CN116471253A - Mail withdrawal method, system, computing device and storage medium - Google Patents

Abstract

The invention discloses a mail withdrawing method, a system, a computing device and a storage medium, wherein the method is executed in a mail server and comprises the following steps: responding to a withdrawal request of a target mail sent by a sender client, and judging whether the time interval between the sending time and the current time of the target mail exceeds a preset time length or not; if the preset time is not exceeded, returning a receiver selection page of the target mail to the sender client; acquiring one or more pieces of recipient information selected at the recipient selection page; traversing the mailbox folders corresponding to the one or more pieces of receiver information to search target mails from the mailbox folders, and deleting the target mails in the mailbox folders. According to the technical scheme of the invention, the read mail can be withdrawn, and the mail can be withdrawn aiming at partial receivers of the target mail.

Description

Mail withdrawal method, system, computing device and storage medium

Technical Field

The present invention relates to the field of network communications technologies, and in particular, to a mail withdrawal method, a mail withdrawal system, a computing device, and a storage medium.

Background

With the development of the internet, email plays an irreplaceable role in the field of network communication. Moreover, email permeates staff's daily offices with advantages of low cost, fast speed, rich forms, etc. With the increasing frequency of e-mail use, the user's requirements for their functions are increasing, and the user is no longer satisfied that the sent mail is sent only to the recipient, and also wishes to withdraw the sent error mail when some problems are found in the sent mail.

In the prior art, the Exchange enterprise mail server of Microsoft defaults to support the mail withdrawal function, but the mail withdrawal success rate is low, and the condition is limited, and the specific withdrawal condition is as follows: an Exchange mode of Windows outlook is required to be configured for a receiver and a sender; requiring the recipient not to read the withdrawn mail; mail that is required to be withdrawn must be in a default inbox and not redirected to other folders through mailbox rules. It can be seen that the existing mail revocation scheme cannot revoke the read mail, and the revoked mail needs to be in a designated inbox, and cannot support to revoke a part of the recipients of the mail.

Therefore, a mail withdrawing method is required to solve the problems in the above technical solutions.

Disclosure of Invention

To this end, the present invention provides a mail withdrawal method and mail withdrawal system to solve or at least alleviate the above-mentioned problems.

According to an aspect of the present invention, there is provided a mail withdrawal method, executed in a mail server, including: responding to a withdrawal request of a target mail sent by a sender client, and judging whether the time interval between the sending time and the current time of the target mail exceeds a preset time length or not; if the preset time is not exceeded, returning a receiver selection page of the target mail to the sender client; acquiring one or more pieces of recipient information selected at the recipient selection page; traversing the mailbox folders corresponding to the one or more pieces of receiver information to search target mails from the mailbox folders, and deleting the target mails in the mailbox folders.

Optionally, in the mail withdrawal method according to the present invention, further comprising: and acquiring withdrawal reason information input in the receiver selection page, and storing the target mail information and the withdrawal reason information in a correlated manner.

Optionally, in the mail withdraw method according to the present invention, traversing the mailbox folders corresponding to the one or more recipient information to find the target mail from the mailbox folders includes: for each piece of receiver information, judging whether the receiver information contains a group; if the group is included, acquiring a plurality of group member information included in the group; traversing the mailbox folders corresponding to the group member information to search the target mail from the mailbox folders.

Optionally, in the mail withdraw method according to the present invention, traversing mailbox folders corresponding to the one or more recipient information to find a target mail from the mailbox folders, further includes: if the receiver information does not contain the group, the mailbox folder corresponding to the receiver information is directly traversed to search the target mail from the mailbox folder.

Optionally, in the mail withdrawing method according to the present invention, returning the recipient selection page of the target mail to the sender client includes: judging whether the target mail is a mail needing to be withdrawn again; if yes, returning a re-withdrawal page to the sender client, and responding to a re-withdrawal request sent through the re-withdrawal page, and returning a receiver selection page of the target mail to the sender client; if not, the receiver selection page of the target mail is directly returned to the sender client.

Optionally, in the mail withdrawal method according to the present invention, each mail includes a unique mail identification; searching the target mail from the mailbox folder comprises the following steps: acquiring a target mail identifier; and searching the corresponding target mail from the mailbox folder based on the target mail identification.

Optionally, in the mail withdraw method according to the present invention, after deleting the target mail in the mailbox folder, the method further includes: and sending the reminding mail of which the target mail is withdrawn to a sender client and one or more receiver clients.

Optionally, in the mail withdrawal method according to the present invention, the sender client includes a mail withdrawal button; responding to the withdrawal request of the target mail sent by the sender client side, comprising: in response to a revocation request for a target mail sent by a sender client by clicking a mail revocation button.

Alternatively, in the mail withdrawal method according to the present invention, the predetermined period of time is 7 days.

According to one aspect of the present invention, there is provided a mail withdrawal system including: a mail server adapted to perform the method of any of the above; one or more sender clients, communicatively coupled to the mail server, are adapted to send a withdrawal request for a target mail to the mail server.

According to one aspect of the invention, there is provided a computing device comprising: at least one processor; a memory storing program instructions, wherein the program instructions are configured to be adapted to be executed by the at least one processor, the program instructions comprising instructions for performing the mail retrieval method as described above.

According to one aspect of the present invention, there is provided a readable storage medium storing program instructions that, when read and executed by a computing device, cause the computing device to perform a mail withdrawal method as described above.

According to the technical scheme of the invention, a mail withdrawing method and a mail withdrawing system are provided, wherein when a mail server receives a withdrawing request of a target mail sent by a sender client, whether the time interval between the sending time and the current time of the target mail exceeds a preset time length is judged, and if the time interval does not exceed the preset time length, a receiver selection page of the target mail is returned to the sender client. Then, the sender may select one or more pieces of recipient information from among the pieces of recipient information at the recipient selection page, and then the mail server traverses mailbox folders corresponding to the one or more pieces of recipient information selected by the sender to find target mail from the mailbox folders and delete the target mail in the mailbox folders. Thus, according to the technical scheme of the invention, the condition of mail withdrawal does not limit whether the mail is read, so that the read mail can be withdrawn, and the mail withdrawal can be performed for partial receivers of the target mail.

The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present invention more readily apparent.

Drawings

To the accomplishment of the foregoing and related ends, certain illustrative aspects are described herein in connection with the following description and the annexed drawings, which set forth the various ways in which the principles disclosed herein may be practiced, and all aspects and equivalents thereof are intended to fall within the scope of the claimed subject matter. The above, as well as additional objects, features, and advantages of the present disclosure will become more apparent from the following detailed description when read in conjunction with the accompanying drawings. Like reference numerals generally refer to like parts or elements throughout the present disclosure.

FIG. 1 shows a schematic diagram of a mail retrieval system 100 according to one embodiment of the invention;

FIG. 2 shows a schematic diagram of a computing device 200 according to one embodiment of the invention;

fig. 3 shows a flow chart of a mail revocation method 300 according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

Fig. 1 shows a schematic diagram of a mail retrieval system 100 according to one embodiment of the invention.

As shown in fig. 1, mail revocation system 100 includes one or more sender clients 110, a mail server 120, and one or more recipient clients 130. Wherein mail server 120 is communicatively coupled to one or more sender clients 110, one or more recipient clients 130, respectively, such as via a wired or wireless network connection.

The sender client 110 and the receiver client 130 may be terminal devices used by users, specifically, personal computers such as desktop computers and notebook computers, and mobile terminals such as mobile phones, tablet computers, multimedia devices and intelligent wearable devices, but are not limited thereto. Sender client 110, recipient client 130 may also be an application resident in a terminal device. For example, sender client 110, recipient client 130 may be various mailbox applications, mailbox Web ends, and the like.

The mail server 120 is configured to provide a mail receiving service for the sender client 110 and the receiver client 130, and may be implemented as any computing device in the prior art capable of providing a mail withdrawal service for the sender client 110, which is not limited by the specific type of the mail server in the present invention. For example, mail server 120 may be implemented as, but is not limited to, a desktop computer, a notebook computer, a processor chip, a cell phone, a tablet computer, and the like. The server may also be a service program residing in the computing device.

According to one embodiment of the invention, as shown in FIG. 1, mail server 120 includes front-end, back-end, data storage devices that are in communication connection in sequence. In particular embodiments, the data storage device may be implemented as a MySQL high availability cluster, which may be used to store mail information, mail withdrawal details, mail withdrawal options, mail withdrawal policies, withdrawal reason information for mail, and the like.

In one embodiment, mail server 120 also includes one or more Exchange server nodes (not shown). The Exchange server node may be configured to traverse one or more mailbox folders corresponding to the recipient information to find the target mail from the mailbox folders and delete the target mail in the mailbox folders.

In one implementation, the front end may include multiple pages developed using the JavaScript, CSS, HTML language, and the front end may be used to obtain mail information and a presentation of mail withdrawal pages. The backend may be developed from the python Django framework and may be used to call MySQL and Exchange. In some embodiments, the backend may include core functional modules such as mail revocation action execution module, revocation result query module, revocation (history) detail query module, notification mail transmission, and the like.

In an embodiment of the present invention, mail server 120 is adapted to perform mail revocation method 300. The mail pull-back method 300 of the present invention will be described in detail below.

In one embodiment, mail server 120 of the present invention may be implemented as a computing device such that mail revocation method 300 of the present invention may be performed in the computing device.

FIG. 2 illustrates a block diagram of a computing device 200 according to one embodiment of the invention. As shown in FIG. 2, in a basic configuration 202, computing device 200 typically includes a system memory 206 and one or more processors 204. A memory bus 208 may be used for communication between the processor 204 and the system memory 206.

Depending on the desired configuration, the processor 204 may be any type of processing including, but not limited to: a microprocessor (μp), a microcontroller (μc), a digital information processor (DSP), or any combination thereof. Processor 204 may include one or more levels of cache, such as a first level cache 210 and a second level cache 212, a processor core 214, and registers 216. The example processor core 214 may include an Arithmetic Logic Unit (ALU), a Floating Point Unit (FPU), a digital signal processing core (DSP core), or any combination thereof. The example memory controller 218 may be used with the processor 204, or in some implementations, the memory controller 218 may be an internal part of the processor 204.

Depending on the desired configuration, system memory 206 may be any type of memory including, but not limited to: volatile memory (such as RAM), non-volatile memory (such as ROM, flash memory, etc.), or any combination thereof. The system memory 106 may include an operating system 220, one or more applications 222, and program data 224. The application 222 is in effect a plurality of program instructions for instructing the processor 204 to perform a corresponding operation. In some implementations, the application 222 can be arranged to cause the processor 204 to operate with the program data 224 on an operating system.

Computing device 200 may also include an interface bus 240 that facilitates communication from various interface devices (e.g., output devices 242, peripheral interfaces 244, and communication devices 246) to basic configuration 202 via bus/interface controller 230. The example output device 242 includes a graphics processing unit 248 and an audio processing unit 250. They may be configured to facilitate communication with various external devices, such as a display or speakers, via one or more a/V ports 252. The example peripheral interface 244 may include a serial interface controller 254 and a parallel interface controller 256, which may be configured to facilitate communication via one or more I/O ports 258 and external devices such as input devices (e.g., keyboard, mouse, pen, voice input device, touch input device) or other peripherals (e.g., printer, scanner, etc.). The example communication device 246 may include a network controller 260 that may be arranged to facilitate communication with one or more other computing devices 262 over a network communication link via one or more communication ports 264.

The network communication link may be one example of a communication medium. Communication media may typically be embodied by computer readable instructions, data structures, program modules, and may include any information delivery media in a modulated data signal, such as a carrier wave or other transport mechanism. A "modulated data signal" may be a signal that has one or more of its data set or changed in such a manner as to encode information in the signal. By way of non-limiting example, communication media may include wired media such as a wired network or special purpose network, and wireless media such as acoustic, radio Frequency (RF), microwave, infrared (IR) or other wireless media. The term computer readable media as used herein may include both storage media and communication media.

In the computing device 200 according to the present invention, the application 222 of the computing device 200 includes a plurality of program instructions for executing the mail retrieval method 300, which may instruct the processor 204 to execute the mail retrieval method 300 of the present invention, so that the computing device 200 can execute the mail retrieval method 300 of the present invention.

Fig. 3 shows a flow chart of a mail revocation method 300 according to an embodiment of the present invention. The method 300 is adapted to be executed in a mail server 120, such as the aforementioned computing device 200. Mail server 120 may be communicatively coupled to one or more sender clients 110, one or more recipient clients 130.

As shown in fig. 3, method 300 includes steps 310-340.

First, in step 310, the sender client 110 may send a revocation request for a target mail to the mail server 120. The mail server 120 determines whether a time interval between a transmission time of the target mail and a current time exceeds a predetermined length of time in response to a withdrawal request for the target mail transmitted from the sender client 110.

In one embodiment, sender client 110 includes a mail revocation button. The sender may click a mail revocation button at the sender client 110 to effect sending a revocation request for the target mail to the mail server 120. Accordingly, in step 310, the mail server 120 (front end) may determine whether the time interval between the transmission time of the target mail and the current time exceeds a predetermined length in response to the withdrawal request for the target mail transmitted by the sender client 110 by clicking the mail withdrawal button.

In one implementation, the backend of mail server 120 includes a info, recallpolicy, recallhistory interface. The front end of the mail server 120 may implement, through the info, recallpolicy, recallhistory interface of the request back end, to determine whether the time interval between the sending time and the current time of the target mail exceeds a predetermined duration in response to the withdrawal request for the target mail sent by the sender client 110.

Here, in the embodiment of the present invention, the conditions that need to be satisfied for withdrawing the mail include: the time interval between the sending time of the target mail and the current time does not exceed a preset time length. In one embodiment, the predetermined time period may be, for example, 7 days, but the present invention is not particularly limited to the predetermined time period.

If the time interval between the sending time of the target mail and the current time does not exceed the predetermined length of time, the following step 320 is continued.

In step 320, mail server 120 returns the recipient selection page of the target mail to sender client 110, and sender client 110 may display the recipient selection page.

The sender may then select one or more recipient information from among the plurality of recipient information for the targeted mail at the recipient selection page of the sender client 110.

Next, in step 330, the mail server 120 obtains one or more pieces of recipient information selected by the sender on the recipient selection page.

It is noted that in an embodiment of the present invention, by providing a recipient selection page of a target mail to a sender client for a sender to select a part of recipient information (one or more recipient information) from a plurality of recipient information of the target mail, a mail withdraw operation is performed for the selected part of recipients of the target mail.

In one implementation, the backend of mail server 120 also includes a recallreason, recalldetail, recall interface. The front end of the mail server 120 may implement a receiver selection page to return the target mail to the sender client 110 by requesting a recallreason, recalldetail, recall interface of the back end to obtain one or more receiver information selected by the sender at the receiver selection page.

Finally, in step 340, the mailbox folders corresponding to the one or more pieces of recipient information (selected by the sender on the recipient selection page) are traversed to find the target mail from the mailbox folders corresponding to the one or more pieces of recipient information, and the target mail in each mailbox folder is deleted. In this way, the recipient client to which the one or more recipient information corresponds no longer displays the target mail, i.e., the target mail that the one or more recipient clients previously received (whether read or not) has been revoked, thereby enabling mail revocation for portions of recipients of the target mail.

Here, in one embodiment, the Exchange server node may be utilized to traverse one or more mailbox folders corresponding to the recipient information to find the target mail from the mailbox folders and delete the target mail in each mailbox folder.

In one embodiment of the present invention, when traversing the mailbox folder corresponding to one or more recipient information (using the Exchange server node), it may also be determined whether the recipient information contains a group for each recipient information (selected by the sender on the recipient selection page).

If the recipient information includes a group, a plurality of group member information included in the group is acquired. Specifically, the plurality of group member information contained by the group may be queried through ldap. Then, traversing the mailbox folders corresponding to the group member information to search the target mail from the mailbox folders corresponding to the group member information, and deleting the target mail in each mailbox folder.

In addition, if the receiver information does not contain the group, the mailbox folder corresponding to the receiver information is directly traversed to search the target mail from the mailbox folder, and the target mail in the mailbox folder is deleted.

In one embodiment of the invention, before returning the recipient selection page of the target mail to the sender client, it may first be determined whether the target mail is a mail that has been previously revoked that needs to be revoked again.

If the target mail is a mail that needs to be re-withdrawn, a re-withdraw page is returned to the sender client 110 so that the sender can send a re-withdraw request to the mail server 120 at the re-withdraw page, for example, by clicking a re-withdraw button on the re-withdraw page. Subsequently, the mail server 120 returns the recipient selection page of the target mail to the sender client 110 in response to the re-revocation request transmitted by the sender via the re-revocation page.

If the target mail is not one that needs to be withdrawn again, mail server 120 may return the recipient selection page of the target mail directly to sender client 110.

In one embodiment of the present invention, after the mail server 120 returns the recipient selection page of the target mail to the sender client 110, the sender may also input withdrawal reason information at the recipient selection page of the sender client 110. The mail server 120 may acquire withdrawal reason information entered by the sender on the recipient selection page, and may store the target mail information in association with the withdrawal reason information. Specifically, the target mail information may be stored in association with the withdrawal reason information in the data storage device. Thus, the user can inquire the withdrawal reason of the target mail.

In one embodiment of the invention, each mail piece includes a unique mail piece identification, i.e., the mail piece identification corresponds one-to-one to the mail piece for identifying the mail piece. The withdrawal request for the target mail sent by the sender client includes the target mail identifier. When searching for the target mail from the mailbox folder, the target mail corresponding to the target mail identifier can be searched for from the mailbox folder by acquiring the target mail identifier, for example, the target mail identifier can be acquired from the withdrawal request, and then, based on the target mail identifier.

In one embodiment of the present invention, after deleting the target mail in each mailbox folder (corresponding to the selected one or more recipient information), mail server 120 may also send a reminder mail to sender client 110, one or more recipient clients 130 corresponding to the one or more recipient information that the target mail has been revoked, to remind the sender and recipient that the target mail has been revoked. In addition, the reminding mail of which the target mail is withdrawn can be sent to the manager client.

In one embodiment of the present invention, mail server 120 may also generate mail withdrawal details from a withdrawal request for the target mail sent by the sender client and store the mail withdrawal details in the data storage device. In this way, the user is facilitated to query the details of the withdrawn mail.

According to the mail withdrawal method 300 of the present invention, when receiving a withdrawal request for a target mail sent by a sender client, a mail server determines whether a time interval between a sending time and a current time of the target mail exceeds a predetermined time length, and if the time interval does not exceed the predetermined time length, returns a recipient selection page of the target mail to the sender client. Then, the sender may select one or more pieces of recipient information from among the pieces of recipient information at the recipient selection page, and then the mail server traverses mailbox folders corresponding to the one or more pieces of recipient information selected by the sender to find target mail from the mailbox folders and delete the target mail in the mailbox folders. Thus, according to the technical scheme of the invention, the condition of mail withdrawal does not limit whether the mail is read, so that the read mail can be withdrawn, and the mail withdrawal can be performed for partial receivers of the target mail.

In addition, according to the technical scheme of the invention, the sender can input withdrawal reason information on the receiver selection page, and the mail server can store the target mail information and the withdrawal reason information in a correlated manner. Thus, the self-defined withdrawal reason is supported, and the user is convenient to inquire about the withdrawal reason of the target mail.

A8, the method of any of A1-A7, wherein the sender client comprises a mail withdraw button; responding to the withdrawal request of the target mail sent by the sender client side, comprising: in response to a revocation request for a target mail sent by a sender client by clicking a mail revocation button.

A9, the method of any of A1-A8, wherein the predetermined period of time is 7 days.

The various techniques described herein may be implemented in connection with hardware or software or, alternatively, with a combination of both. Thus, the methods and apparatus of the present invention, or certain aspects or portions of the methods and apparatus of the present invention, may take the form of program code (i.e., instructions) embodied in tangible media, such as removable hard drives, U-drives, floppy diskettes, CD-ROMs, or any other machine-readable storage medium, wherein, when the program is loaded into and executed by a machine, such as a computer, the machine becomes an apparatus for practicing the invention.

In the case of program code execution on programmable computers, the mobile terminal will generally include a processor, a storage medium readable by the processor (including volatile and non-volatile memory and/or storage elements), at least one input device, and at least one output device. Wherein the memory is configured to store program code; the processor is configured to execute the storage device list management method of the present invention in accordance with instructions in the program code stored in the memory.

By way of example, and not limitation, readable media comprise readable storage media and communication media. The readable storage medium stores information such as computer readable instructions, data structures, program modules, or other data. Communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media. Combinations of any of the above are also included within the scope of readable media.

In the description provided herein, algorithms and displays are not inherently related to any particular computer, virtual system, or other apparatus. Various general-purpose systems may also be used with examples of the invention. The required structure for a construction of such a system is apparent from the description above. In addition, the present invention is not directed to any particular programming language. It will be appreciated that the teachings of the present invention described herein may be implemented in a variety of programming languages, and the above description of specific languages is provided for disclosure of enablement and best mode of the present invention.

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects.

Those skilled in the art will appreciate that the modules or units or components of the devices in the examples disclosed herein may be arranged in a device as described in this embodiment, or alternatively may be located in one or more devices different from the devices in this example. The modules in the foregoing examples may be combined into one module or may be further divided into a plurality of sub-modules.

Those skilled in the art will appreciate that the modules in the apparatus of the embodiments may be adaptively changed and disposed in one or more apparatuses different from the embodiments. The modules or units or components of the embodiments may be combined into one module or unit or component and, furthermore, they may be divided into a plurality of sub-modules or sub-units or sub-components.

Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments.

Furthermore, some of the embodiments are described herein as methods or combinations of method elements that may be implemented by a processor of a computer system or by other means of performing the functions. Thus, a processor with the necessary instructions for implementing the described method or method element forms a means for implementing the method or method element. Furthermore, the elements of the apparatus embodiments described herein are examples of the following apparatus: the apparatus is for carrying out the functions performed by the elements for carrying out the objects of the invention.

As used herein, unless otherwise specified the use of the ordinal terms "first," "second," "third," etc., to describe a general object merely denote different instances of like objects, and are not intended to imply that the objects so described must have a given order, either temporally, spatially, in ranking, or in any other manner.

While the invention has been described with respect to a limited number of embodiments, those skilled in the art, having benefit of the above description, will appreciate that other embodiments are contemplated within the scope of the invention as described herein. Furthermore, it should be noted that the language used in the specification has been principally selected for readability and instructional purposes, and may not have been selected to delineate or circumscribe the inventive subject matter.

Claims (10)

1. A mail withdrawal method, executed in a mail server, comprising:

responding to a withdrawal request of a target mail sent by a sender client, and judging whether the time interval between the sending time and the current time of the target mail exceeds a preset time length or not;

if the preset time is not exceeded, returning a receiver selection page of the target mail to the sender client;

acquiring one or more pieces of recipient information selected at the recipient selection page;

traversing the mailbox folders corresponding to the one or more pieces of receiver information to search target mails from the mailbox folders, and deleting the target mails in the mailbox folders.

2. The method of claim 1, further comprising:

and acquiring withdrawal reason information input in the receiver selection page, and storing the target mail information and the withdrawal reason information in a correlated manner.

3. The method of claim 1 or 2, wherein traversing the mailbox folders corresponding to the one or more recipient information to find the target mail from the mailbox folders comprises:

for each piece of receiver information, judging whether the receiver information contains a group;

if the group is included, acquiring a plurality of group member information included in the group;

traversing the mailbox folders corresponding to the group member information to search the target mail from the mailbox folders.

4. The method of claim 3, wherein traversing the mailbox folders corresponding to the one or more recipient information to find the target mail from the mailbox folders further comprises:

if the receiver information does not contain the group, the mailbox folder corresponding to the receiver information is directly traversed to search the target mail from the mailbox folder.

5. The method of any of claims 1-4, wherein returning the recipient selection page of the target mail to the sender client comprises:

judging whether the target mail is a mail needing to be withdrawn again;

if yes, returning a re-withdrawal page to the sender client, and responding to a re-withdrawal request sent through the re-withdrawal page, and returning a receiver selection page of the target mail to the sender client;

if not, the receiver selection page of the target mail is directly returned to the sender client.

6. The method of any of claims 1-5, wherein each mail piece includes a unique mail piece identification; searching the target mail from the mailbox folder comprises the following steps:

acquiring a target mail identifier;

and searching the corresponding target mail from the mailbox folder based on the target mail identification.

7. The method of any of claims 1-6, wherein after deleting the target mail in the mailbox folder, further comprising:

and sending the reminding mail of which the target mail is withdrawn to a sender client and one or more receiver clients.

8. A mail retrieval system, comprising:

mail server adapted to perform the method according to any of claims 1-7;

one or more sender clients, communicatively coupled to the mail server, are adapted to send a withdrawal request for a target mail to the mail server.

9. A computing device, comprising:

at least one processor; and

a memory storing program instructions, wherein the program instructions are configured to be adapted to be processed by the at least one processor, the program instructions comprising instructions for processing the method of any of claims 1-7.

10. A readable storage medium storing program instructions which, when read and processed by a computing device, cause the computing device to process the method of any of claims 1-7.