) it is decrypted according to the adnexa that rule is credit mailbox preset, the adnexa of non-credit mailbox is not altered, and forms new data packet;
Step 4) data packet pushed to addressee mailbox.
Preferably, step 1) in, specifically include: mail package Mail Clients sent by the send function of APIHooksocket, recv function, closesocket function is intercepted and captured.
Preferably, step 1) in, specifically include following sub-step:
Step 11), mail package Mail Clients sent by the send function of APIHooksocket, recv function, closesocket function is intercepted and captured, and identifies whether the agreement of current mail is Smtp agreement simultaneously;
Step 12), after recognizing Smtp agreement, set up data with socket for key and map;
Step 13), all data that the socket that mapping is hit sends are analyzed, and extract critical field;
Step 14), the list of data packet is carried out buffer memory, all of data packet that the socke that the content of buffer memory includes mapping sends.
Preferably, described sub-step 13) in, described critical field includes:
From field, which defines transmission mailbox; Rcpt field, which defines reception mailbox; Data field, which defines Mail Contents, including adnexa; End field, the Smtp that its mark one is complete is sent completely.
Preferably, described sub-step 14) in, the list of data packet is carried out buffer memory, specifically includes:
Data field in data packet starts buffer memory when sending, and after the Data field of mail is sent completely, the Data field of buffer memory is resolved, and is extracted by Email attachment, writes independent file.
Preferably, described step 2) in, specifically include following sub-step:
21) resolve inbox address field, if there is multiple different types of addressee mailboxes, then will change the address of first mailbox into first different types of mailbox;
22) address of replacement is joined in the package list of buffer memory, be consequently formed credit and two package list queues of non-credit.
Preferably, in sub-step 22) in, as after replacing, the size of package changes, the size then changed according to deciphering rear attachment calculates after deciphering package in the skew of package list, then the file replaced by one by one by the skew inverted inserting calculated, with this, adnexa after deciphering is inserted into position accurately, it is achieved the replacement of bag file.
Preferably, described step 3) in, it is decrypted according to the adnexa that default rule is credit mailbox, specifically includes:
Judge the coded format of Email attachment, perform different operations according to different coded formats;
Wherein, if the adnexa of base64 coding, first Email attachment being carried out base64 decoding, then more decoded adnexa is decrypted process, the Email attachment after process carries out base64 coding again; The direct encryption and decryption of adnexa of 7bit coding processes.
A kind of mail sends protection device, and this device includes:
Package interception unit, comes from, for intercepting and capturing, the data packet that Mail Clients sends, and the mail taking Smtp agreement carries out the buffer memory of data packet;
Packet processing unit, is used for resolving described data packet, judges whether addressee mailbox is credit mailbox and non-credit mailbox according to inbox address field, and buffer memory also forms different package list queues;
Package encryption/decryption element, for being decrypted according to the adnexa that rule is credit mailbox preset, the adnexa of non-credit mailbox is not altered, and forms new data packet;
Package retransmission unit, for pushing to addressee mailbox by data packet.
Preferably, described package interception unit is intercepted and captured with the mail package that Mail Clients is received and dispatched by the send function of APIHooksocket, recv function, closesocket function.
This programme has been greatly improved on the basis that adnexa is prevented divulging a secret ensure that: can support that an envelope mail is sent simultaneously to credit mailbox and non-credit mailbox, and credit mailbox is it is seen that cryptographic attachment but not credit mailbox are it is seen that cryptographic attachment.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from description, or understand by implementing the present invention. The purpose of the present invention and other advantages can be realized by structure specifically noted in the description write, claims and accompanying drawing and be obtained.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is described in detail, so that the above-mentioned advantage of the present invention is definitely. Wherein,
Fig. 1 is the schematic flow sheet of prior art;
Fig. 2 is the schematic flow sheet that mail of the present invention sends guard method;
Fig. 3 is the structural representation that mail of the present invention sends protection device.
Detailed description of the invention
Describing embodiments of the present invention in detail below with reference to drawings and Examples, to the present invention, how application technology means solve technical problem whereby, and the process that realizes reaching technique effect can fully understand and implement according to this. As long as it should be noted that do not constitute conflict, each embodiment in the present invention and each feature in each embodiment can be combined with each other, and the technical scheme formed is all within protection scope of the present invention.
Wherein, english abbreviation and technical term to the present invention relates to make an explanation.
Wherein, smtp protocol: Simple Mail Transfer protocol, it is based on a kind of application layer protocol of tcp/ip agreement, it is exactly generally this agreement walked that our normally used Mail Clients sends mail.
APIHOOK:apihook technology is a kind of for changing the API technology performing result and obtaining API execution parameter.
Email attachment is anti-divulges a secret: the adnexa sent for mail does the anti-protection of divulging a secret of document, as cryptograph files can not be sent to appointment user.
Embodiment one:
As depicted in figs. 1 and 2, a kind of mail sends guard method, and the method includes:
Step 1) intercept and capture the data packet coming from Mail Clients transmission, and the mail taking Smtp agreement is carried out the buffer memory of data packet;
Step 2) resolve described data packet, judge whether addressee mailbox is credit mailbox and non-credit mailbox according to inbox address field, buffer memory also forms different package list queues;
Step 3) it is decrypted according to the adnexa that rule is credit mailbox preset, the adnexa of non-credit mailbox is not altered, and forms new data packet;
Step 4) data packet pushed to addressee mailbox.
Wherein, this invention takes after such scheme, it is possible to an envelope mail is sent simultaneously to credit mailbox and non-credit mailbox, and credit mailbox is it is seen that cryptographic attachment but not credit mailbox are it is seen that cryptographic attachment.
Embodiment two:
Specifically, step 1) in, mail package Mail Clients sent based on the send function of APIHooksocket, recv function, closesocket function is intercepted and captured, specifically:
Including following sub-step:
Step 11), mail package Mail Clients sent by the send function of APIHooksocket, recv function, closesocket function is intercepted and captured, and identifies whether the agreement of current mail is Smtp agreement simultaneously;
Step 12), after recognizing Smtp agreement, set up data with socket for key and map;
Step 13), all data that the socket that mapping is hit sends are analyzed, and extract critical field, and wherein, this critical field is mainly From field, which defines transmission mailbox; Rcpt field, which defines reception mailbox; Data field, which defines Mail Contents, including adnexa; End field, the Smtp that its mark one is complete is sent completely.
Step 14), the list of data packet is carried out buffer memory, all of data packet that the socke that the content of buffer memory includes mapping sends.
Embodiment three:
Hereinafter embodiment one and embodiment two being carried out overall description, wherein, the enforcement step of the present invention mainly includes following four steps:
Step 1) intercepting and capturing of Mail Clients transceiver network package are realized by APIHook technology.
Step 2) parsing to Smtp agreement, divide different queue according to addressee mailbox.
Step 3) resolve Email attachment to independent file, and carry out encryption and decryption according to rule.
Step 4) the mail package of buffer memory is pushed again.
Wherein, technology realizes there are four key points:
One is the caching process of package list, and two is the division by the non-credit queue of credit of the addressee mailbox, and three is the encryption and decryption of adnexa, and four is the repeating transmission of buffer memory package list.
Describe each step in detail as follows:
One. the buffer memory of package list:
1). by the mode of APIHook, Mail Clients is sent the package received and be collected, we the Hook send function of socket, recv function, closesocket function.
2). not all package is required for carrying out buffer memory, it is necessary first to whether the agreement identifying currently transmitted mail is Smtp agreement, is identified by EHLO mark.
3). after recognizing the mark of Smtp, set up data with socket for key and map.
4). all data that the socket that mapping is hit sends are analyzed, and extract the field that we are concerned about.
5). while analytical data, the list of data packet is carried out buffer memory, all of network package that the socke that the content of buffer memory includes mapping sends.
6). the field that we are concerned about mainly has: From field (transmission mailbox), Rcpt field (reception mailbox), Data field (Mail Contents, including adnexa), End field (Smtp that mark one is complete is sent completely).
7). need data to be directed in file when receiving Data section, because containing adnexa in Data section, the volume of adnexa may be relatively larger, only could adnexa be processed in the data having received Data section.
8). when Mail Clients calls closesocket, data destroying corresponding for this socket is fallen.
Two. the division of the queue of addressee mailbox:
1). resolve the inbox address field in Smtp agreement, if there is multiple different types of addressee mailboxes into, mailboxes different from first type are changed the address of first mailbox.
Such as, addressee mailbox originally is
A:32424234242qq.com; B:lousp126.com; Wherein, a mailbox is credit to c:dsong126.com, and b mailbox is credit, and c mailbox is non-credit, and amended email address list has reformed into a:32424234242qq.com; B:lousp126.com; C:32424234242qq.com
2). needing when carrying out email address replacement to add the address that is replaced in the package list of buffer memory, so, addressee email address is just divided into two queues by credit and non-credit, such as we for this example can be divided into
Credit queue: 32424234242qq.com;Lousp126.com; 32424234242qq.com
Non-credit queue: dsong126.com
Certainly, it is possible that the email address in a queue repeats after division, but this problem is the transmission without influence on mail.
3). after it should be noted that replacement, the size of package may change, because the length of email address is likely to different, for this situation, it would be desirable to processing accordingly in the send function of Hook.
Three. the encryption and decryption of Email attachment:
1). time Email attachment is relatively larger, one package cannot not send completely, therefore we need Email attachment is carried out buffer memory, the proper opportunity of buffer memory is to carry out when the Data section of Smtp agreement sends, and carries out next step process after the complete adnexa of buffer memory again.
2). after the Data section of mail is sent completely, the Data field of buffer memory being resolved, if there being adnexa to need, by the adnexa extraction process of mail, to write independent file, the encryption and decryption process for adnexa is prepared.
3). the coded format of current mail adnexa mainly has base64 and 7bit two kinds, if Email attachment is first carried out base64 decoding by our needs of adnexa that base64 encodes, then more decoded adnexa is decrypted process, Email attachment after process carries out base64 coding again, and the direct encryption and decryption of adnexa of 7bit coding processes.
4). just Email attachment can be decrypted process after having decoded, first identify which adnexa through encryption, then use decryption interface that Email attachment is decrypted process.
5). we need the adnexa after by deciphering to be written back in package list, it should be noted that, it is different through the size of adnexa of deciphering with the adnexa size of original encryption, it would be desirable to the size changed according to deciphering rear attachment calculates after deciphering package accurately in the skew of package list.
Four. resending of buffer memory mail.
1). the unusual key on opportunity that buffer memory mail sends, send time we first recv after the Data section of Smtp agreement is sent completely is invoked, because being now that Smtp is sent completely a complete mail.
2). the mail of buffer memory is really the list of a transmitting-receiving package, simulate, when sending, the process that Mail Clients sends first completely, need to send and just send, need to receive package and just distribute the reception that enough relief areas carry out data, allow mail server that we are resend the behavior that Activity recognition is Mail Clients in a word.
Compared with prior art, this programme mainly has following 2 advantages:
1. couple Email Sender and e-mail recipient are transparent, need not repartition who be credit mailbox who be non-credit mailbox.
2. accomplished real transparent, and " transparent encryption " has had very strong affinity, it is easy to formed complete total solution.
Embodiment four:
Corresponding with above method embodiment, present invention also offers a kind of mail and send protection device, as it is shown on figure 3, this device includes:
Package interception unit, comes from, for intercepting and capturing, the data packet that Mail Clients sends, and the mail taking Smtp agreement carries out the buffer memory of data packet;
Packet processing unit, is used for resolving described data packet, judges whether addressee mailbox is credit mailbox and non-credit mailbox according to inbox address field, and buffer memory also forms different package list queues;
Package encryption/decryption element, for being decrypted according to the adnexa that rule is credit mailbox preset, the adnexa of non-credit mailbox is not altered, and forms new data packet;
Package retransmission unit, for pushing to addressee mailbox by data packet.
It should be noted that, for said method embodiment, in order to be briefly described, therefore it is all expressed as a series of combination of actions, but those skilled in the art should know, the application is not by the restriction of described sequence of movement, because according to the application, some step can adopt other orders or carry out simultaneously. Secondly, those skilled in the art also should know, embodiment described in this description belongs to preferred embodiment, necessary to involved action and module not necessarily the application.
Those skilled in the art are it should be appreciated that embodiments herein can be provided as method, system or computer program. Therefore, the application can adopt the form of complete hardware embodiment, complete software implementation or the embodiment in conjunction with software and hardware aspect.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, it is not limited to the present invention, although the present invention being described in detail with reference to previous embodiment, for a person skilled in the art, technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature carries out equivalent replacement. All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (10)
1. a mail sends guard method, it is characterised in that the method includes:
Step 1) intercept and capture the data packet coming from Mail Clients transmission, and the mail taking Smtp agreement is carried out the buffer memory of data packet;
Step 2) resolve described data packet, judge whether addressee mailbox is credit mailbox and non-credit mailbox according to inbox address field, buffer memory also forms different package list queues;
Step 3) it is decrypted according to the adnexa that rule is credit mailbox preset, the adnexa of non-credit mailbox is not altered, and forms new data packet;
Step 4) data packet pushed to addressee mailbox.
2. mail according to claim 1 sends guard method; it is characterized in that; step 1) in, specifically include: mail package Mail Clients sent by the send function of APIHooksocket, recv function, closesocket function is intercepted and captured.
3. mail according to claim 1 sends guard method, it is characterised in that step 1) in, specifically include following sub-step:
Step 11), mail package Mail Clients sent by the send function of APIHooksocket, recv function, closesocket function is intercepted and captured, and identifies whether the agreement of current mail is Smtp agreement simultaneously;
Step 12), after recognizing Smtp agreement, set up data with socket for key and map;
Step 13), all data that the socket that mapping is hit sends are analyzed, and extract critical field;
Step 14), the list of data packet is carried out buffer memory, all of data packet that the socke that the content of buffer memory includes mapping sends.
4. mail according to claim 4 sends guard method, it is characterised in that described sub-step 13) in, described critical field includes:
From field, which defines transmission mailbox; Rcpt field, which defines reception mailbox; Data field, which defines Mail Contents, including adnexa; End field, the Smtp that its mark one is complete is sent completely.
5. mail according to claim 3 sends guard method, it is characterised in that described sub-step 14) in, the list of data packet is carried out buffer memory, specifically includes:
Data field in data packet starts buffer memory when sending, and after the Data field of mail is sent completely, the Data field of buffer memory is resolved, and is extracted by Email attachment, writes independent file.
6. mail according to claim 1 sends guard method, it is characterised in that described step 2) in, specifically include following sub-step:
21) resolve inbox address field, if there is multiple different types of addressee mailboxes, then will change the address of first mailbox into first different types of mailbox;
22) address of replacement is joined in the package list of buffer memory, be consequently formed credit and two package list queues of non-credit.
7. mail according to claim 6 sends guard method; it is characterized in that; in sub-step 22) in; as after replacing, the size of package changes; the size then changed according to deciphering rear attachment calculates after deciphering package in the skew of package list; then the file replaced by one by one by the skew inverted inserting calculated, with this, adnexa after deciphering is inserted into position accurately, it is achieved the replacement of bag file.
8. mail according to claim 1 sends guard method, it is characterised in that described step 3) in, it is decrypted according to the adnexa that default rule is credit mailbox, specifically includes:
Judge the coded format of Email attachment, perform different operations according to different coded formats;
Wherein, if the adnexa of base64 coding, first Email attachment being carried out base64 decoding, then more decoded adnexa is decrypted process, the Email attachment after process carries out base64 coding again; The direct encryption and decryption of adnexa of 7bit coding processes.
9. a mail sends protection device, it is characterised in that this device includes:
Package interception unit, comes from, for intercepting and capturing, the data packet that Mail Clients sends, and the mail taking Smtp agreement carries out the buffer memory of data packet;
Packet processing unit, is used for resolving described data packet, judges whether addressee mailbox is credit mailbox and non-credit mailbox according to inbox address field, and buffer memory also forms different package list queues;
Package encryption/decryption element, for being decrypted according to the adnexa that rule is credit mailbox preset, the adnexa of non-credit mailbox is not altered, and forms new data packet;
Package retransmission unit, for pushing to addressee mailbox by data packet.
10. mail according to claim 9 sends protection device, it is characterised in that described package interception unit is intercepted and captured with the mail package that Mail Clients is received and dispatched by the send function of APIHooksocket, recv function, closesocket function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610157947.2A CN105681174A (en) | 2016-03-18 | 2016-03-18 | Mail sending protection method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610157947.2A CN105681174A (en) | 2016-03-18 | 2016-03-18 | Mail sending protection method and device |
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| Publication Number | Publication Date |
|---|---|
| CN105681174A true CN105681174A (en) | 2016-06-15 |
Family
ID=56311051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610157947.2A Pending CN105681174A (en) | 2016-03-18 | 2016-03-18 | Mail sending protection method and device |
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| CN (1) | CN105681174A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113839950A (en) * | 2021-09-27 | 2021-12-24 | 厦门天锐科技股份有限公司 | Mail approval method and system based on terminal mail SMTP protocol |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7548952B2 (en) * | 2002-05-31 | 2009-06-16 | International Business Machines Corporation | Method of sending an email to a plurality of recipients with selective treatment of attached files |
| CN101572678A (en) * | 2008-04-30 | 2009-11-04 | 北京明朝万达科技有限公司 | Mail attachment transparent privacy control method |
| CN104023028A (en) * | 2014-06-19 | 2014-09-03 | 江苏威盾网络科技有限公司 | Anti-eavesdrop method based on WEB E-mails |
| CN105099896A (en) * | 2015-09-18 | 2015-11-25 | 上海上讯信息技术股份有限公司 | Mail transmission method and equipment used for mail transmission |
-
2016
- 2016-03-18 CN CN201610157947.2A patent/CN105681174A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7548952B2 (en) * | 2002-05-31 | 2009-06-16 | International Business Machines Corporation | Method of sending an email to a plurality of recipients with selective treatment of attached files |
| CN101572678A (en) * | 2008-04-30 | 2009-11-04 | 北京明朝万达科技有限公司 | Mail attachment transparent privacy control method |
| CN104023028A (en) * | 2014-06-19 | 2014-09-03 | 江苏威盾网络科技有限公司 | Anti-eavesdrop method based on WEB E-mails |
| CN105099896A (en) * | 2015-09-18 | 2015-11-25 | 上海上讯信息技术股份有限公司 | Mail transmission method and equipment used for mail transmission |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113839950A (en) * | 2021-09-27 | 2021-12-24 | 厦门天锐科技股份有限公司 | Mail approval method and system based on terminal mail SMTP protocol |
| CN113839950B (en) * | 2021-09-27 | 2023-06-27 | 厦门天锐科技股份有限公司 | Mail approval method and system based on terminal mail SMTP protocol |
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Application publication date: 20160615 |