CN101035098A - Method for the mobile terminal to reject the spam via the query - Google Patents
Method for the mobile terminal to reject the spam via the query Download PDFInfo
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- CN101035098A CN101035098A CNA2007100986612A CN200710098661A CN101035098A CN 101035098 A CN101035098 A CN 101035098A CN A2007100986612 A CNA2007100986612 A CN A2007100986612A CN 200710098661 A CN200710098661 A CN 200710098661A CN 101035098 A CN101035098 A CN 101035098A
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Abstract
A method based on question of mobile terminals to refuse to accept spam. Mobile terminals connected by the mail server receives head information of the mail first to collect sender address; If the address is unfamiliar , mobile terminals send an e-mail question to question the sender automatically, and put the head of the mail information and addresses to areas of confirmed list and to be ascertained; When the returned mail response answered correctly, it downloaded from the mail server integrity of the mail and sent to the address to the White List, in order to receive the user's mail directly next time; If the answer is wrong, the head Mail information will be send to garbage bins, and put address in blacklist; If the address of the sender address is a non-stranger, according to the addresses in the respective white list or blacklist to download the mail or put the head mail information into litter bins. The method is simple, high degree of automation and low cost, and save time and flow costs, easy to implement and promote.
Description
Technical field
The present invention relates to a kind of method based on the portable terminal rejection spam of addressing inquires to, exactly, relate to a kind of automatic identification that is used for portable terminal and filter spam, for the implementation method that the Email User of portable terminal is exempted the spam harassing and wrecking, belong to mobile communication and e-mail technique field.
Background technology
Email is the basic service in the various services in the Internet, carries out information interchange by Email and has the characteristics convenient, fast, that expense is cheap.According to statistics, in the Internet service of the most frequent use, have to surpass 90% user and selected E-mail service, be in the first place of Internet service.Along with Internet service the developing rapidly of the whole world, being on the increase of number of netizens, as most important in the Internet service, most basic E-mail service, its scale also constantly enlarges in the whole world; Email is applied in daily life and the work day by day continually.Yet for various reasons, the quantity of various spams is also increasing rapidly, waste people's time and network traffics.Spam (English is referred to as Spam) is exactly that those are self-invited, the user does not wish to receive and do not subscribe to yet, but filled in the Email of mailbox by force by the people, the content of spam mainly is the commercial propaganda data in panoramic commercial advertisement, product introduction, what is called road of getting rich or the like.Spam is once issued a lot of people, can transmit a lot of copies on the internet simultaneously.
Because portable terminal possesses at any time, everywhere, the convenient performance carried, along with the fast development of portable terminal, increasing people begins receiving E-mail on portable terminal.Like this, just make spam particularly outstanding to the influence and the harm of portable terminal.This is because the speed of surfing the Internet of portable terminal is very limited, collects a large amount of spams and loses time very much; Moreover mobile terminal Internet access all will be charged usually, and expensive, collects a large amount of spams and will produce appreciable traffic fee usefulness.Therefore, how disposal of refuse mail preferably on portable terminal has become the hot issue that those skilled in the art are badly in need of solving.
At present, the treatment technology of spam can be divided into two big classes, and a kind of is to handle in client, is about to sort out earlier after Email receives fully, puts into inbox and dustbin more respectively; Another kind is to handle on mail server, is promptly discerned, is filtered by mail server.The former is mainly manually finished by the user, and formality is loaded down with trivial details.The latter carries out corresponding software operation flow process, gigantic project by operator.
Now, the recognition technology of spam mainly contains two classes: a kind of is the structure black and white lists, and it needs mobile phone users to receive mail earlier, again mail is carried out artificial judgment, then in hand filling establishment and the adding black and white lists.Whole process not only manually participates in many, and timeliness is slow, normally uses the influence of portable terminal big to the user; And this method as usual will be for receiving surf time and the payment flow expense that spam takies portable terminal.Another kind is to utilize methods such as probability statistics, machine learning to discern mail, if surpass certain default threshold values, then thinks spam.This method and technology requires high, realizes that difficulty is big, and the time of study or training is long; Especially this method is difficult to solve for different individualities, the problem that the definition of spam is incomplete same.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of method based on the portable terminal rejection spam of addressing inquires to, this method can be in today that spam increases day by day, on portable terminal, adopt the automation means to avoid receiving spam, its operating process is fairly simple, realize easily and popularization, and the software module of using this method on portable terminal mounting cost and implementation process in need the expenses of surfing Internet paid all cheaper, make the user both avoid the puzzlement of SPAM, save time again and traffic fee usefulness.
In order to achieve the above object, the invention provides a kind of method based on the portable terminal rejection spam of addressing inquires to, it is characterized in that: portable terminal connects mail server, collects the header information of new mail earlier, extracts the sender address from this mail header; If this address is strange address, portable terminal automatically replies and sends envelope inquiry mail, promptly a relevant recipient's of random choose simple problem is addressed inquires to the sender from address inquires to exam pool, and respectively this mail header information is sent into district to be confirmed and this address is added list to be determined; The acknowledge mail that returns subsequently when this strange address is answered when correct, just from this mail of the complete download of mail server, and sends into inbox, simultaneously this address is added white list, addresses inquires to and directly downloads so that need not when this user sends mail next time; If erroneous answers then moves into dustbin with mail header information from district to be confirmed, select whether to receive this spam for the user is manual, and this address is added blacklist; If the strange address of right and wrong, sender address then is positioned at white list according to this address or blacklist carries out following processing respectively: download this mail or mail header information is moved into dustbin.
Described Email Sender address is divided into four classes: white list-mobile phone users is ready to receive the address list of its mail, blacklist-mobile phone users is rejected the address list of its mail, list to be confirmed-be used to preserve has sent the addresses of items of mail tabulation of addressing inquires to mail but also not obtaining replying, the address that strange address-mobile phone users was not write to each other with it originally to it.
The relevant recipient's who inquires to the sender in the described inquiry mail simple problem comprises: name, sex, the range of age, residence, place work unit or school.
Mobile phone users can be with in the disposable adding white list in all addresses in the address list.
Described method comprises following operating procedure:
(1) portable terminal connects mail server, obtains the header information of new mail, obtains the Email Sender address;
(2) judge whether the Email Sender address is arranged in white list,, then collect this mail, put into inbox if be positioned at white list, and to the arrival of this mail of user prompt; Otherwise order is carried out subsequent operation;
(3) judge whether the Email Sender address is arranged in blacklist,, then delete this mail if be positioned at blacklist: mail header information is moved into dustbin, and not to the arrival of this mail of user prompt; Otherwise order is carried out subsequent operation;
(4) judge whether the Email Sender address is arranged in list to be confirmed,, then send an envelope and address inquires to mail, require the Email Sender in replied mail, to answer this challenge from this Email Sender of trend if be not positioned at wherein; Simultaneously this Email Sender address is added list to be determined, and this mail header information is sent into district to be confirmed, and not to the arrival of this mail of user prompt, the end operation flow process; Otherwise order is carried out subsequent operation;
(5) get the mail after sender's the replied mail, the answer of therefrom extracting challenge is compared with the correct option of this problem of its storage again, judges whether this answer is correct; If answer correctly, order is carried out subsequent operation; Otherwise, redirect execution in step (7);
(6) this Email Sender address is changed over to white list from list to be determined, collect in the district to be confirmed mail with this address correlation to mail server again, put into inbox, and to the arrival of user prompt mail; The end operation flow process;
(7) this Email Sender address is changed over to blacklist from list to be determined, will put dustbin into the mail header information of this address correlation in the district to be confirmed again, and not to the arrival of this mail of user prompt; The end operation flow process.
Challenge in the described step (5) is a picked at random from the challenge storehouse that the user sets, and writes down the numbering of this challenge simultaneously, so as when receiving acknowledge mail, to judge answer whether correct.
Described method requires portable terminal to possess the challenge of being provided with and answer thereof and it is carried out the inquiry exam pool editting function of additions and deletions, modification, so that the user carries out personalized setting.
Priority operating sequence between the step of described method (2), (3), (4) can be adjusted, and promptly operating sequence does not have mandatory provisions between them.
The present invention is a kind of method based on the portable terminal rejection spam of addressing inquires to, this method provides a kind of technological means that can in time, effectively find malicious user and reject its spam for mobile phone users, and take corresponding measure that these malicious users and spam are in time handled, both purified the mobile communications network environment, guarantee the safe, unimpeded of proper communication, can on portable terminal, the expense expense (only collecting the mail header of spam) with minimum discern spam again, for the user saves time and traffic fee usefulness.
The black and white lists that relates to the Email Sender among the present invention is quite simple, and in implementation process, portable terminal has the self study performance, along with mobile subscriber's passing of service time, among the present invention self study to black and white lists will progressively be tending towards accurate, perfect.Therefore, with respect to content aware conventional method, the discrimination height of spam of the present invention can not misrepresented deliberately and fail to report.Moreover the inventive method both can adopt JAVA, C
++, or other Languages be compiled into application program, make mobile terminal operating system embedded, installed software module separately; Also can directly develop on operating system, being developed into needs special application program of installing, so that promote the use of on new system mobile phone or existing mobile phone respectively.Therefore, the present invention be a kind of very practical, effectively reject the method for spam, have good application prospects.
Description of drawings
Fig. 1 is the classification schematic diagram of addresses of items of mail on the portable terminal.
Fig. 2 is the classification of mail schematic diagram on the portable terminal.
Fig. 3 is the method operating procedure flow diagram that the present invention is based on the portable terminal rejection spam of inquiry.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
The present invention is based on following basis: before the transmission mail was to the recipient, the sender should know relevant recipient's basic condition, such as name, sex or age etc.; If the sender does not understand recipient's basic condition, then this mail is a spam.The inventive method is to utilize to address inquires to the sender and construct white list, blacklist automatically by its answer correctness, and normally uses in the process of mail the user, accumulates accurate black and white lists automatically.And the present invention adopts the head that mails on terminal, obtain send the address after, judge its whether spam, if spam does not then receive mail and reduces invalid traffic.
Referring to Fig. 1, the present invention at first is divided into four classes with the Email Sender address of new mail: white list, blacklist, list to be confirmed and strange address.Wherein, white list is the address list that mobile phone users is ready to receive its mail, blacklist is the address list that mobile phone users is unwilling to receive its mail, and list to be confirmed is to preserve to have sent the addresses of items of mail tabulation of addressing inquires to mail but also not obtaining responding to it; Any address of writing to each other then for not taking place with the recipient before this communication in strange address.Portable terminal of the present invention possesses following function: disposable with mobile terminal address thin in all clauses and subclauses add in the white list, manually add particular address in various lists, even can be directly connected to the webserver and download known black and white lists etc.
Referring to Fig. 2, portable terminal inbox of the present invention is subdivided into following three classes: inbox, dustbin and district to be confirmed.Portable terminal of the present invention will be put inbox into from the mail of white list, at this moment the arrival of this mail of terminal regular prompt user; Just put dustbin into from the mail header information of blacklist, this moment, terminal was not pointed out the user, but allowed the user initiatively certain mail is checked or collected to dustbin.To put district to be confirmed into from the mail header information of location fremdly, this moment, terminal was not pointed out the user yet, but allowed the user initiatively district to be confirmed to be checked.For mail from list to be confirmed, if in its mail matter topics or text, correctly answered challenge, then collect this mail to inbox, and the regular prompt user; If erroneous answers is not then collected this mail, this mail header information enters dustbin, and this address pipes off.
In addition, the present invention is provided with the inquiry exam pool, wherein stores several challenge, is used for strange address is sent the inquiry mail.The present invention is set by the user its answer earlier before using, such as my name, and my sex, my the range of age, I live and where wait, and the user also can increase new problem and answer voluntarily.
The inventive method is: portable terminal connects mail server earlier, collects the header information of new mail, extracts the sender address from this mail header; If this address is strange address, portable terminal automatically replies and sends envelope inquiry mail, promptly a relevant recipient's of random choose simple problem is addressed inquires to the sender from address inquires to exam pool, and respectively the header information of this mail is sent into district to be confirmed and this address is added list to be determined; The acknowledge mail that returns subsequently when this strange address is answered when correct, just from this mail of the complete download of mail server, and sends into inbox, simultaneously this address is added white list, addresses inquires to and directly downloads so that need not when this user sends mail next time; If erroneous answers then moves into dustbin with mail header information from district to be confirmed, select whether to receive this spam for the user is manual, and this address is added blacklist; If the strange address of right and wrong, sender address then is positioned at white list according to this address or blacklist carries out following processing respectively: download this mail or mail header information is moved into dustbin.After portable terminal uses the inventive method, will in ongoing mail contact, set up true, perfect black and white lists gradually, thereby make the user exempt interference fully from spam.In the inquiry process of the present invention,, bring extra operation hardly for mail reception person; For the Email Sender, just increased the inquiry process when communicating by letter for the first time.
Referring to Fig. 3, illustrate that intactly portable terminal of the present invention receives the concrete operations step of an envelope new mail:
100 steps: portable terminal connects mail server, obtains the header information of new mail, obtains the Email Sender address.
101 steps: judge whether the Email Sender address is arranged in white list,, enter 102 steps if be positioned at white list; Otherwise, enter 201 steps.
102 steps: collect this mail to inbox, and press the arrival of this mail of normal mode prompting user, flow process finishes.
201 steps: judge whether the Email Sender is arranged in blacklist.If be positioned at blacklist, enter 202 steps; Otherwise, enter 301 steps.
202 steps: delete this mail: this mail header information is entered dustbin, and do not point out the arrival of this mail of user, flow process finishes.
301 steps: judge whether the Email Sender is arranged in list to be confirmed,, enter 302 steps if be not positioned at wherein; Otherwise, enter 401 steps.
302 steps: automatically send an envelope to this Email Sender and address inquires to mail, this mail requires Email Sender's problem that replies an interrogation in mail.This problem is a picked at random from the inquiry exam pool that the user sets, and portable terminal writes down the numbering of the challenge that is sent simultaneously, so that judge whether to answer correct when receiving acknowledge mail by this.
303 steps: this Email Sender is added list to be determined.
304 steps: this mail header information is moved into district to be confirmed, and do not point out the arrival of this mail of user, flow process finishes.
401 steps: from replied mail, extract the answer of problem, then with 302 steps in the pairing answer of question number of writing down compare, with judge answer whether correct.If answer correctly, enter 402 steps; If erroneous answers enters 501 steps.
402 steps: this Email Sender address is added white list.
403 steps: collect in the district to be confirmed mail with this address correlation to mail server, and put inbox into, by the arrival of this mail of normal mode prompting user, flow process finishes again.
501 steps: this Email Sender is added blacklist.
502 steps: will put dustbin into the mail header information of this address correlation in the district to be confirmed, portable terminal is not pointed out the arrival of this mail of user, and flow process finishes.
The processing sequence of priority each other of above-mentioned 101～102,201～202,301～304 3 serial operating procedures can be adjusted; promptly also can be according to following order: 201～202,101～102,301～304 executable operations; perhaps according to another order: 301～304,101～102,201～202 executable operations; do not influence essence of the present invention and result, all belong to and be encompassed within protection scope of the present invention.
Claims (8)
1, a kind of method based on the portable terminal rejection spam of addressing inquires to, it is characterized in that: portable terminal connects mail server, collects the header information of new mail earlier, extracts the sender address from this mail header; If this address is strange address, portable terminal automatically replies and sends envelope inquiry mail, promptly a relevant recipient's of random choose simple problem is addressed inquires to the sender from address inquires to exam pool, and respectively this mail header information is sent into district to be confirmed and this address is added list to be determined; The acknowledge mail that returns subsequently when this strange address is answered when correct, just from this mail of the complete download of mail server, and sends into inbox, simultaneously this address is added white list, addresses inquires to and directly downloads so that need not when this user sends mail next time; If erroneous answers then moves into dustbin with mail header information from district to be confirmed, select whether to receive this spam for the user is manual, and this address is added blacklist; If the strange address of right and wrong, sender address then is positioned at white list according to this address or blacklist carries out following processing respectively: download this mail or mail header information is moved into dustbin.
2, the method for portable terminal rejection spam according to claim 1, it is characterized in that: described Email Sender address is divided into four classes: white list-mobile phone users is ready to receive the address list of its mail, blacklist-mobile phone users is rejected the address list of its mail, list to be confirmed-be used to preserve has sent the addresses of items of mail tabulation of addressing inquires to mail but also not obtaining replying, the address that strange address-mobile phone users was not write to each other with it originally to it.
3, the method for portable terminal rejection spam according to claim 1, it is characterized in that: the relevant recipient's who inquires to the sender in the described inquiry mail simple problem comprises: name, sex, the range of age, residence, place work unit or school.
4, the method for portable terminal rejection spam according to claim 1, it is characterized in that: mobile phone users can be with in the disposable adding white list in all addresses in the address list.
5, the method for portable terminal rejection spam according to claim 1, it is characterized in that: described method comprises following operating procedure:
(1) portable terminal connects mail server, obtains the header information of new mail, obtains the Email Sender address;
(2) judge whether the Email Sender address is arranged in white list,, then collect this mail, put into inbox if be positioned at white list, and to the arrival of this mail of user prompt; Otherwise order is carried out subsequent operation;
(3) judge whether the Email Sender address is arranged in blacklist,, then delete this mail if be positioned at blacklist: mail header information is moved into dustbin, and not to the arrival of this mail of user prompt; Otherwise order is carried out subsequent operation;
(4) judge whether the Email Sender address is arranged in list to be confirmed,, then send an envelope and address inquires to mail, require the Email Sender in replied mail, to answer this challenge from this Email Sender of trend if do not have; Simultaneously this Email Sender address is added list to be determined, and this mail header information is sent into district to be confirmed, and not to the arrival of this mail of user prompt, the end operation flow process; Otherwise order is carried out subsequent operation;
(5) get the mail after sender's the replied mail, the answer of therefrom extracting challenge is compared with the correct option of this problem of its storage again, judges whether this answer is correct; If answer correctly, order is carried out subsequent operation; Otherwise, redirect execution in step (7);
(6) this Email Sender address is changed over to white list from list to be determined, collect in the district to be confirmed mail with this address correlation to mail server again, put into inbox, and to the arrival of user prompt mail; The end operation flow process;
(7) this Email Sender address is changed over to blacklist from list to be determined, will put dustbin into the mail header information of this address correlation in the district to be confirmed again, and not to the arrival of this mail of user prompt; The end operation flow process.
6, the method for portable terminal rejection spam according to claim 5, it is characterized in that: the challenge in the described step (5) is a picked at random from the challenge storehouse that the user sets, and write down the numbering of this challenge simultaneously so that when receiving acknowledge mail, judge answer whether correct.
7, the method for portable terminal rejection spam according to claim 1 or 5, it is characterized in that: described method requires portable terminal to possess the challenge of being provided with and answer thereof and it is carried out the inquiry exam pool editting function of additions and deletions, modification, so that the user carries out personalized setting.
8, the method for portable terminal rejection spam according to claim 5, it is characterized in that: the priority operating sequence between the step of described method (2), (3), (4) can be adjusted, and promptly operating sequence does not have mandatory provisions between them.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100986612A CN101035098A (en) | 2007-04-24 | 2007-04-24 | Method for the mobile terminal to reject the spam via the query |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100986612A CN101035098A (en) | 2007-04-24 | 2007-04-24 | Method for the mobile terminal to reject the spam via the query |
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| Publication Number | Publication Date |
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| CN101035098A true CN101035098A (en) | 2007-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100986612A Pending CN101035098A (en) | 2007-04-24 | 2007-04-24 | Method for the mobile terminal to reject the spam via the query |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101170829B (en) * | 2007-11-27 | 2010-09-29 | 中兴通讯股份有限公司 | A soft switching system and method for call limit based on black and white list |
| WO2011047571A1 (en) * | 2009-10-23 | 2011-04-28 | 中兴通讯股份有限公司 | Anti-spam method and system |
| CN102172064A (en) * | 2008-10-06 | 2011-08-31 | 日本电气株式会社 | Communication system and communication control method |
| CN101227467B (en) * | 2008-01-08 | 2011-11-30 | 中兴通讯股份有限公司 | Apparatus for managing black list |
| CN101340387B (en) * | 2008-08-12 | 2012-07-04 | 成都市华为赛门铁克科技有限公司 | Method and apparatus for control forwarding data packets |
| CN101771686B (en) * | 2009-12-31 | 2012-10-10 | 卓望数码技术（深圳）有限公司 | Communication method and network adapter |
| US8634318B2 (en) | 2008-10-06 | 2014-01-21 | Nec Corporation | Communication system and communication control method |
| CN104901964A (en) * | 2015-05-28 | 2015-09-09 | 北京邮电大学 | Security monitoring method for protecting cloud system |
| CN105827519A (en) * | 2016-05-24 | 2016-08-03 | 乐视控股（北京）有限公司 | Mail downloading management method and device |
| CN105847123A (en) * | 2016-04-19 | 2016-08-10 | 乐视控股（北京）有限公司 | Spam mail recognition method and device |
| CN106850412A (en) * | 2017-02-23 | 2017-06-13 | 北京二六三企业通信有限公司 | The sending method and device of mail |
| CN109348037A (en) * | 2018-11-28 | 2019-02-15 | 东南大学 | A kind of anti-harassing and wrecking fixed telephone of anti-swindle based on intelligent answer |
| CN110324231A (en) * | 2018-03-29 | 2019-10-11 | 基点资讯股份有限公司 | The non-based reminding method for knowing well Email |
| CN114679426A (en) * | 2022-05-27 | 2022-06-28 | 太平金融科技服务(上海)有限公司深圳分公司 | Mail interception method, device, equipment and storage medium |
| CN115567475A (en) * | 2022-09-27 | 2023-01-03 | 北京二六三企业通信有限公司 | Junk mail identification method, device, equipment and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101170829B (en) * | 2007-11-27 | 2010-09-29 | 中兴通讯股份有限公司 | A soft switching system and method for call limit based on black and white list |
| CN101227467B (en) * | 2008-01-08 | 2011-11-30 | 中兴通讯股份有限公司 | Apparatus for managing black list |
| CN101340387B (en) * | 2008-08-12 | 2012-07-04 | 成都市华为赛门铁克科技有限公司 | Method and apparatus for control forwarding data packets |
| US9131048B2 (en) | 2008-10-06 | 2015-09-08 | Nec Corporation | Communication system and communication control method |
| US8625620B2 (en) | 2008-10-06 | 2014-01-07 | Nec Corporation | Communication system and communication control method for requesting cancellation of registration as bad terminal |
| US8634318B2 (en) | 2008-10-06 | 2014-01-21 | Nec Corporation | Communication system and communication control method |
| CN102172064A (en) * | 2008-10-06 | 2011-08-31 | 日本电气株式会社 | Communication system and communication control method |
| WO2011047571A1 (en) * | 2009-10-23 | 2011-04-28 | 中兴通讯股份有限公司 | Anti-spam method and system |
| CN101771686B (en) * | 2009-12-31 | 2012-10-10 | 卓望数码技术（深圳）有限公司 | Communication method and network adapter |
| CN104901964A (en) * | 2015-05-28 | 2015-09-09 | 北京邮电大学 | Security monitoring method for protecting cloud system |
| CN105847123A (en) * | 2016-04-19 | 2016-08-10 | 乐视控股（北京）有限公司 | Spam mail recognition method and device |
| CN105827519A (en) * | 2016-05-24 | 2016-08-03 | 乐视控股（北京）有限公司 | Mail downloading management method and device |
| CN106850412A (en) * | 2017-02-23 | 2017-06-13 | 北京二六三企业通信有限公司 | The sending method and device of mail |
| CN110324231A (en) * | 2018-03-29 | 2019-10-11 | 基点资讯股份有限公司 | The non-based reminding method for knowing well Email |
| CN109348037A (en) * | 2018-11-28 | 2019-02-15 | 东南大学 | A kind of anti-harassing and wrecking fixed telephone of anti-swindle based on intelligent answer |
| CN114679426A (en) * | 2022-05-27 | 2022-06-28 | 太平金融科技服务(上海)有限公司深圳分公司 | Mail interception method, device, equipment and storage medium |
| CN115567475A (en) * | 2022-09-27 | 2023-01-03 | 北京二六三企业通信有限公司 | Junk mail identification method, device, equipment and storage medium |
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