JP2015121984A - Portable communication terminal, control method and computer program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable communication terminal that enables a reception of junk mails to be efficiently rejected even if a user does not perform cumbersome operations.SOLUTION: An extraction unit is configured to extract a character string commonly included in two or more mail addresses indicative of respective transmission sources of two or more selected electronic mails, and a junk mail suppression unit is configured to set the extracted character string as a reception rejection character string, and suppress a reception of the electronic mail transmitted from the mail address including the reception rejection character string. Each mail address is composed of, from a beginning, a user name, at mark and domain name, and the domain name is partitioned by a period and is composed of a plurality of level domains including a top level domain located at the rearmost. The extraction unit is configured to extract the character string commonly included in two or more the mail addresses, with the user name, and the domain at each level excluding the top level domain constituting each mail address as a minimum extraction unit.

Description

  The present invention relates to a mobile communication terminal having a function of receiving an electronic mail, and more particularly to a technique for dealing with spam mail.

Today, an enormous number of junk mails are being sent out, pressing down a finite wireless communication band. In addition, there are users who are paid a large amount of packet communication fees for unnecessary spam mails. Moreover, there is a possibility that the user becomes a victim of a crime such as fraud based on the spam mail.
Therefore, each carrier accepts a setting for rejecting reception from the user. Mail sent from a mail address designated by the user or a mail address having a domain name designated by the user is not sent to the terminal but discarded by the mail server.

The setting method for reception refusal is difficult for a user who is not familiar with the operation of a mobile phone or a smartphone. In addition, even for a user who is accustomed to the operation, the operation of inputting the mail address character by character or copying and pasting the mail address for setting the reception refusal is complicated.
Patent Document 1 discloses a technique for rejecting reception of junk mail without performing such a complicated operation. In the system of Patent Document 1, when a mail address related to spam mail is selected on the terminal side, the mail address is listed in the server list. Thereafter, since the server does not transmit mail transmitted from the mail address to the terminal, the terminal can refuse to receive the junk mail.

JP 2003-143232 A

However, even if the technique disclosed in Patent Document 1 is used, each time a junk mail is received, the user needs to perform an operation of selecting the mail address. For users who are suffering from spam mails that are sent in large quantities every day, a technology that can reject spam mails more efficiently is desired.
The present invention has been made in view of the above problems, and provides a mobile communication terminal, a control method, and a computer program capable of efficiently rejecting reception of spam mail without requiring a complicated operation by the user. The purpose is to do.

  In order to achieve the above object, a mobile communication terminal according to one aspect of the present invention includes a receiving unit that receives an e-mail, a selecting unit that selects two or more e-mails from a plurality of received e-mails, and a selection. An extraction unit that extracts a character string that is commonly included in two or more mail addresses indicating a transmission source of each of the two or more e-mails, and sets the extracted character string as a reception rejection character string, A junk mail suppression unit that suppresses reception of an email transmitted from a mail address including a reception rejection character string, and each mail address is configured with a user name, an at sign, and a domain name from the top, and the domain The name is composed of multiple levels of domains, including the top level domain located at the end, separated by a period. Username configuration and, each level of the domain except for the top level domain as the minimum extraction unit, and extracts a character string included in common in the two or more email addresses.

  By providing the above configuration, the mobile communication terminal can efficiently reject reception of spam mail without requiring a complicated operation from the user.

Configuration diagram of e-mail system 1 Block diagram of mobile phone 10 Sequence diagram of junk mail filter setting processing executed by e-mail system 1 Data structure diagram of designated reception list 180 Flowchart of spam mail filter setting process executed by mobile phone 10 Sequence diagram of e-mail delivery processing executed by e-mail system 1 (A) Diagram for explaining selection of spam mail (b) Data configuration diagram of extraction history (c) Diagram showing reception refusal character string (A) Diagram for explaining selection of spam mail (b) Data configuration diagram of extraction history (c) Diagram showing reception refusal character string (A) Diagram for explaining selection of spam mail (b) Data configuration diagram of extraction history (c) Diagram showing reception refusal character string (A) Diagram for explaining selection cancellation of spam mail (b) Data configuration diagram of extraction history (c) Diagram showing reception refusal character string The figure for demonstrating the modification which notifies a user of the set reception refusal character string. Sequence diagram of e-mail delivery processing executed by a modification of e-mail system 1

Hereinafter, a mobile phone 10 which is one embodiment of the present invention will be described with reference to the drawings.
<1. Overview>
FIG. 1 is a configuration diagram of an e-mail system 1 using a mobile phone 10 which is one embodiment of the present invention. As shown in the figure, the electronic mail system 1 includes a mobile phone 10, a mail server 20, a gateway server 30, and a transmission source terminal 40.

  The cellular phone 10 performs a junk mail filter setting process including setting of a reception rejection character string and setting of a specified reception address for the mail server 20. Here, when the cellular phone 10 receives an operation for designating one of the received e-mails as a junk e-mail from the user, the mobile phone 10 receives the e-mail based on the e-mail address indicating the designated e-mail transmission source. Set the reject string.

The electronic mail transmitted from the transmission source terminal 40 to the mobile phone 10 is received by the gateway server 30 of the mobile phone network via the Internet. The gateway server 30 transmits the email to the mail server 20 after performing protocol conversion of the received email.
The mail server 20 determines whether or not the received electronic mail can be distributed based on the junk mail filter condition set by the mobile phone 10. The mail server 20 transmits an e-mail to the mobile phone 10 only when it is determined that distribution is possible.

<2. Configuration of mobile phone 10>
FIG. 2 is a block diagram functionally showing the internal configuration of the mobile phone 1.
As shown in the figure, the mobile phone 1 includes an antenna 101, a communication control unit 102, a touch panel 103, a controller 104, a storage unit 105, a control unit 106, a receiver 107, and a microphone 108.

The mobile phone 1 includes a processor and a semiconductor memory not shown. Each functional block of the mobile phone 1 is configured as hardware, or realized by a computer executing a computer program stored in a semiconductor memory.
The communication control unit 102 is connected to the mobile phone network via the antenna 101 by the processor executing a computer program stored in the storage unit 105, and is connected to another telephone, personal computer, web server, transmission source terminal 40. E-mail, voice data, character data, image data, position data, etc. are transmitted / received to / from the device.

The touch panel 103 includes a touch pad 131 that is an input device and an LCD (Liquid Crystal Dspray) 132 that is a display device.
The touch pad 131 includes a touch sensor such as an electrostatic capacitance method or a piezoelectric method, and is provided so as to overlap with the LCD 132. The touch pad 131 is made of a transparent member, and is configured so that an image displayed on the LCD 132 can be seen.

The user can select the junk mail and deselect the junk mail by operating the touch panel 103. Details of this will be described later.
The controller 104 detects the contact of the user's finger or the like with the touch pad 131, and during the detection, the controller 104 determines the coordinate value (x, y) of the contact position for each unit time (for example, 25 milliseconds). It outputs to 106.

The storage unit 105 is a semiconductor memory, and includes a program storage memory, a working memory, a setting value storage memory, a mail storage unit 151 for storing e-mails, and the like.
The program storage memory stores various application programs including an OS and an application program for e-mail.
The mail storage unit 151 manages a plurality of electronic mails for each folder. As shown in FIG. 2, the mail storage unit 151 stores a received folder 152 in which received emails are stored, a sent folder 153 in which transmitted emails are stored, and emails deleted by the user. A rubbish bin folder 154 and a junk mail folder 155 in which an e-mail designated as junk mail is stored.

When the user activates an e-mail application program, a screen for displaying a list of e-mails stored in each folder is displayed on the touch panel 103 for each folder.
Here, the selection of junk mail is performed by the user selecting one e-mail and moving the selected e-mail to the junk mail folder while the reception folder screen is displayed on the touch panel 103. Done.

Further, the selection of spam mail is canceled when the user moves the latest email stored in the spam mail folder 155 to the reception folder while the spam mail folder screen is displayed on the touch panel 103. Done.
Here, each electronic mail is composed of a mail header and a mail text. The mail header includes a subject, a mail address indicating a transmission source, a sender name, a mail address indicating a transmission destination, a transmission date and time, and the like. The mail text includes a message and attached file data.

  The control unit 106 is connected to each block of the mobile phone 10. The control unit 106 implements various functions by the processor executing computer programs stored in the storage unit 105, and controls the entire mobile phone 10. In the present embodiment, a junk mail filter setting function that is one of the characteristic functions realized by the control unit 106 will be described. Note that the junk mail filter setting function is realized, for example, when the processor executes a junk mail filter setting program that is a part of an application program for electronic mail.

As shown in FIG. 2, the control unit 106 includes an extraction unit 161, a junk mail suppression unit 162, and a stored mail check unit 163 as components related to the junk mail filter setting function. The extraction unit 161 holds an extraction history 164, and the junk mail suppression unit 163 holds a reception rejection character string 165.
Each time junk mail is selected, that is, each time an e-mail is stored in the junk mail folder 155, the extraction unit 161 receives the e-mail address and the reception rejection character string set in the junk mail suppression unit 162. 165 has a function of extracting a character string included in common with 165. Further, the extraction unit 161 has a function of accumulating and holding the extracted character string in the extraction history 164. Furthermore, the extraction unit 161 has a function of notifying the spam mail suppression unit 162 of the extracted character string.

In addition, when the selection of the junk mail is canceled, that is, when the latest e-mail stored in the junk mail folder 155 is returned to the reception folder 152, the extraction unit 161 extracts the previous one from the extraction history 164. The read character string (second newest character string) is read out and notified to the junk mail suppression unit 162.
The junk mail suppression unit 162 has a function of holding the reception rejection character string 165 and overwriting the reception rejection character string 165 with the received character string each time a character string is received from the extraction unit 161. Further, the junk mail suppression unit 162 has a function of transmitting the updated reception rejection character string 165 to the mail server 20 every time the reception rejection character string 165 is updated.

  The saved mail confirmation unit 163 checks the email address of the email stored in the reception folder 152 every time the reception rejection character string 165 held in the junk mail suppression unit 162 is updated, and the reception rejection character string 165. Has a function to determine whether or not there is a mail address including. When a mail address including the reception rejection character string 165 exists, the stored mail confirmation unit 163 has a function of transmitting the mail address to the mail server 20 as a designated reception address.

The receiver 107 has a function of outputting a received sound. The microphone 108 has a function of collecting sound.
<3. Operation>
Here, the operation of the electronic mail system 1 will be described with reference to FIGS.
(1) Junk E-mail Filter Setting Processing of E-Mail System 1 FIG. 3 is a sequence diagram of junk e-mail filter setting processing executed by the e-mail system 1.

First, the cellular phone 10 performs a junk mail filter setting process (step S1), and a reception rejection character string and a designated reception address are transmitted from the cellular phone 10 to the mail server 20 (step S2). When the mail server 20 receives the reception refusal character string and the designated reception address, the mail server 20 updates the junk mail filter conditions of the mobile phone 10 (step S3).
Specifically, the mail server 20 updates the reception rejection character string stored so far using the received rejection character string. Further, as shown in FIG. 4, the mail server 20 holds a designated reception list 180 in which designated reception addresses set by the mobile phone 10 are registered, and the newly set designated reception addresses are stored in the designated reception list 180. sign up.

(2) Spam Mail Filter Setting Process of Mobile Phone 10 FIG. 5 is a flowchart of the spam mail filter setting process executed by the mobile phone 10. This process is the detail of step S1 of FIG.
The extraction unit 161 waits until an operation for selecting junk mail or canceling junk mail selection is performed (NO in step S101 and NO in step S111).

When the junk mail selection operation is performed (YES in step S101), the extraction unit 161 and the e-mail address of the e-mail stored in the junk mail folder 155 in step S101 and the reception rejection character string 165 set in step S101. And a character string included in common with each other is extracted (step S102).
The extraction unit 161 accumulates and holds the extracted character string in the extraction history 164 (step S103), and further notifies the junk mail suppression unit 162 of the extracted character string. The junk mail suppression unit 162 sets a new reception rejection character string 165 by overwriting the reception rejection character string 165 set so far with the character string received from the extraction unit 161 (step S104).

Next, the stored mail confirmation unit 163 confirms the mail address of the email stored in the reception folder 152, and determines whether there is a mail address including the reception rejection character string 165 set in step S104. (Step S105).
If there is no mail address including the reception refusal character string 165 (NO in step S106), the process returns to step S101. If there is a mail address including the reception rejection character string 165 (YES in step S106), the stored mail confirmation unit 163 sets the mail address as a designated reception address (step S107), and returns to step S101.

When an operation for deselecting junk mail is performed (YES in step S111), the extraction unit 161 reads from the extraction history 164 a character string extracted immediately before the currently set reception rejection character string 165. (Step S112). Then, the extraction unit 161 notifies the read character string to the junk mail suppression unit 162.
The junk mail suppression unit 162 sets a new reception rejection character string 165 by overwriting the reception rejection character string 165 set so far with the character string received from the extraction unit 161 (step S113). Then, it returns to step S101.

(3) E-mail Distribution Processing of E-Mail System 1 FIG. 6 is a sequence diagram of e-mail distribution processing executed by the e-mail system 1.
First, the mail server 20 receives an e-mail addressed to the mobile phone 10 transmitted from the transmission source terminal 40 (step S11).
The mail server 20 extracts the mail address of the transmission source terminal 40 from the mail header of the received electronic mail, and determines whether or not the extracted mail address clears the junk mail filter condition of the mobile phone 10.

Specifically, the mail server 20 determines whether or not the mail address of the transmission source terminal 40 is registered in the designated reception list 180. If the mail address of the sender terminal 40 is registered in the designated reception list 180, it is determined that the junk mail filter condition is cleared.
When the mail address of the transmission source terminal 40 is not registered in the designated reception list 180, the mail server 20 determines whether or not the reception rejection character string is included in the mail address of the transmission source terminal 40. If the e-mail address of the sender terminal 40 does not include a reception rejection character string, it is determined that the junk e-mail filter condition is cleared.

On the other hand, if the e-mail address of the transmission source terminal 40 is not registered in the designated reception list 180 and the e-mail address of the transmission source terminal 40 includes a reception rejection character string, the junk e-mail filter condition is set. Judge that it is not cleared.
If the junk mail filter condition is not cleared (NO in step S12), the mail server 20 discards the e-mail received in step S11 (step S13).

If the junk mail filter condition is cleared (YES in step S12), the mail server 20 stores the e-mail received in step S11 in the mailbox of the mobile phone 10 (step S14). On the other hand, the reception of new mail is notified (step S15).
When receiving the incoming call notification from the mail server 20, the cellular phone 10 transmits a mail reception request to the mail server 20 (step S16). When the mail server 20 receives a mail reception request from the mobile phone 10, the mail server 20 reads an e-mail from the mailbox (step S17) and transmits it to the mobile phone 10 (step S18). The mobile phone 10 receives the email and stores it in the reception folder 152 (step S19).

<4. Specific example of spam filter setting process>
Here, the junk mail filter setting process executed by the extracting unit 161, the junk mail suppressing unit 162, and the stored mail checking unit 163 will be described using a specific example with reference to FIGS.
First, a case will be described in which one e-mail is selected as a junk mail for the first time from a state in which a reception reject character string and a specified reception address are not set. As shown in FIG. 7A, when the user moves an e-mail whose mail address is “info@aaa.meiwaku.mail.jp” from the reception folder 152 to the junk mail folder 155, the e-mail is changed. Selected as spam mail. Here, for convenience of explanation, the e-mail stored in each folder is represented by a mail address indicating the transmission source.

  At this time, the character string is not yet held in the extraction history 164 of the extraction unit 161. Further, the reception rejection character string 165 of the junk mail suppression unit 162 has not been set yet. In this case, the extraction unit 161 extracts the entire mail address “info@aaa.meiwaku.mail.jp”, and stores the extracted character string in the extraction history 164 as shown in FIG. Then, the extraction unit 161 notifies the extracted character string “info@aaa.meiwaku.mail.jp” to the junk mail suppression unit 162.

  The junk mail suppression unit 162 receives the character string “info@aaa.meiwaku.mail.jp” from the extraction unit 161, and sets the received character string in the reception rejection character string 165 as shown in FIG. At the same time, a reception rejection character string “info@aaa.meiwaku.mail.jp” is transmitted to the mail server 20. Thereafter, the mobile phone 10 can refuse to receive an e-mail transmitted from a mail address including “info@aaa.meiwaku.mail.jp”.

Here, since the e-mail whose mail address is “info@aaa.meiwaku.mail.jp” has been moved from the reception folder 152 to the junk mail folder 155, the reception folder 152 has a reception rejection character string “info @ aaa”. There are no email addresses that contain ".meiwaku.mail.jp". Therefore, the stored mail confirmation unit 163 does not set the designated reception address.
Next, as shown in FIG. 8A, a case is considered where an e-mail whose mail address is “hallow@aab.meiwaku.mail.jp” is selected as a junk mail.

  At this time, as shown in FIG. 7C, “info@aaa.meiwaku.mail.jp” is set as the reception rejection character string 165 in the junk mail suppression unit 162. Therefore, the extraction unit 161 is set to “hallow@aab.meiwaku.mail.jp”, which is a mail address indicating the transmission source of the e-mail stored in the junk mail folder 155, and the reception rejection character string 165 “ The character string “meiwaku.mail.jp” included in common with “info@aaa.meiwaku.mail.jp” is extracted. As illustrated in FIG. 8B, the extraction unit 161 stores the extracted character string in the extraction history 164, and further notifies the extracted character string “meiwaku.mail.jp” to the junk mail suppression unit 162. .

  The junk mail suppression unit 162 receives the character string “meiwaku.mail.jp” from the extraction unit 161 and updates the received rejection character string 165 by overwriting it with the received character string as shown in FIG. At the same time, the latest reception rejection character string “meiwaku.mail.jp” is transmitted to the mail server 20. Thereafter, the mobile phone 10 can refuse to receive an e-mail transmitted from an e-mail address including “meiwaku.mail.jp”.

  The stored mail confirmation unit 163 confirms whether or not a mail address including the updated reception rejection character string “meiwaku.mail.jp” exists in the reception folder 152. Since “hallow@aab.meiwaku.mail.jp” has already been moved to the junk mail folder 155, there is no mail address including “meiwaku.mail.jp” in the reception folder 152. Therefore, the stored mail confirmation unit 163 does not set the designated reception address.

Subsequently, as shown in FIG. 9A, a case is considered where an e-mail whose e-mail address is “bee@meiwaku.bee.jp” is selected as a junk e-mail.
At this time, as shown in FIG. 8C, “meiwaku.mail.jp” is set as the reception rejection character string 165 in the junk mail suppression unit 162. The extraction unit 161 now has “bee@meiwaku.bee.jp”, which is a mail address indicating the transmission source of the e-mail stored in the junk mail folder 155, and “meiwaku.mail.mail. The character string “meiwaku” included in common with “jp” is extracted. Then, as illustrated in FIG. 9B, the extraction unit 161 stores the extracted character string in the extraction history 164 and notifies the spam character suppression unit 162 of the extracted character string “meiwaku”.

  The junk mail suppression unit 162 receives the character string “meiwaku” from the extraction unit 161, updates the received rejection character string 165 by overwriting with the received character string, as shown in FIG. The latest reception rejection character string “meiwaku” is transmitted to 20. Thereafter, the mobile phone 10 can refuse to receive an e-mail transmitted from an e-mail address including “meiwaku”.

  The stored mail confirmation unit 163 confirms whether or not a mail address including the updated reception rejection character string “meiwaku” exists in the reception folder 152. In the reception folder 152, there is a mail address “meiwakui@dummy.ne.jp” including “meiwaku”. Now, since “meiwaku” is set as the reception rejection character string, the email sent from “meiwakui@dummy.ne.jp” can no longer be received. Therefore, the stored mail confirmation unit 163 sets the mail address “meiwakui@dummy.ne.jp” as the designated reception address, and transmits it to the mail server 20. As a result, it is possible to refuse reception of e-mails transmitted from other e-mail addresses including “meiwaku” while continuing to receive e-mails transmitted from “meiwakui@dummy.ne.jp”.

  As described above, the mobile phone 10 creates a reception rejection character string and transmits it to the mail server 20 simply by performing an operation of moving the electronic mail that seems to be the spam mail to the spam mail folder 155. Furthermore, each time an e-mail is stored in the junk mail folder 155, a common character string is extracted. Therefore, the number of junk mail that can be gradually rejected increases, and the reception of junk mail can be rejected efficiently. it can.

In addition, a user who is troublesome in the conventional setting operation for spam mail may perform a setting to uniformly reject reception of all Internet mail. By performing this setting, it is possible to reject reception of all electronic mails transmitted via the Internet.
However, if this setting is made, it becomes impossible to receive e-mails required by the user. Therefore, when the user makes this setting, the mail address that needs to be received needs to be separately registered in the mail server as the designated reception address. This operation is quite complicated for the user because it is necessary to input the mail address one character at a time or to copy and paste all necessary mail addresses.

On the other hand, the mobile phone 10 has the stored mail confirmation unit 163, so that the user can enter the email stored in the reception folder 152 without performing a complicated operation such as inputting a mail address character by character. Can be registered as a designated receiving address by regarding the sender as a necessary mail address.
By the way, if the extraction unit 161 extracts a common part in units of one alphabetic character, there is a possibility that any mail address may be subject to reception rejection. Therefore, the extraction unit 161 of the present embodiment extracts a common part from the mail address according to the following rules.

First, the extraction unit 161 divides a mail name from the beginning into a user name, an at sign, and a domain name. Further, the domain name is divided into a plurality of levels of subdomain names separated by periods.
Next, the extraction unit 161 extracts a part common to the character string to be compared from the head of the mail address, with the user name and subdomain name of the mail address as the minimum unit.

  At this time, the extraction unit 161 does not extract the top level domain located at the end of the domain name alone. That is, “jp”, “com” and the like are not extracted alone. If the second level domain is shared in addition to the top level domain, it is extracted by a combination of the second level domain and the top level domain, such as “mail.jp” or “dummy.com”. .

By extracting a character string according to such a rule, the mobile phone 10 can reject reception of junk mail while suppressing reception of necessary electronic mail from being rejected.
In addition, it is assumed that the user mistakenly stores an e-mail that is not a junk mail in the junk mail folder 155. In such a case, the user can deselect the junk mail by returning the e-mail from the junk mail folder 155 to the reception folder 152. Hereinafter, a description will be given with reference to FIG.

As shown in FIG. 10A, when an e-mail whose e-mail address is “bee@meiwaku.bee.jp” is accidentally selected as a junk e-mail, the user receives the e-mail again in the received folder. Move to 152.
At this time, “info@aaa.meiwaku.mail.jp”, “meiwaku.mail.jp”, and “meiwaku” are stored in the extraction history 164 of the extraction unit 161 as shown in FIG. Yes. The extraction unit 161 reads “meiwaku.mail.jp”, which is a character string extracted immediately before “meiwaku” set in the reception rejection character string 165 of the junk mail suppression unit 162, from the extraction history 164. Then, the junk mail suppression unit 162 is notified.

When receiving the character string “meiwaku.mail.jp” from the extraction unit 161, the spam mail suppressing unit 162 overwrites the reception reject character string 165 with “meiwaku.mail.jp” as shown in FIG. The latest reception rejection character string “meiwaku.mail.jp” is transmitted to the mail server 20.
Thereby, the reception refusal character string “meiwaku” set in the mail server 20 can be returned to “mwaiku.mail.jp”, which is the character string extracted immediately before. Therefore, the mobile phone 10 can continue to receive e-mails transmitted from “bee@meiwaku.bee.jp”.

<5. Other variations>
As mentioned above, although the embodiment of the mobile phone which is an aspect of the mobile communication terminal of the present invention has been described, the illustrated mobile phone can be modified as follows, and the mobile communication terminal of the present invention is the above-described embodiment. Of course, the mobile phone is not limited to that shown in the form.
(1) In the above-described embodiment, there is a configuration in which selection of junk mail and deselection of junk mail are realized by a user performing an operation of moving an e-mail between the reception folder 152 and the junk mail folder 155. Was. However, operations for selecting junk mail and deselecting junk mail are not limited to this. An operation for the user to select an e-mail address to be rejected in the future and an operation to cancel the selection are sufficient.

For example, the user may select junk mail by selecting one electronic mail stored in the reception folder 152 and performing an operation of adding a junk mail flag. Moreover, you may cancel selection of a spam mail by performing operation which deletes a spam mail flag from this electronic mail.
(2) In the above embodiment, the latest reception rejection character string is held in both the extraction unit 161 and the junk mail suppression unit 162. However, this configuration is not essential.

  For example, the junk mail suppression unit 162 may be configured to discard the reception rejection character string held therein after transmitting the reception rejection character string to the mail server 20. The extraction history 164 of the extraction unit 161 holds the same character string as the reception refusal character string transmitted to the mail server 20 as the latest extraction history. Therefore, it is not essential for the junk mail suppression unit 162 to hold the reception rejection character string.

(3) In the above embodiment, the stored mail confirmation unit 163 has a configuration for extracting the designated reception address. However, the stored mail confirmation unit 163 is not an essential component.
Instead of providing the stored mail confirmation unit 163, the user may be notified of the set reception refusal character string. For example, as shown in FIG. 11, the mobile phone 10 has “Meiwaku” is set as a reception rejection character string. Mails sent from mail addresses including “meiwaku” can no longer be received. ” The message 170 like this may be displayed on the touch panel 103. In this way, by notifying the user of the set reception refusal character string, the user himself / herself can register a necessary mail address as the designated reception address even if the stored mail confirmation unit 163 is not provided.

Even when the mobile phone 10 includes the stored mail confirmation unit 163, the mobile phone 10 displays the message 170 shown in FIG. 11 on the touch panel 103 and notifies the user of the reception refusal character string. It may be configured.
(4) In the above embodiment, the mobile phone 10 has a configuration that suppresses the rejection of the reception of an e-mail required by the user by setting the designated reception address by the stored mail confirmation unit 163. Was. However, the stored mail confirmation unit 162 may be configured to correct the reception rejection character string set by the junk mail suppression unit 162 instead of setting the designated reception address.

  For example, when the set reception rejection character string is “meiwaku” and the email address of the friend stored in the reception folder 152 is “meiwakui@dummy.ne.jp”, the stored email confirmation unit 163 , By returning the reception rejection character string to the previous “meiwaku.mail.jp”, or by setting two “meiwaku.mail.jp” and “@meiwaku” as the reception rejection character string, It is possible to suppress the reception of the electronic mail required by the user from being rejected.

As described above, the stored mail confirmation unit 163 only needs to have a function of preventing the reception of the electronic mail required by the user from being rejected by some method.
(5) In the above embodiment, the extraction unit 161 has a configuration in which the top level domain is excluded from the targets to be extracted alone. However, the character string extraction rule described in the above embodiment is an example. For example, the extraction unit 161 may be configured to exclude the combination of the second level domain and the top level domain from the object to be extracted alone. The second level domain is a subdomain of the top level domain. As a result, since “co.jp” and “ne.jp” are not extracted alone, the mobile phone 10 receives spam mails while suppressing the rejection of necessary e-mails. It becomes possible to refuse.

Moreover, the structure which a user selects what kind of character string is extracted may be sufficient.
(6) The mobile phone 10 described in the above embodiment has been described using a so-called smartphone including a touch panel 103 in which an input device and a display device are integrated as a specific example. However, it goes without saying that the mobile phone 10 is not limited to a smartphone. The mobile phone 10 may be a conventional multi-function mobile phone (so-called feature phone) using a keypad as an input device.

Furthermore, the mobile communication terminal according to the present invention is not limited to a mobile phone. The portable communication terminal according to the present invention is at least a portable terminal having a function of receiving electronic mail. For example, the mobile communication terminal according to the present invention may be a tablet terminal, a PDA (Personal Digital Assistant), a portable game machine, or the like.
(7) In the above embodiment, the junk mail suppression unit 162 of the mobile phone 10 transmits the junk mail filter setting to the mail server 20, and the mail server 20 receives the e-mail based on the received junk mail filter setting. Has a function to determine whether or not to deliver.

However, the junk mail suppression unit 162 of the mobile phone 10 is set by holding the junk mail filter setting in its own storage unit 105 instead of sending the junk mail filter setting to the mail server 20. You may have the function to judge the e-mail reception possibility itself using conditions.
FIG. 12 is a sequence diagram of the email delivery process executed by the email system 1 in this case.

First, the mail server 20 receives an e-mail addressed to the mobile phone 10 transmitted from the transmission source terminal 40 (step S201). The mail server 20 stores the received electronic mail in the mailbox of the mobile phone 10 (step S202), and notifies the mobile phone 10 that new mail has been received (step S203).
When receiving an incoming call notification from the mail server 20, the mobile phone 10 transmits a mail header reception request to the mail server 20 (step S204). When receiving the mail header reception request from the mobile phone 10, the mail server 20 reads the mail header of the email from the mailbox (step S205) and transmits it to the mobile phone 10 (step S206).

As described above, the mail header includes a mail address indicating the transmission source of the electronic mail. Therefore, the spam mail suppression unit 162 of the mobile phone 10 determines whether or not the acquired mail address clears the spam filter condition.
Specifically, the junk mail suppression unit 162 determines whether the mail address of the transmission source terminal 40 is registered in the designated reception list 180 held in the storage unit 105. If the mail address of the sender terminal 40 is registered in the designated reception list 180, it is determined that the junk mail filter condition is cleared.

When the mail address of the transmission source terminal 40 is not registered in the designated reception list 180, the junk mail suppression unit 162 determines whether or not the reception rejection character string is included in the mail address of the transmission source terminal 40. . If the e-mail address of the transmission source terminal 40 does not include a reception rejection character string, it is determined that the junk e-mail filter condition is cleared.
On the other hand, if the e-mail address of the transmission source terminal 40 is not registered in the designated reception list 180 and the e-mail address of the transmission source terminal 40 includes a reception rejection character string, the junk e-mail filter condition is set. Judge that it is not cleared.

If the condition for the junk mail filter has not been cleared (NO in step S207), the junk mail suppression unit 162 transmits the e-mail deletion request received in step S201 to the mail server 20 (step S221).
When the condition for the junk mail filter is cleared (YES in step S207), the junk mail suppression unit 162 transmits a mail text reception request to the mail server 20 (step S208). When the mail server 20 receives a mail text reception request from the mobile phone 10, the mail server 20 reads the mail text of the e-mail from the mailbox (step S209) and transmits it to the mobile phone 10 (step S210). When receiving the mail text from the mail server 20, the mobile phone 10 stores it in the reception folder 152 (step S211).

When receiving the deletion request from the mobile phone 10, the mail server 20 deletes the electronic mail stored in the mailbox (step S222).
Thus, the mobile phone 10 may have a function of determining whether or not an electronic mail can be received by itself.
(8) In the above embodiment, the selection of the junk mail has a configuration realized by the user performing an operation of moving the e-mail from the reception folder 152 to the junk mail folder 155. However, the mobile phone 10 may be configured to select junk mail without accepting a user operation.

For example, the mobile phone 10 determines whether or not the e-mail is junk mail based on the e-mail address of the received e-mail or the content of the mail text. You may have the function to store mail in the junk mail folder 155. FIG.
Also in this case, the extraction unit 161, the junk mail suppression unit and the stored mail confirmation unit 163 set the reception rejection character string described in the above embodiment, triggered by the fact that the e-mail is stored in the junk mail folder 155. And the specified reception address is set.

  Further, the mail server 20 may have a function of determining whether or not the e-mail is a junk e-mail based on the e-mail address of the received e-mail or the content of the e-mail text. In this case, when the mail server 20 determines that the received electronic mail is junk mail, the mail server 20 adds the junk mail flag to the e-mail and transmits it to the mobile phone 10. The mobile phone 10 may be configured to store the electronic mail in the spam mail folder 155 instead of the reception folder 152 when the electronic mail with the spam mail flag added is received.

  (9) Causes the mobile phone processor and various circuits connected to the processor to execute the processing (FIGS. 3, 5, 6, and 12 etc.) by the mobile phone shown in the above-described embodiments and modifications. Therefore, a control program composed of a machine language or high-level language program code can be recorded on a recording medium, or can be distributed and distributed via various communication paths. Such recording media include IC cards, hard disks, optical disks, flexible disks, and non-volatile memories such as flash memories. The distributed and distributed control program is used by being stored in a memory or the like that can be read by the processor, and the functions shown in the embodiment are realized by the processor executing the control program. It becomes like this. In addition to directly executing the control program, the processor may be compiled and executed or executed by an interpreter.

  (10) Each functional component (communication control unit 102, controller 104, control unit 106, extraction unit 161, junk mail suppression unit 162, stored mail check unit 163, etc.) shown in the above embodiment executes its function. It may be realized by a circuit that executes the program by one or a plurality of processors. Further, the mobile phone 10 shown in the embodiment may be configured as a package of an IC, an LSI, or another integrated circuit. This package is incorporated into various devices and used for use, whereby the mobile phone 10 realizes each function as shown in the embodiment.

  (11) You may combine said embodiment and said modification suitably suitably.

  INDUSTRIAL APPLICABILITY The present invention is useful as a technique for setting conditions for rejecting junk mail reception in industries that manufacture and sell mobile phones and that provide mobile phone services.

DESCRIPTION OF SYMBOLS 1 E-mail system 10 Mobile phone 20 Mail server 30 Gateway server 40 Source terminal 101 Antenna 102 Communication control part 103 Touch panel 104 Controller 105 Storage part 151 Mail storage part 106 Control part 161 Extraction part 162 Spam mail suppression part 163 Stored mail confirmation part 107 Receiver 108 Microphone

Claims (12)

A receiver for receiving e-mail;
A selection unit for selecting two or more emails from the plurality of received emails;
An extraction unit that extracts a character string that is commonly included in two or more e-mail addresses indicating a transmission source of each of the selected two or more e-mails;
The extracted character string is set as a reception refusal character string, and includes a spam mail suppressing unit that suppresses reception of an email transmitted from an email address including the reception refusal character string,
Each email address is composed of a user name, an at sign, and a domain name from the top, and the domain name is composed of a plurality of levels of domains including a top level domain that is separated by a period and located at the end. And
The extraction unit extracts a character string that is commonly included in the two or more e-mail addresses, with the user name constituting each e-mail address and the domain of each level excluding the top level domain as a minimum extraction unit. A mobile communication terminal characterized by The selection unit further selects one e-mail,
The extraction unit is a second character string that is commonly included in the mail address indicating the selected transmission source of the first electronic mail and the reception rejection character string set by the junk mail suppression unit. Extract the string
The mobile communication terminal according to claim 1, wherein the junk mail suppression unit updates the setting of the reception refusal character string with the extracted second character string. The portable communication terminal further includes:
A selection canceling unit for canceling the selection of the one email address;
The extraction unit includes a history holding unit that holds the extracted character string and the second character string,
When the selection canceling unit cancels the selection of the first mail address, the spam mail suppressing unit updates the setting of the reception rejection character string with the character string held in the history holding unit. The mobile communication terminal according to claim 2. The portable communication terminal further includes:
A mail storage unit for storing a plurality of received e-mails in a plurality of folders;
An input device that accepts user operations,
The selection unit selects the moved e-mail when the user moves the e-mail from the storage folder to the junk e-mail designation folder by operating the input device,
The selection canceling unit cancels the selection of the moved e-mail when the user moves the e-mail from the junk mail designation folder to the storage folder by operating the input device. The mobile communication terminal according to claim 3. The portable communication terminal further includes:
A mail storage unit for storing a plurality of received e-mails in a plurality of folders;
Save that compares the extracted character string with an e-mail address that indicates the sender of the e-mail stored in the save folder, and determines whether there is an e-mail address that includes the extracted character string With an email confirmation unit,
2. The spam mail suppressing unit, when it is determined that a mail address including the extracted character string exists, controls to receive an email transmitted from the mail address. The portable communication terminal as described. The spam mail suppression unit
Prior to the control to suppress the reception of the email sent from the email address including the reception rejection character string, the control for permitting the reception of the email sent from the email address registered in the reception permission list is performed.
When it is determined that there is an email address including the extracted character string, the email address transmitted from the email address is controlled to be received by registering the email address in the reception permission list. The mobile communication terminal according to claim 5, wherein: The spam mail suppression unit
When it is determined that there is an e-mail address that includes the extracted character string, the character string is corrected to a character string that is not included in the e-mail address. The mobile communication terminal according to claim 5, wherein the e-mail transmitted from the e-mail address is controlled so as to be received by setting the character string as the reception reject character string. The portable communication terminal further includes:
A display device for displaying information,
The portable communication terminal according to claim 1, wherein the spam mail suppressing unit further outputs the set reception refusal character string to the display device. The mobile communication terminal is connected to a mail server that performs transfer of e-mail and destruction of e-mail based on specified conditions,
The spam mail suppressing unit suppresses reception of an email transmitted from a mail address including the reception rejection character string by notifying the mail server of the set reception rejection character string. The mobile communication terminal according to claim 1. The spam mail suppression unit
When a mail address indicating the sender of the e-mail is received from a mail server holding the e-mail, and the reception rejection character string is included in the received mail address, the e-mail is sent to the mail server. If the reception reject character string is included in the received e-mail address, transmission is requested from the e-mail address including the reception rejection character string by not requesting the mail server to transmit the e-mail. The mobile communication terminal according to claim 1, wherein reception of received electronic mail is suppressed. A control method used in a mobile communication terminal including a receiving unit, a selecting unit, an extracting unit, and a junk mail suppressing unit,
A receiving step in which the receiving unit receives an email;
A selection step in which the selection unit selects two or more e-mails from the received plurality of e-mails;
An extraction step in which the extraction unit extracts a character string that is commonly included in two or more e-mail addresses indicating a transmission source of each of the selected two or more e-mails;
The junk e-mail suppressing unit sets the extracted character string as a reception rejection character string, and includes a junk e-mail suppression step for suppressing reception of an e-mail transmitted from an e-mail address including the reception rejection character string,
Each email address is composed of a user name, an at sign, and a domain name from the top, and the domain name is composed of a plurality of levels of domains including a top level domain that is separated by a period and located at the end. And
The extraction step extracts a character string that is commonly included in the two or more mail addresses, with a user name constituting each mail address and a domain of each level excluding the top level domain as a minimum extraction unit. A control method characterized by: A computer program used in a mobile communication terminal,
A receiving step for receiving e-mail;
A selection step of selecting two or more emails from the plurality of received emails;
An extraction step for extracting a character string that is commonly included in two or more mail addresses indicating a transmission source of each of the selected two or more e-mails;
Setting the extracted character string as a reception rejection character string, causing the mobile communication terminal to execute a junk mail suppression step for suppressing reception of an email transmitted from an email address including the reception rejection character string,
Each email address is composed of a user name, an at sign, and a domain name from the top, and the domain name is composed of a plurality of levels of domains including a top level domain that is separated by a period and located at the end. And
The extraction step extracts a character string that is commonly included in the two or more mail addresses, with a user name constituting each mail address and a domain of each level excluding the top level domain as a minimum extraction unit. A computer program characterized by:

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