JP2007011431A - E-mail transmission device and e-mail transmission control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology for reducing user's mistake in specifying destination of e-mail. <P>SOLUTION: A number of transmission checking section 52 refers to a condition relating to the upper limit of the number of mail address to which mails can be transmitted at a time and checks whether the number of mail address received by a TO column destination reception section 42, a CC column destination reception section 44 and a BCC column destination reception section 46 exceeds the upper limit or not. A transmission propriety determination section 50 refers to a condition relating to propriety of transmission of mail to the mail address of the destination, and determines whether the transmission of the mails to the mail addresses received by the TO column destination reception section 42, the CC column destination reception section 44 and the BCC column destination reception section 46 is possible or not. A conversion section 48 converts the mail addresses received by the TO column destination reception section 42 or the CC column destination reception section 44 are converted to the BCC column. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electronic mail processing technique, and more particularly, to a method for controlling transmission of electronic mail and an electronic mail transmission apparatus that can use the method.

When an e-mail is transmitted using a general e-mail client application, the user can select three types of the TO column, CC column, and BCC column as the destination of the e-mail according to the purpose (for example, , See Patent Document 1). Since the mail address specified in the TO field and CC field is shown to the recipient, the receiver can see who the same e-mail was sent to, but the mail address specified in the BCC field Is not shown to the recipient. For this reason, the BCC column is often used to send an e-mail without disclosing the e-mail address of another destination to the recipient from the viewpoint of protecting personal information. For example, in a commercial campaign or the like, a plurality of customer or potential customer email addresses may be designated in the BCC column, and the sender email address may be designated in the TO column for transmission.
JP 2001-325187 A JP 2004-145418 A JP-A 63-146538

  However, in such a case, a human error may occur when an e-mail is created and the destination e-mail address is written in the TO column or the CC column instead of the BCC column and transmitted. Nowadays, there is a strong demand for the protection of personal information. Such human error can violate the law, and otherwise it can be a problem that the social credibility of companies decreases.

  In addition, when a plurality of mail addresses are described in the TO column or CC column of the received e-mail, when it is desired to reply only to a specific mail address, it may be mistakenly replied to everyone. In this case, since information that is not desired to be known by other people is transmitted to an unintended partner, a serious situation may occur.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a technique for reducing user mistakes in specifying an e-mail destination.

  In order to solve the above-described problem, an electronic mail transmitting device according to an aspect of the present invention includes a first destination receiving unit that receives a mail address to be designated as a first destination in a format in which a destination mail address is indicated to a recipient. A second address accepting unit that accepts an e-mail address to be designated as the second address in a format in which the recipient's e-mail address is hidden by the recipient, and an e-mail address that can be designated as the first or second address, respectively. A condition holding unit that holds a condition relating to the upper limit of the number of emails, and whether or not the number of e-mail addresses respectively designated as the first or second destination exceeds the upper limit held in the condition holding unit The number of e-mail addresses designated as the first or second destination by the transmission number check unit and the transmission number check unit exceeds the upper limit held in the condition holding unit, respectively. When it is determined that includes a notification unit for notifying the fact to the user.

  Yet another embodiment of the present invention is also an electronic mail transmission device. The apparatus includes a first destination receiving unit that receives a mail address to be designated as a first destination in a format in which the destination mail address is indicated to the recipient, and a first address in a format in which the destination mail address is secret to the receiver. A second address receiving unit that receives an e-mail address to be specified as the second address, a condition holding unit that holds a condition regarding whether or not an e-mail can be transmitted to the e-mail address specified as the first or second address, A transmission permission / inhibition determining section that determines whether or not an email can be transmitted to the mail address designated as the first or second destination with reference to the condition regarding the permission of transmission held in the condition holding section; When it is determined by the availability determination unit that transmission of an e-mail to the e-mail address designated as the first or second destination is impossible, a message to that effect is sent to the user. And a notification unit for notifying to.

  Yet another embodiment of the present invention is also an electronic mail transmission device. The apparatus includes a first destination receiving unit that receives a mail address to be designated as a first destination in a format in which the destination mail address is indicated to the recipient, and a first address in a format in which the destination mail address is secret to the receiver. A second destination receiving unit that receives a mail address to be designated as the second destination, and a condition holding unit that holds a condition regarding whether or not to convert the mail address designated as the first destination into the second destination And a conversion unit that changes the mail address received by the first destination receiving unit to the second destination in accordance with the conditions held in the condition holding unit.

  Yet another embodiment of the present invention is also an electronic mail transmission device. The apparatus includes a first destination receiving unit that receives a mail address to be designated as a first destination in a format in which the destination mail address is indicated to the recipient, and a first address in a format in which the destination mail address is secret to the receiver. A second destination receiving unit that receives a mail address to be designated as the second destination, a condition holding unit that holds a condition for controlling transmission of an e-mail, and the condition holding unit, the first or second When conditions regarding the upper limit of the number of e-mail addresses that can be designated as destinations are set, it is determined whether or not the number of e-mail addresses respectively designated as the first or second destination exceeds the upper limit. A condition regarding whether or not to send an e-mail to the e-mail address designated as the first or second destination is set in the number-of-transmission checking section and the condition holding section. In addition, referring to the condition, a transmission permission determination unit that determines whether or not to transmit an email to the mail address designated as the first or second destination, and the condition holding unit include the first destination. A conversion unit that changes the e-mail address received by the first destination receiving unit to the second destination when a condition for converting the e-mail address designated by the first e-mail address to the second destination is set; .

  It should be noted that any combination of the above-described constituent elements and a representation of the present invention converted between a method, an apparatus, a system, etc. are also effective as an aspect of the present invention.

  ADVANTAGE OF THE INVENTION According to this invention, the technique which reduces a user's mistake in the address designation of an electronic mail can be provided.

  In the embodiment, a technique capable of reducing the occurrence of a destination setting error in the transmission of an e-mail will be described. Specifically, the e-mail client according to the embodiment has the functions listed below. First, an upper limit is set for the number of destinations that can be transmitted at once, and a warning is given if the upper limit is exceeded. Further, whether or not to send an e-mail to a destination mail address is set, and a warning is given when a destination that cannot be sent is specified. Further, the mail address specified in the TO field or CC field where the destination mail address is presented to the recipient is converted into a BCC field where the destination mail address is not presented to the recipient. With these functions, human error such as sending an e-mail to an incorrect destination or sending an e-mail by mistakenly specifying an e-mail address to be specified in the BCC column in the TO column or the CC column. Generation can be reduced.

  FIG. 1 shows a configuration of an e-mail transmission / reception system 10 including an e-mail client 20 which is an example of an e-mail transmission apparatus of the present invention. An e-mail transmission / reception system 10 connects an e-mail client 20 that operates on a user's terminal, an e-mail reception server 12 that controls the reception of e-mails, and an e-mail transmission server 14 that controls the transmission of e-mails. Internet 16 is included. The e-mail receiving server 12 is realized by a POP (Post Office Protocol) server or the like, and the e-mail transmitting server 14 is realized by an SMTP (Simple Mail Transfer Protocol) server or the like. The e-mail client 20 operates on a terminal device such as a personal computer, and transmits an e-mail created by the user to the e-mail transmission server 14 via the Internet 16 and addresses the user who has arrived at the e-mail reception server 12. An e-mail is received via the Internet 16.

  The email client 20 includes a reception unit 22, a display unit 24, a creation unit 26, a transmission unit 28, a condition setting unit 30, a condition holding unit 32, a reception book 34, and a transmission book 36. These configurations can be realized in terms of hardware by a CPU, memory, or other LSI of any computer, and in terms of software, they are realized by programs loaded into the memory. It depicts the functional blocks that are realized. Accordingly, those skilled in the art will understand that these functional blocks can be realized in various forms by hardware only, software only, or a combination thereof.

  The receiving unit 22 receives an incoming e-mail addressed to the user's mail address from the e-mail receiving server 12 via the Internet 16. The received e-mail is stored in the reception list 34. The display unit 24 displays the received electronic mail stored in the reception book 34 and the transmitted electronic mail stored in the transmission book 36. The creation unit 26 creates an email sent by the user. The created e-mail is transmitted to the e-mail transmission server 14 via the Internet 16 by the transmission unit 28 and stored in the transmission list 36.

  As will be described in detail later, the creation unit 26 has a function of converting a mail address specified in the TO field or the CC field into a BCC field. The transmitted mail is held in the transmission list 36 so as to be distinguishable from other transmitted mails. When presenting the transmitted mail stored in the transmission list 36, the display unit 24 presents the converted and transmitted mail and the other mail in an identifiable manner. Thereby, when the user confirms the sent mail, it is possible to identify the converted mail and the mail that has not been converted. For example, an e-mail address can be specified by mistake in the TO column or CC column, and an e-mail that has been converted to the BCC column and properly transmitted by the function of the present embodiment can be confirmed later.

  The condition holding unit 32 holds a condition for controlling transmission of the e-mail created by the creating unit 26 in order to realize the above-described function. The condition setting unit 30 presents an input screen for accepting setting of conditions from the user on the display unit 24, and stores the accepted conditions in the condition holding unit 32.

  FIG. 2 is a diagram showing an internal configuration of the creating unit shown in FIG. The creation unit 26 includes an editing unit 40, a TO column destination receiving unit 42, a CC column destination receiving unit 44, a BCC column destination receiving unit 46, a conversion unit 48, a transmission availability determination unit 50, and a transmission number check unit 52. These configurations can also be realized in various forms by hardware only, software only, or a combination thereof.

  The editing unit 40 displays the e-mail being edited on the display unit 24, receives an e-mail editing instruction from the user via a user interface (not shown), and edits the e-mail. The TO column address accepting unit 42 accepts designation of a mail address described in the TO column as an e-mail address. The CC field address accepting unit 44 accepts designation of an e-mail address described in the CC field as an e-mail address. The BCC field address accepting unit 46 accepts designation of a mail address described in the BCC field as an e-mail address. Since the mail addresses described in the TO field and the CC field are presented to the recipient of the e-mail, the TO field and the CC field are examples of the first destination, and the TO field address acceptance unit 42 and the CC field address acceptance The unit 44 is an example of a first destination receiving unit. Since the e-mail address described in the BCC column is confidential to the recipient of the e-mail, the BCC column is an example of the second destination, and the BCC column destination receiving unit 46 is an example of the second destination receiving unit. .

  The transmission number check unit 52 refers to the conditions related to the upper limit of the number of mail addresses that can be transmitted at one time held in the condition holding unit 32, and the TO column destination reception unit 42, the CC column destination reception unit 44, and the BCC column It is checked whether the number of e-mail addresses received by the address receiving unit 46 exceeds the upper limit. The transmission number check unit 52 executes the operation held in the condition holding unit 32 based on the checked result. The transmission permission / inhibition determination unit 50 refers to the conditions regarding whether or not mail can be transmitted to the destination mail address held in the condition holding unit 32, and the TO column destination reception unit 42, the CC column destination reception unit 44, and the BCC column destination It is determined whether or not it is possible to send a mail to the mail address received by the receiving unit 46. The transmission permission / inhibition determining unit 50 executes the operation held in the condition holding unit 32 based on the determination result. The conversion unit 48 converts the mail address received by the TO column destination receiving unit 42 or the CC column destination receiving unit 44 into the BCC column according to the conditions held in the condition holding unit 32. Details of these operations will be described below.

  FIG. 3 shows an example of a condition setting screen presented by the condition setting unit 30 to the user via the display unit 24. FIG. 3 shows a condition setting screen 60 for setting the upper limit of the number of mail addresses that can be transmitted at one time for each of the TO field, CC field, and BCC field. The user can input the upper limit of the number of addresses for each of the TO column, CC column, and BCC column. In addition, an operation when the upper limit is exceeded can be set.

  For example, when the user sets a condition of “not permitted”, the transmission number check unit 52 displays an error screen when the number of email addresses specified in the destination field exceeds the set upper limit value. Is output and mail transmission is prohibited. When the user sets a condition of “warning”, the transmission number check unit 52 inquires of the user whether or not to send a mail by outputting a warning screen. That is, the transmission number check unit 52 also functions as a notification unit. When the user sets the condition of “automatically convert to BCC”, the transmission number check unit 52 converts the mail address specified in the TO field and the CC field into the BCC field automatically. To instruct. Details of the operation of the conversion unit 48 will be described later. After the conversion unit 48 performs conversion, the transmission number check unit 52 may check the number of mail addresses again. When the user sets a condition of “doing nothing”, the transmission number check unit 52 permits transmission of an e-mail as it is even if the number of designated e-mail addresses exceeds the upper limit.

  By providing such a function, for example, if you want to reply only to a specific partner for an email that has been set with multiple recipients, an error will occur that will be mistakenly returned to everyone Can be checked. As a result, it is possible to effectively prevent mail from being transmitted to an incorrect destination. Also, even if you have been infected by a virus or worm that sends an e-mail without permission by selecting an e-mail address from an e-mail address book etc., you can check the number of transmissions and warn you Since transmission can be prohibited, the situation where an e-mail is transmitted without permission can be avoided or reduced. Moreover, since an upper limit can be set for each of the TO column, CC column, and BCC column, conditions can be set more flexibly and accurately.

  FIG. 4 shows another example of the condition setting screen presented by the condition setting unit 30 to the user through the display unit 24. FIG. 4 shows a condition setting screen 62 for setting whether or not to send an e-mail to the destination mail address for each of the TO field, CC field, and BCC field. The user can input a mail address or domain that can be transmitted and a mail address or domain that cannot be transmitted for each of the TO field, CC field, and BCC field. Further, it is possible to set an operation when a mail address that cannot be transmitted is designated. A regular expression may be used when describing an email address or domain.

  For example, when the user inputs an address or domain that can be transmitted for a certain destination field and sets a condition of “not permitted” as an operation when a mail address other than that is specified, the transmission permission / inhibition determination unit 50 When the e-mail address specified in the destination field does not match the set e-mail address or domain, an error screen is output and e-mail transmission is prohibited. When the user sets the condition of “warning”, the transmission permission / inhibition determination unit 50 inquires of the user whether or not to send a mail by outputting a warning screen. That is, the transmission permission / inhibition determination unit 50 also functions as a notification unit. When the user sets the condition “automatically convert to BCC”, the transmission permission determination unit 50 converts the mail address specified in the TO field and the CC field into the BCC field automatically. To instruct. Details of the operation of the conversion unit 48 will be described later. After the conversion unit 48 performs the conversion, the transmission availability determination unit 50 may determine again whether transmission is possible. When the user sets the condition of “doing nothing”, the transmission permission / inhibition determination unit 50 transmits the e-mail as it is even if a mail address other than the mail address set as the mail address that can be transmitted is designated. to approve.

  When the user inputs an address or domain that cannot be transmitted for a certain destination field and a condition of “not permitted” is set as an operation when a mail address that matches the address or domain is designated, the transmission permission / inhibition determining unit 50 When the e-mail address specified in the field matches the set e-mail address or domain, an error screen is output and e-mail transmission is prohibited. When the user sets the condition of “warning”, the transmission permission / inhibition determination unit 50 inquires of the user whether or not to send a mail by outputting a warning screen. When the user sets the condition of “doing nothing”, the transmission permission / inhibition determination unit 50 permits the transmission of the e-mail as it is even if the e-mail address set as the e-mail address that cannot be transmitted is specified.

  By providing such a function, for example, it is possible to check the occurrence of a mistake that erroneously replies to spam mail. As a result, it is possible to effectively prevent mail from being transmitted to an incorrect destination. Also, even if you have been infected by a virus or worm that sends an e-mail without permission by selecting an e-mail address from an e-mail address book etc., you can check the number of transmissions and warn you Since transmission can be prohibited, the situation where an e-mail is transmitted without permission can be avoided or reduced. In addition, since it is possible to set whether transmission is possible for each of the TO column, CC column, and BCC column, conditions can be set more flexibly and accurately.

  FIG. 5 shows still another example of the condition setting screen presented by the condition setting unit 30 to the user through the display unit 24. FIG. 5 shows a condition setting screen 64 for setting an operation mode (hereinafter referred to as “BCC mode”) for automatically converting the mail address specified in the TO field and CC field into the BCC field. The user can set a mail address to be specified in the TO column when setting the BCC mode. A condition for automatically setting the mail address of the sender described in the FROM field (usually the user's own mail address) in the TO field may be selected, or the mail address to be specified can be entered in the TO field. It may be set.

  When the user sets the BCC mode, the conversion unit 48 automatically designates the mail address specified in the TO field and the CC field in the BCC field and deletes the mail address specified in the TO field and the CC field. . When the mail address to be specified is set in the TO field, the conversion unit 48 automatically sets the mail address in the TO field. The conversion unit 48 may convert all mail addresses specified in the TO field or the CC field into the BCC field, or may select some mail addresses and convert them into the BCC field. For example, a mail address to be converted into the BCC field may be set in advance. In this case, when the mail address to be converted into the BCC field is specified in the TO field or the CC field, the conversion unit 48 converts the mail address into the BCC field. After the conversion unit 48 performs the conversion, the transmission number check unit 52 may check the number of transmission addresses, or the transmission availability determination unit 50 may determine whether transmission is possible.

  By providing such a function, for example, when it is desired to send the same mail to a plurality of destinations, the mail address is mistakenly described in the TO field or the CC field, and the mail address is another recipient. It is possible to effectively prevent occurrence of mistakes that are presented to the user.

  FIG. 6 shows an example of an error screen presented by the transmission number check unit 52 to the user through the display unit 24. FIG. 6 shows an error screen 66 presented by the transmission number check unit 52 when the number of mail addresses specified in the TO column exceeds the upper limit.

  FIG. 7 shows an example of a warning screen presented to the user by the transmission number check unit 52 by the display unit 24. FIG. 7 shows a warning screen 68 presented by the transmission number check unit 52 when the number of mail addresses specified in the TO column exceeds the upper limit. The user can select either disregarding the warning and transmitting as it is, or canceling the transmission. The transmission number check unit 52 may instruct the conversion unit 48 to convert the mail address specified in the TO column into the BCC column. Also in this case, the conversion unit 48 may automatically set a preset mail address in the TO field. In addition, after the conversion unit 48 performs conversion, the transmission number check unit 52 may check the number of transmission addresses, or the transmission availability determination unit 50 may determine whether transmission is possible.

  FIG. 8 is a flowchart showing the procedure of the e-mail transmission control method according to the embodiment. First, when the editing unit 40 edits an e-mail according to a user's instruction and is instructed to transmit, the transmission number check unit 52 sets the upper limit that the number of e-mail addresses designated as the destination is held in the condition holding unit 32 It is determined whether or not (S10). If the upper limit is exceeded (Y in S12), the transmission number check unit 52 presents an error screen or a warning screen according to the conditions held in the condition holding unit 32 (S24). At this time, the conversion unit 48 may convert the destination into the BCC field. When the upper limit is not exceeded (N in S12), the transmission permission determination unit 50 determines whether transmission is possible (S14). When it is determined that transmission is not possible (Y in S16), the transmission permission / inhibition determination unit 50 presents an error screen or a warning screen according to the conditions held in the condition holding unit 32 (S24). At this time, the conversion unit 48 may convert the destination into the BCC field. When it is determined that transmission is possible (N in S16), the conversion unit 48 further determines whether or not the BCC mode is set (S18). When it is in the BCC mode (Y in S18), the conversion unit 48 converts the mail address specified in the TO column or the CC column into the BCC column (S20). If it is the normal mode (N in S18), no conversion is performed. The e-mail created in this way is transmitted by the transmitting unit 28 (S22). When the transmission number check unit 52 or the transmission permission / inhibition determination unit 50 presents a warning screen, if the user selects transmission of e-mail (Y in S26), the process proceeds to determination of the BCC mode (S18), and the e-mail is received. Sent. When the user cancels the transmission of the e-mail (N in S26), the e-mail is not transmitted.

  The check of the number of transmission addresses, determination of whether transmission is possible, and conversion into the BCC column may be executed in any combination or order, or may be executed a plurality of times. For example, conversion to the BCC column may be performed first. In addition, after the conversion to the BCC column is performed, the number of transmission addresses may be checked again and the determination of whether transmission is possible. Thus, by combining the above-described functions, user errors can be reduced more effectively.

  The transmission number check unit 52, the transmission permission / inhibition determination unit 50, and the conversion unit 48 may execute the above-described processing when a destination is specified, or request the user to transmit an email edited by the editing unit 40. When this is done, the processing described above may be executed.

  In consideration of the case where the address is converted on the server side, such as a mailing list or a broadcast mail, the creating unit 26 actually transmits the mail when the address of the mailing list or the broadcast mail is designated as the destination. The server may be configured to inquire the server about the destination to be executed. Then, processing such as transmission number check, transmission permission / inhibition determination, BCC conversion, etc. may be performed on the mail address that is actually transmitted. Further, the e-mail client 20 may have a configuration for holding mail addresses of mailing lists and members of broadcast mail.

  The present invention has been described based on the embodiments. This embodiment is an exemplification, and it will be understood by those skilled in the art that various modifications can be made to combinations of the respective constituent elements and processing processes, and such modifications are also within the scope of the present invention. is there.

It is a figure which shows the structure of the email transmission / reception system containing the email client which concerns on embodiment. It is a figure which shows the internal structure of the preparation part shown in FIG. It is a figure which shows an example of the condition setting screen which the condition setting part showed to the user by the display part. It is a figure which shows another example of the condition setting screen which the condition setting part showed to the user by the display part. It is a figure which shows another example of the condition setting screen which the condition setting part showed to the user by the display part. It is a figure which shows the example of the error screen which the transmission number check part showed to the user by the display part. It is a figure which shows the example of the warning screen which the transmission number check part showed to the user by the display part. It is a flowchart which shows the procedure of the transmission control method of the email which concerns on embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 E-mail transmission / reception system, 12 E-mail reception server, 14 E-mail transmission server, 20 E-mail client, 22 Receiving part, 24 Display part, 26 Creation part, 28 Transmission part, 30 Condition setting part, 32 Condition holding part, 34 reception list, 36 transmission list, 40 editing section, 42 TO field destination reception section, 44 CC field destination reception section, 46 BCC field destination reception section, 48 conversion section, 50 transmission availability determination section, 52 transmission number check section.

Claims (7)

A first destination receiving unit that receives a mail address to be designated as a first destination in a format in which the destination mail address is indicated to the recipient;
A second destination receiving unit that receives a mail address to be designated as a second destination in a format in which the destination mail address is secret to the recipient;
A condition holding unit for holding a condition relating to the upper limit of the number of e-mail addresses that can be designated as the first or second destination,
A transmission number check unit for determining whether the number of e-mail addresses respectively designated as the first or second destination exceeds an upper limit held in the condition holding unit;
When it is determined by the transmission number check unit that the number of e-mail addresses specified as the first or second destination has exceeded the upper limit held in the condition holding unit, the fact is notified to the user. A notification unit;
An electronic mail transmitting device comprising: A first destination receiving unit that receives a mail address to be designated as a first destination in a format in which the destination mail address is indicated to the recipient;
A second destination receiving unit that receives a mail address to be designated as a second destination in a format in which the destination mail address is hidden by the recipient;
A condition holding unit for holding conditions relating to whether or not to send an e-mail to the e-mail address designated as the first or second destination;
A transmission permission / inhibition determination section that determines whether or not to transmit an email to the mail address designated as the first or second destination with reference to the condition regarding the permission of transmission held in the condition holding section;
When it is determined by the transmission permission / inhibition determination unit that transmission of an e-mail to the e-mail address specified as the first or second destination is impossible, a notification unit that notifies the user of the fact,
An electronic mail transmitting device comprising: A first destination receiving unit that receives a mail address to be designated as a first destination in a format in which the destination mail address is indicated to the recipient;
A second destination receiving unit that receives a mail address to be designated as a second destination in a format in which the destination mail address is hidden by the recipient;
A condition holding unit for holding a condition regarding whether or not to convert the mail address designated as the first destination to the second destination;
A conversion unit that changes the mail address received by the first destination receiving unit to the second destination in accordance with the conditions held in the condition holding unit;
An electronic mail transmitting device comprising: The condition holding unit further holds a mail address to be newly designated as the first destination when the conversion unit converts the mail address designated as the first destination into the second destination. ,
When the conversion unit changes the e-mail address designated as the first destination to the second destination, the conversion unit newly sets the e-mail address to be designated as the first destination held in the condition holding unit. The e-mail transmission device according to claim 3, wherein the e-mail transmission device is designated as a first destination.   The e-mail transmission device according to claim 4, wherein the conversion unit designates a mail address of an e-mail transmission source as the first destination. A transmission mail holding unit for storing the transmitted e-mail;
6. The e-mail transmission device according to claim 3, wherein the transmission mail holding unit holds the e-mail whose destination is converted by the conversion unit so that the e-mail can be distinguished from other e-mails. A first destination receiving unit that receives a mail address to be designated as a first destination in a format in which a destination mail address is indicated to the recipient;
A second destination receiving unit that receives a mail address to be designated as a second destination in a format in which the destination mail address is secret to the recipient;
A condition holding unit for holding conditions for controlling transmission of e-mail;
The mail address designated as the first or second destination when the condition holding unit has a condition regarding the upper limit of the number of mail addresses that can be designated as the first or second destination, respectively. A transmission number check unit for determining whether or not the number exceeds the upper limit;
When the condition holding unit is set with a condition regarding whether or not an e-mail can be transmitted to the e-mail address designated as the first or second destination, the first or second is referred to with reference to the condition. A transmission permission / inhibition determination unit that determines whether or not an email can be transmitted to a mail address designated as a destination of
When a condition for converting the mail address designated as the first destination into the second destination is set in the condition holding unit, the mail address accepted by the first destination accepting unit is set. A conversion unit for changing to the second destination;
An electronic mail transmitting device comprising:

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