Compare: Email Security Gateway. SMTP Outgoing Mail Gateways does not respond
Talk today about the postal gateway ScrollOutf1.. Why do he need what makes what features of use, etc.
It is placed indeed simply, only here is the understanding of the work of MTA you should have. I advise you to read / repeat the buckwari, especially about DNS: http://goo.gl/cyic6w
About Installation ScrollOutf1. I won't write a lot, especially since there is a ready-made distribution based on Debian. Put it, the only tip: During installation, all settings (except network) simply skip and slip forward .. All the rest is configured through the web interface. If you are particularly wise when installing, the web interface may not earn) all screenshots and so on, you can also see on off. Site.
Why do you need an email gateway? Basically like antispam. Or, for example, if you have two email servers on different domains domain.ru and domain.com with the same accounts on them - you can organize the duplication of the mail (it will come there and there). Also, users can send mail directly through it, there you can add all sorts of buns such as drim signatures and other things.
How it works? Very simple. Place the gateway, prescribe it as the main MX record on your domain. It will receive the mail and send it to the mail server, also users through this gateway will send the letters to the outside (optional, the gateway will add letters sent through themselves on the mail server in "sent"). You can use this email gateway on a plurality of domains, it is enough to specify it as a MX domain entry, while its original FQDN is not changed. If the sender should have a different reputation, then it is necessary for each at an external aipishnik. ScrollOutf1. It works only through the SMTP protocol (that is, POP and IMAP users will look like before the mail server, only the SMTP settings can be changed to the maidal gateway - it is optional).
Next, let's talk about the settings of the DNS ... mail.domain ... - this is a record, our mail server. SMTP.DOMAIN ... is a and MX record of our postal gateway. Register PTR record need to ask the provider (i.e., the owner of the IP).
DNS settings:
domain.com.
mail.domain.com \u003d 1.2.3.4 (a)
SMTP.DOMAIN.com \u003d 5.6.7.8 (A, MX)
Domain.com. 3600 in TXT "V \u003d SPF1 A MX -ALL" (SPF)
domain.ru.
mail.domain.ru \u003d 9.9.9.9 (a)
SMTP.Domain.com (MX)
domain.ru. 3600 in TXT "V \u003d SPF1 A MX -ALL" (SPF)
8.7.6.5.in-addr.arpa. In ptr smtp.domain.com. (PTR)
Mail operation scheme.. two mail servers, getting and sending through the gateway:
One mail server, receiving mail through the gateway, sending via mail server:
One mail server, receiving and sending mail via maidal gateway:
Well, a little about the web interface ScrollOutf1.:
Connect - Configuring the Server Network.
ROUTE - setting up mail servers, their FQDN and IP. Interesting options here - "Clone Incoming Emails ..." is a duplication of mail that I described above, also "Trusted Networks" (this parameter is directly directly in PostFix, your network is enabled there and the router is excluded, the router does not add anything and it will be Open Relay), well, as well as "Spam Trap" (see. Description, a useful thing).
Secure - security settings and antispite aggressiveness. Here also in Senders are white-black lists, and in Countries - a geographical filter. I have installed such level settings in Levels:
Collect is the main spam mailbox, all blocked spam and reports will come here. ScrollOutf1. Connects to this postage accounting via IMAP (accordingly, it should monitor it and the admin, dragging letters to one of the folders) and constantly checks the Good and Bad folders, where Bad - spam, and good - not spam. Letters listed in BAD teach antispam content, and the sender is automatically sent to the "Black List". With a good, the situation is reverse, and if you check the "Send False Positive Messages ..." checkbox, then when moving non-spam to the Good folder, the letter will be further sent to the recipient without changes.
Monitor - In this tab, you can monitor your mail in real time (very conveniently implemented, by the way) and analyze graphs, watch the server on the server.
Well, that's all, the rest is the same postfix + amavis. Additional dops of postfix manually work quite well, only after restarting the configs are overwritten on auto-generated. Therefore, it is enough to store a copy of the modified configs you need (PostFix Reload - restarts postfix with any config, and the Service PostFix Restart is a complete restart with auto-generating configs).
Well, everything seems to be :) I hope my notes will be useful to you.
PS.. as a mail server recommended iredmail ;)
This article discusses the configuration of the PostFix mail server as the organization's postal gateway. The most common cause for these actions is improving security, even if you do not use Exchange. Improving security is achieved due to the fact that no ports are open on the gateway, with the exception of SMTP and the mail messages are not stored on it. The worst that can happen - the attacker will receive a list of addresses email Your domain. Also, the gateway is used to filter spam, grainsting, scanning for viruses and some other useful actions.
On the Internet exists a large number of "Articles", which are very simplifying the process using the Directive "Relayhost \u003d Internalsmtp.example.com". In this case, the problem arises with the fact that the gateway does not know anything about internal addresses (even if it is configured to receive mail only for the @ example.com domain). It may arise, and the situation will necessarily arise during the spam attack when there will be a flow of letters to incorrect addresses that the external gateway is shifting to the internal mail server, it will spend time on processing, will dismiss the letter and send back to the gateway, etc. A large number of such messages will significantly reduce the performance of the mail server.
To correctly configure the postal gateway, it is necessary that it knows the correct internal addresses. In this case, any message containing a non-existent address is immediately cut off by the server, even before receiving the data.
Setting
In this article, we will not consider the PostFix installation, since this server is easily installed for most distributions, and you can find a large number of articles on this action.
/etc/postfix/main.cf.
As it should be clear from the title, this is the main configuration file PostFix.
Tip: The team below will show you all configuration directives, the values \u200b\u200bof which differ from the default:
Postconf -N.
Since only mail forwarding is required on the gateway, we turn off the local delivery of messages (Note: The empty configuration method of the directive means shutdown):
MyDestination \u003d Local_Recipient_Maps \u003d Local_Transport \u003d Error: Local Mail Delivery is Disabled
Install Directive myorigin. In the value of the domain to which Mail is sent:
Myorigin \u003d Example.com.
Directive MyNetworks \u003d Determine the networks that are allowed to transmit through this server. Usually here include only the inner local network, or in general, only an IP of the internal mail server:
MyNetworks \u003d 127.0.0.0/8, 172.16.42.0/24
This section prevents receiving messages for the addresses of the view. [Email Protected] to Match. We clearly define the domains for which you need to receive mail in the RELAY_DOMAINS directive below.
Parent_domain_matches_subdomains \u003d debug_peer_list, smtpd_access_maps
relay_domains \u003d In this directive, we define the domains for which you need to receive mail.
Relay_domains \u003d example1.com, example2.com, subdomain.example.com
sMTPD_Recipient_Restrictions \u003d Control the server actions after the RCPT to command.
SMTPD_Recipient_Restrictions \u003d Permit_Mynetworks, Reject_Unauth_Destination
transport_maps \u003d Indicate the connection between the domains and SMTP servers to which the mail will be sent.
Transport_maps \u003d hash: / etc / postfix / transport
relay_recipient_maps \u003d pointer to the file that will contain the email address list for which PostFix will receive messages.
Relay_recipient_maps \u003d hash: / etc / postfix / relay_recipients
show_user_unknown_table_name \u003d in the established value no. Returns the message "User Unknown" if the email address is not found. Used in bundle with relay_recipient_maps.
Show_user_unknown_table_name \u003d No.
Although the local mail delivery is captured, the mail gateway must take mail to postmaster and abuse addresses. To do this, define virtual aliases.
Virtual_alias_maps \u003d hash: / etc / postfix / virtual
/etc/postfix/master.cf.
This file determines determines the served postfix service. For full shutdown local delivery, edit this file And insert the # symbol at the beginning of the next line:
#Local Unix - N n - - Local
/ etc / postfix / virtual
In the case of a typical POSTFIX setting, the / etc / aliases file is used to send mail to other accounts or external addresses. However, since the local delivery is disabled, the modification of the ETC / ALIASES file will not bring the result. Therefore, we need to use the / etc / postfix / virtual file.
Postmaster [Email Protected] Abuse. [Email Protected] root. [Email Protected]
You can also use this file more widely. You can redirect mail to other addresses, create simple mailing lists or copy mail to another user and so on ..
[Email Protected] [Email Protected] [Email Protected] [Email Protected],[Email Protected],[Email Protected] [Email Protected] [Email Protected] [Email Protected] [Email Protected],[Email Protected]
/ etc / postfix / transport
This file determines the relationship between domains and servers, where mail must be sent for domain data.
Example1.com SMTP: Insidesmtp.example.com example2.com SMTP: insidesmtp.example.com subdomain.example.com SMTP: Insidesmtp.example.com
/ etc / postfix / relay_recipients
This file contains full email addresses, for which the gateway will receive messages.
[Email Protected] OK. [Email Protected] OK. [Email Protected] OK. [Email Protected] OK. [Email Protected] OK. [Email Protected] OK.
Fill the Relay_Recipient file addresses from Active Directory
This script requires the installed Perl and the NET :: LDAP module.
- Download the script with http://www-personal.umich.edu/~malth/gaptuning/postfix/getadsmtp.pl
- Edit the script in accordance with your values:
Create bases
To complete, we need to make hashized databases from files that are filled with us:
Postmap Hash: / etc / postfix / virtual postmap hash: / etc / postfix / transport postmap hash: / etc / postfix / relay_recipients
Note: Remember that you need to overheate the database after each file change ..
Restart PostFix.
Preferred way in order to postfix read configuration files following:
Postfix Reload.
Check
As you can see from the following example, this configuration works:
Telnet emailgateway.example.com SMTP. 220 emailgateway.example.com Esmtp Postfix Ehlo Localhost. 250-emailgateway.example.com 250-PipeLining 250-Size 10240000 250-VRFY 250-ETRN 250 8Bitmime Mail from:
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The device provides full-color scanning and digital data seal. The control panel allows you to scan black and white and color documents and send them to the specified email addresses in the form of attachments. Data Sending Functions Operate only when the device is connected to local network (LAN). The device can be connected to the local network directly.
The device cannot create color copies and print color documents, but full-color scanning with subsequent sending color images is supported.
Install email parameters
Before sending documents, you must configure the parameters of the device related to e-mail processing.
Note The following are instructions for setting up the device using the control panel. Similar procedures can be carried out in the built-in WEB server.
Supported protocols
The SMTP protocol is a set of program interaction rules that are sent and receive email. To send documents by e-mail, you need to connect the device to a local network that has the correct IP SMTP address. The SMTP server must also have Internet access.
When using a local network connection to obtain an IP address of the SMTP server, contact the system administrator. When connected using DSL to obtain an IP address, the SMTP server should contact the service provider.
The LDAP protocol is used to gain access to the information database. When using the LDAP protocol, the device is looking for a global list of email addresses. When entering an email address in LDAP, the automatic fill function is used, which supports the list of email addresses corresponding to the entered signs. When entering additional characters, a list of relevant email addresses. Mail is reduced.
The device supports the LDAP protocol, but the connection to the LDAP server is not required to send an email.
Note Change LDAP settings can only be using the built-in web server.
Setting email server settings
Learn the IP address of the SMTP server from the system administrator. In addition, this IP address can be defined in the device control panel. Then to hold manual setting IP addresses and test it, follow the procedures described below.
SMTP Gateway Address Setup
3. Select EL setup. Mail, then SMTP gateway.
4. Enter the SMTP gateway address in the form of an IP address or full domain name. If you do not know the domain name or IP address of the SMTP gateway, contact the network administrator.
5. Touch OK.
Testing SMTP Parameters
1. On the main screen, tap Administration.
2. Touch the initial setup.
3. Touch the email setup. Mail, and then checking the sending gateway.
If the configuration is correct, the message gateways appears on the control panel.
If the first test was successful, send a message by email using the digital data sending function. If the sent email message is obtained, it means that the function of digital data seal function has been successful.
If the message is not received, try to troubleshoot, following the following steps:
Check whether the address of the SMTP server and the message recipient are entered correctly.
Print the configuration page. Check if the SMTP gateway address is correct.
Make sure B proper work network. Send a letter to your email address from the computer. If the letter came, the network works fine. If the letter did not come, contact the network administrator or Internet service provider (ISP).
Run the Discover.exe file.
Search for gateways
If you do not know the SMTP gateway address, try to determine it using one of the methods described below.
Search SMTP gateway with MFP control panel
1. On the main screen, tap Administration.
2. Touch the initial setup.
3. Touch the email setup, and then search for sending gateways.
On the touchscreen A list of detected SMTP servers will appear.
4. Select the desired SMTP server and tap OK.
Search SMTP gateway using email application
Since most e-mail applications use SMTP Protocol to send electronic messages, And the LDAP protocol to address these messages may be able to find the host name of the SMTP gateway and the LDAP server in the email application settings.
Search for gateways using an email application may be difficult due to the inability to detect the SMTP working server if it uses Internet service provider services (ISP). Contact your Internet service provider to find out your email address.
Using the screen Sending email. mail
To navigate the function keys of the Email window. Mail, use the touch screen.
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Send email button. mail |
When you click on this button, the document scanning process and sending a file by email is started. Mail at the specified addresses. |
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Button Main screen |
When you click on this button opens the main screen. |
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Click this button and open the keyboard screen, then enter your email address. mail. If the system administrator has set the appropriate settings, then when you press this button, the default address can be inserted automatically. |
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Field to: |
Click this button and open the keyboard screen, then enter the email addresses. mail recipients scanned document. |
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Field Subject: |
Click this button and open the keyboard screen, then enter the subject of the message. |
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Button Advanced Functions |
When you press this button, the screen opens in which you can change certain email settings. Mail relating to the current scanning task. |
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Scroll bar |
Using the scroll bar, you can scroll and fill in the field of field copy:, hidden copy:, message and file name. Click on any of these fields to open the keyboard screen and make the required information in the field. |
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Address book buttons |
These buttons are used to make necessary information From the address book to fields to:, copy: or hidden copy :. |
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Help key |
Click this button to get help on the control panel. |
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Error / warning button |
This button appears only if an error or warning occurs in the status bar. When you press this button, a pop-up window opens with information that can help eliminate the error or eliminate the alarming situation. |
Basic Email Functions
Support data transfer device by email provides the following features:
Sending documents into several email addresses, retaining time and shipping costs.
Delivery of black and white or color files. Files can be shipped in various formats that the recipient can process.
After scanning a document, it can be saved in the device's memory and send one or several email addresses in the form of an attachment. Digital documents can be sent in one of several supported graphic formats, such as .TFF i.jpg; This allows recipients to process files in various programs, depending on specific tasks. Documents are delivered to the addressees as close to the original; Subsequently, they can be printed, maintain or send to third parties.
The e-mail sending function only works when the device is connected to a valid LAN with SMTP support and Internet access.
Download documents
Documents can be scanned using a scanner glass or ADF device. The scanner glass and the ADF device allow you to work with the original formats such as Letter, Executive, A4 and A5. In addition, the ADF device can be configured to work with the original Legal format. Small originals, receipts, shabby and non-standard documents, bonded documents, bent documents and photographs need to be scanned on the scanner glass. Multi-page documents Leggo is scanned using the ADF device.
Sending documents
The device can scan both black and white and non-ferrous originals. The default scan settings can be reconfigured, and the format of sent files is to change. The default parameters are listed below:
PDF (To view the attachment on the recipient's computer, the Adobe Acrobat viewer must be installed
Sending a document
2. On the main screen, tap email. post office.
3. On request Enter the username and password.
4. Fill in the fields from:, to whom: and Topic:. Scroll down the screen down and, if necessary, fill in the copy fields:, SC: and the message. In the field from: The default information or username should be displayed. If this field contains the default information, it is likely to be changed.
5. Touch Advanced Options to change the parameters of the document being sent (for example, the original format of this document). When sending a bilateral document, you must select the parties and option with a bilateral original.
6. Click Start to start sending.
7. Upon completion, remove the document from the ADF device or from the scanner glass.
Using the automatic fill function
When entering characters in a field to:, a copy: or from: The automatic filling function is started on the "Sending by Email" screen. During the input of the desired address or name on on screen keyboard MFP automatically browsing the list of the address book and displays the first address or name, the beginning of which coincides with the characters already entered. In the event that this address or name completely coincides with the address or name, the further input can be stopped, touching the key input keys on the touch keyboard. Otherwise, you should continue entering the address or name until the automatic fill function finds the desired entry in the address book. If the entered characters do not coincide with the records in the address book list, the automatic fill text will be removed from the screen. This means that the input address is missing in the address book.
The address book
Sending email messages to multiple recipients simplifies the address book provided in the device. For instructions for setting up Address list Contact your system administrator.
The ability to create and manage the address book also provides for a built-in WEB server. For more information, see Built-in Web Server.
Create a list of recipients
1. On the main screen, press EL. post office.
2. Perform the operations of one of the following steps:
Click to: To open the keyboard screen and type email addresses. recipient mail. When you enter several addresses, it follows them with a semicolon, or by pressing the ENTER key on the touchscreen.
Using the address book.
but. Open the address book. To do this, send messages by email on the screen. Mail Press the address book button ().
b. Navigating the address book is carried out using the scroll bar. To quickly scroll the list, press and hold the arrow key.
in. Highlight the name of the recipient and click the Add button.
You can also choose a mailing list. To do this, press the drop-down list located at the top of the screen, and then press all or add the recipient from the local list. To do this, click Local in the drop-down list. To add names to the recipient list, select the appropriate names, then press.
To remove the recipient from the list, scroll through the list, select the recipient and click the Delete button
3. The names in the list of recipients are placed in the text string of the keyboard screen. If necessary, you can add the recipient who was not found in the address book using the email address from the keyboard. After the recipient list comes with the desired view, click OK.
4. Click OK.
5. If necessary, fill in the copy fields: and the subject: in the Sending Email message window. mail. List of recipients can be viewed by pressing the down arrow in the text string to whom :.
6. Press the Home key.
Work with a local address book
The local address book is designed to store frequently used email addresses. The local address book can be shared by several MFPs addressed to the same server for access to HP Digital Sending software.
You can use the address book when entering email addresses to fields from:, to whom:, copy: or SC:. You can also add or delete addresses from the address book.
To open the address book, tap the address book button.
Adding email addresses to the local address book
1. Touch the local one.
2. Touch the name field, the keyboard screen will appear with which you enter the name for new String. Touch OK.
The value of the "Name" field is a pseudonym email address. If you do not enter the name of the pseudonym, then the email address will appear as a pseudonym.
3. Touch the Address field, the keyboard screen will appear with which you enter the email address for a new line. Touch OK.
Deleting email addresses from address book
Unused email addresses can be deleted.
To change the email address, you should delete this address, then add it to the local address book in the form of a new address.
1. Touch the local one.
2. Touch one or more email addresses you want to delete.
The following message will appear: Delete selected addresses?
3. Touch Yes to delete selected email addresses, or not to return to the address book screen.
Scanning with saving in the folder
This device feature is available only in HP LaserJet M5035 MFP models.
The device can scan the file and send it to the network folder if the administrator made this feature available. Supported oS For storage folders: Windows 2000, Windows XP, Windows Server 2003 and Novell.
It is possible in order to use this feature, you will need to enter the username and password, or save the files of the scanned documents in specific folders. Additional information can be obtained from the system administrator.
1. Place the document face down on the glass scanner or front side up to the ADF device.
2. On the main screen, click Network Folder.
3. In the folder list for quick access Select the folder in which you should save the document.
4. Press the File Name field. To open the pop-up screen with the keyboard and type the file name.
5. Click send to the network folder.
Scanning tasks to the operation of operations flow
This function of MFP based on additional software Digital Sending Software (DSS) is supported only by MFP models HP LaserJet M5035.
If the system administrator has activated the operation of the operation stream, the user can scan the document and immediately send it to the specified destination. This feature allows you to send additional information along with the scanned document to the specified network location or the FTP address. In this case, an input invitation will be displayed on the control panel display. for more information. System Administrator Also, a printer can assign as a destination as a user, by performing a document scanning, can immediately send it to print in a network printer.
1. Put the document on the glass scanner face down or place the front side of the ADF device.
2. On the main screen, tap the order of operations.
3. Select destination where you want to scan the document.
4. In the text box, enter the data that must accompany the scanned file and then tap the order of execution of shipment operations.
How does e-mail security gateway work?
Email Safety Gateway offers a reliable technology infrastructure that protect from these postal threats. In essence, this is a firewall for your email, which scans both outgoing and an incoming email for malicious content. At a minimum, most of the protected gateways offer at least four security features: blocking viruses and malicious programs, spam filtering, content filtering and e-mail archiving. Let's look at these features in more detail:
Blocking viruses and malicious programs
Emails infected with viruses or malware can be approximately 1% of the entire email obtained by the Organization. To make a secure mail gateway effectively prevented these letters to their intended recipients and the delivery of their useful data, it must scan every email and constantly be aware last models and threat characteristics.
Spam filtering
Want to believe, you want no, but the spam filtering is something that most computing power of the secure email gateway is concentrated. Spam is blocked by several different ways. Basic spam filtering typically includes pre-filtering technology, which blocks or places any emails received from known spammers to quarantine. Spam filtering also allows you to detect templates that are usually found in spam emails, such as preferred keywords used by spammers, and the inclusion of references that can bring email recipient to a malicious site when pressed. Many mail clients also allow users to mark spam messages coming in their mailbox and block senders.
Content filtration
Content filtering is usually applied to outgoing email sent by users within the company. For example, you can configure your secure email gateway to prevent sending certain confidential documents to an external recipient, or install blocks for image files or defined. keywords In them sent through the email system.
Email archiving
Email service, whether cloud or local, should be effectively managed. Storage was a problem for email administrators over the years, and, although you can have almost an infinite accessible cloud storageEmail archiving can help manage both user mailboxes and the effectiveness of your systems. Compliance with the requirements is also a serious problem for many companies, and archiving e-mail is mandatory if you need to store email within a certain period of time.
MFP e-mail functions allow you to send scanned documents directly to electronic mailboxes (on email), converting information on paper to digital images that can be used together, save and modify. It eliminates the user MFP. From the need to first create and save an electronic copy of a paper document, and then send it using mail client. Now means MFP. All this can be done in one step.
On the page Email Settings You can enable and configure email sending functions for mFP..
1. To enable the "Email Email" function, click "Email Settings".
2. Transferring messages by email tools MFP. Exercised through the SMTP gateway server. To specify the SMTP gateway server, enter the following SMTP Gateway Parameters:
· In the drop-down list Email Email ... Select a way to send messages by email:
When choosing an option Email messages will be sent to the SMTP gateway server using Digital Sending (using the settings on the Email Settings page). This method requires an additional step to send data by email with MFP.But it uses a more powerful email delivery mechanism.
When choosing an option directly S. mFP. Email messages are sent to the SMTP gateway server directly from MFP. You must configure the following information:
· In the window SMTP Device Gateway: Enter the IP address or host name of the SMTP gateway, which will handle email requests from MFP.. If the IP address or host name of the SMTP gateway is unknown, click Search for gatewaysto search in the network of a suitable SMTP gateway server (if available).
Note. Some models MFP. Recognize only IP addresses. In such cases, host names are converted to suitable IP-address.
· In the window PORT: Enter the TCP / IP port number on which the server processes SMTP requests. The port 25 is in this port 25.
· In the drop-down list Maximum embedding size Choose maximum size Email attachments supported by the SMTP gateway server. If with MFP. You must send an attachment, the size of which exceeds the maximum allowable, the attachment will be divided into smaller files to be sent by several letters.
· Press the button Test To verify the performance of the specified SMTP gateway server.
Note. In old MFP models option through digital sending service It is the only possible. Other models MFP. can only support the option directly with MFP..
3. If on this MFP. The authentication function is not enabled, the user must enter the email address in the field " From:"On the MFP control panel to send a message (to specify the sender of the message). If the user has not entered the email address, MFP uses Address "From:" by default:
· In the window Email address Enter the default sender email address.
· You can also enter Screen name. The name entered here will be displayed in the "From:" field when you first turn on the "Email Email" function by the MFP user. This field can be used to display instructions for the MFP user (such as: "Enter the email address to this field").
Note.If a Display namenot specified, the value entered in the field Address email will be shown in the field " From:" .
· To prohibit the user MFP. change the field value " From:", Check the Function Checkbox To prohibit the user of the device to change the address "From:" used by default. This will deprive the user to substitute other data in the field.
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