client and run sudo update-exim4. To use a custom Exim configuration, you must enable the following settings in the Basic Editor section of WHM’s Exim Configuration Manager interface ( WHM » Home » Service Configuration » Exim Configuration Manager ): Reference /etc/mailhelo for outgoing SMTP By default exim does not trust users and does not allow users to override sender. There are so many things (firewall, network: subnets and security groups, PHP settings) that can cause problems to your routine Since version 4. First, let’s create a new email account. For each of the referenced sections, enter the information below that section into the corresponding boxes in the configuration editor. It is integrated with the WHM control panel and all of its settings are consolidated within the “ Exim Configuration Manager ” feature. php. Basic Configuration. Sep 2, 2022 · So the solution for me was: 1- Download the original exim4. The configuration page for Exim mail server can be found under Service Configuration in WHM Jan 4, 2024 · 🌐 Breaking News: CVE-2023-51766 Exim Vulnerability In a nutshell, CVE-2023-51766 exposes a critical weakness in Exim, a widely-deployed mail transfer agent utilized in Unix-like operating systems. Please select another Chapter 43 - Encrypted SMTP connections using TLS/SSL. Navigate to " Home / Service Configuration / Exim Configuration Manager . Feb 9, 2015 · and add the line. (Taking server1. This works great for emails that are sent out to external addresses from our Aug 4, 2016 · exim -bp | exiqsumm. Before you make any changes to cPanel’s Exim configuration, create a backup. This article serves as a review of the best practices for achieving a perfect email setup. If you are still struggling to get your setup working, please contact The SMTP Support Team for help. For convenience, as an additional method to whitelist addresses from being blocked, an explicit whitelist is read in from /etc/exim4/sender_local_deny_exceptions. For this tutorial, we are using one of our CentOS-based managed VPS hosting plans, pre-installed with minimal CentOS 7 OS. The exiqgrep help to avoid the complex combinations of flags and various sorting and pattern matching commands such as Mar 7, 2019 · Exim (Experimental Internal Mailer) is a mail transfer agent known for being a general and flexible mailer, with many tools for checking incoming email. There is no cryptographic code in the Exim distribution itself for implementing TLS. This chapter contains details of how SMTP is processed. Exim’s DKIM implementation allows to Sign outgoing messages: This function is implemented in the SMTP transport. If it can't deliver it immediately it enters the spool directory. Identifying the number of messages in the mail queue: #exim -bpc. This includes negative items, and so it is possible to exclude addresses from being blacklisted. " Under the " Basic Editor ," click the " Domains and IPs " tab. By default exim attempts to deliver an email immediately it arrives to try and avoid queueing it. Sep 19, 2023 · Author. Here are some best practices to consider: 1. Chapter 49 - SMTP processing. 2- Start the configuration using the command: dpkg-reconfigure exim4-config. 13 versions. Select “internet site; mail is sent and received directly using SMTP” option. Newer versions of MySQL require additional file descriptors for each open table. You can configure this Exim4 to use the Google's SMTP servers as its smarthost using your Gmail account. 0 or later). => Shows a normal message delivery for outgoing mail. This article explains the following topics, helpful in stopping spamming from a server (cPanel & Exim mail server): To configure Exim mail server in WebHost Manager. To install SendMail we need an active internet connection, after setting up your internet connection open the terminal and enter the following command in the terminal to install SendMail. com as an authenticated remote SMTP transport for all your non Debian uses Exim4 as a mail server by default. Web Client. # Perfect E-Mail Setup. EXIM's Transportation Division works with Qualified Business Aircraft Financing Advisors ("Qualified Advisors") retained by purchasers (or potential purchasers) of U. another mail server. Split configuration into small files > Yes. It permits reputation to be tracked on a per-domain basis, rather than merely upon source IP address. Configuration of exim4 on Ubuntu is similar. Reading exim log can be a confusing or complicated at first, however, having understanding of Summary of Fields, line fields, would help you understand your email server platform. Exim’s command line options are described in alphabetical order below. With the help of a third-party library, my PHP file can extract the subject, sender, recipient, attachments, etc. manufactured business aircraft and helicopters. answered May 24, 2016 at 11:13. default is sufficient for a host with simple mail requirements. Also Exim will be starting 30 queue runners (queue_run_max) every minute (Exim delivery retry time) and if email has multiple recipients – it will only handle 5 of them. without the option -i which will cause problems. You will be asked bout General type of mail configuration , Choose the option for “internet site” and select “Ok” to continue. See chapter 22 (about the redirect router) for the configuration needed to support this, and the separate document entitled Exim’s interfaces to mail filtering for user details. In such circumstances, most messages can be delivered immediately. Sep 28, 2020 · Scan outgoing mail with Apache SpamAssassin. Log into WHM as the 'root' user. Operating the set of rules is called filtering, and the file that contains them is called a filter file . You can test if you already have exim4 on your system: systemctl status exim4 Jun 21, 2024 · JailManager. If you want to send all mail for non-local domains to a “smart host”, you should replace the default dnslookup router with a router which does the routing explicitly: The default configuration file supplied with Exim as src/configure. The system uses the total number of open tables in your databases to determine this value. Advancedoffers the full set of Web collaboration features. Sending mail to a smart host. More examples and discussion can be found in the Exim book. Step 2: Installing SendMail. Click the Feb 23, 2010 · There are minor tweaks you can make to exim. The system will direct you to cPanel’s Email Disk Usage interface (cPanel » Home » Email » Email Disk Usage). Provide the server name for the Exim4 SMTP server. Read our Set Up Mail Client documentation for information on setting up a mail client. Exim has previously fallen victim to many attacks due to vulnerabilities. Add an A record: Click “Add record” again and add an MX record that points to the A record: Mar 4, 2020 · Introduction. Check that your config file looks like the below. For protocols, use the Options for OpenSSL text box. sudo vi /etc/exim4/update-exim4. It can co-exist with all other Exim features (including transport filters) except cutthrough delivery. exim -bh ipaddress This spoofs an SMTP transaction emanating from ipaddress. conf to remove SMTP authentication altogether, but you won’t find that information here. After completing exim installation, a pre-configuration is required to make exim working. Changes needed to the build configuration. Share. forward files, plus Exim-style . For example, +no_sslv2 +no_sslv3. So, type that to test, echo "Testing. Now, when I reply to those emails (so they get send back to my domain) I see a record that they appeared in /var/spool/mail, but cat doesn't seem like a very clever way to read it. This setting allows you to log sender rates in the Exim mail log. In a conventional Exim configuration, users are able to run private filters by setting up appropriate . This option causes Exim to reject all incoming mail that is addressed to a recipient domain that does not have a valid DNS entry. 04) to forward/redirect all e-mail on a domain to an external address. Selet the outgoing_spam_scan checkbox to enable the feature. 4 and is provided for illustration purposes only: Enter credentials that will allow Exim to access Exim extends this facility by allowing the forwarding instructions to be a set of rules rather than just a list of addresses, in effect providing “ . Feb 20, 2020 · By tuning these settings to better fit today’s internet, you can improve email deliverability. Now, click on the Advanced Editor tab under Exim Configuration Manager. The following configuration sets up Exim to send via a Smarthost, i. This file contains various settings, such as listening ports, routing rules, and access controls. Support for TLS (Transport Layer Security), formerly known as SSL (Secure Sockets Layer), is implemented by making use of the OpenSSL library or the GnuTLS library (Exim requires GnuTLS release 1. com : *. Sign in to EXIM Mail. Note: the message will not be delivered. domainlist local_domains = MAIN_LOCAL_DOMAINS. Exim supports two different kinds of filter file. conf, was pulled from Ubuntu® Server 10. Let’s get started. exim -bP. However, I am not sure why you are using fetchmail and exim4 to replicate functionality that is available in gmail. conf, your Exim installation is “live”. 1- Now to install exim4 packages, open terminal and type the following commands: sudo apt-get install exim4-daemon-light mailutils exim. Now install the EPEL repo and update the server. Manage Email Filters: This lets you to create rules to filter the email that arrives in the account. This will replace exim4-daemon-light, but exim4 requires exim4-daemon-heavy instead. This guide will take you through the steps to install and configure Exim on Fedora 38 - a robust platform for developers looking to set up their own mail server. The Qualified Advisors complete due diligence and credit analysis to facilitate EXIM supported financing of business aircraft and So, I've just set up mail and mutt and I'm happily sending emails to a gmail. Standardis recommended when Internet connections are slow, when using Exim is a free software distributed under the terms of the GNU General Public License, and it aims to be a general and flexible mailer with extensive facilities for checking incoming e-mail . I fixed it simply by disabling this option in WHM > Service Configuration > Exim > Basic > Security settings: Require clients to connect with SSL or issue the STARTTLS command before they are allowed to authenticate with the server. ) Oct 3, 2020 · From terminal: sudo apt install exim4. 2) Click Exim Configuration Editor. Mar 21, 2017 · 2. Smarthost. Set up a local exim SMTP server by following the instructions on this page, but choose the "mail sent by smarthost; no local mail" option from the first screen of the Exim configuration. Getting header info of the message: #exim -Mvh Msg_Id Dec 21, 2022 · It seems your Exim server is accepting email at port 587, but when it comes to delivering mail, it is not properly configured to establish a TLS/SSL connection to the destination server -- that's why it is connecting to the non-SSL port 25--. Oct 18, 2019 · We need to configure exim4 to relay the emails. It offers virtual hosting of mailboxes in maildir format with support for quotas and server-side filtering, domain aliasing, address aliasing, address forwarding In the same way as your SMTP settings, the tags are “markers” used by @Mail, so this can be easily configured via the WebAdmin – no manual configuration is necessary. Once you have completed and saved all changes to Exim's configuration files, you will need to restart it to activate those changes: 1. This driver manages the jailshells that the EXPERIMENTAL: Jail Apache Virtual Hosts using mod_ruid2 and cPanel® jailshell setting in WHM’s Tweak Settings interface ( WHM » Home » Server Configuration » Tweak Settings) uses. Next, scroll down the window, and click the Add additional configuration Sep 18, 2016 · If you are running exim as daemon (as it is in the default setup of the Debian packages) you should not invoke update-exim4. for example, to use the latter to forward to my backup account while keeping the original in my spool for POP3 access: # Exim filter <== do not edit or remove this line! unseen deliver [email protected] Exim 4. This chapter discusses some configuration settings that seem to be fairly common. " | mail -s Test example@gmail. It can be disabled by setting DISABLE_DKIM=yes in Local/Makefile. Jun 13, 2024 · This interface allows you to configure the POP3 and IMAP protocols that the Dovecot mail servers use. Use these settings to configure specific mail settings. It transfers emails from mail server to mail server until they reach their final destination. This Web Client works best with newer browsers and faster Internet connections. Your account name on your local Debian box: YOUR-USER-NAME. conf file and then run the template generation over it. By default all these message files are held in a single directory called input inside the general Exim spool directory. *:apikey:<YourAPIKey>. domain. May 18, 2022 · To change this setting for an existing account, perform the following steps: Log in to the desired cPanel account or use WHM’s List Accounts interface ( WHM » Home » Account Information » List Accounts) to access it. Installation. yourdomain. This document lists the interfaces in cPanel & WHM in which you can adjust OpenSSL's protocols and cipher stacks for those services. Exiqgrep is a grepping tool used for searching the patterns from the mail queue. 5) Display all Exim configuration settings: exim -bP Exiqgrep Commands. Exim, the only outgoing mail (SMTP) server available for cPanel/WHM, has a sizeable list of settings you can change to your liking. DKIM (DomainKeys Identified Mail) DKIM is a mechanism by which messages sent by some entity can be provably linked to a domain which that entity controls. You can do this easily under the Backup tap. The system creates the /etc/exim. instead of test with PHP function. This will set up an SMTP server on your box that can receive mail from the "mail" or "mailx" commands and will forward all messages to the smarthost (a Gmail 35. Sending mail to a smart host; 2. 1. You can set this up in the Forwarding and POP/IMAP settings of gmail. Jun 13, 2024 · This setting allows cPanel & WHM to determine the best value for your MySQL open_files_limit setting in the /etc/systemd/system/ MySQL file. Display Exim settings. Log line flags: <= Indicates the arrival of a message for incoming mail. conf. What is Exim? Exim is a mail transfer agent (MTA) used on Unix-like operating systems. There are several options to stop it doing this: Add required users to the trusted users list: trusted_users = user1:user2. The protocol list accepts Exim-specific settings. cp exim_monitor/EDITME Local/eximon. Configure everything according to your needs. com > [email protected] *@domain-c. IP address or host name of the outgoing smarthost > smtp. The JailManager driver updates each user’s jailshell with the root filesystem. My server hosts multiple domains. Basically we can do higher math 4. Exim is an open-source mail transfer agent (MTA). I activated this option and saved the port as 587, when I returned, this setting had returned to default. com smtp_port=587 sendmail_from = yourmail@gmail. Do this by setting your username to 'apikey' and your password to your API key's actual value (the string provided by Twilio SendGrid when you created the key). Oct 13, 2014 · The following article will guide you through the steps of installing and setting up a mailserver using Exim and Dovecot on a CentOS 7 VPS. To set up a server-wide smarthost, go to WHM's Home »Service Configuration »Exim Configuration Manager and search for the option, "Smarthost Support. This setting defaults to Off. The basic idea is to change the /etc/exim4/update-exim4. S. Navigate to cPanel’s Default Address interface ( cPanel » Home » Email » Default Address ). I hope it works for you as well! Jul 18, 2022 · I also added localhost:my-email:my-password to my /etc/exim4/passwd. Search the mail queue Feb 6, 2024 · 192. Feb 28, 2024 · sudo apt update. For each window, press Return to confirm and move on next page. But when I tried to send mail using echo "<Mail Body" | mail -s "<Subject>" [email protected] the mail is not sent. The POSTMAILCOUNT section must be used instead of ROUTERSTART for max hourly mail limits to be followed and used. If your system administrator has enabled one of the following settings in WHM’s Exim Configuration Manager interface ( WHM » Home » Service Configuration Jul 15, 2015 · Currently, I have exim set up to mark spam mail, and reject spam mail with high scores, using these ACL instructions in the acl_smtp_data ACL: warn condition = ${if Oct 2, 2023 · Exim, a widely used free mail transfer agent (MTA) software on Unix-like operating systems, currently boasts over 342,000 servers worldwide, according to the latest survey. Jun 20, 2024 · Setting Description; Free up Email Storage: This lets you view all of your mailboxes and remove old or large messages. Sep 3, 2020 · The cPanel SMTP set-up process involves two steps: Create an email account on the server. conf and sudo systemctl restart exim4 now runs successfully. Listing the messages in the mail queue: #exim -bp. com > [email protected] Apr 1, 2019 · Configuring the mail relay in WHM. Check it by sending a message from your favourite user agent. Exim 4. , mail client to mail server) while SMTP (Port 25) is the protocol, or set of rules for formatting data, that helps emails travel across the Internet. com::587. com address. sendmail_path = "/my_custom_path/exim -t". local file does not exist by default. To control outgoing mail from your server. com. Command line options. com sendmail_path = write_sendmail. If you want to verify for actual local subdomains, you and use a DNS Dec 31, 2023 · Exim is a highly configurable, open-source mail transfer agent (MTA) that's widely used for routing and delivering email on Unix-like systems. Exim is a message transfer agent (MTA). In WHM, navigate to the Advanced Editor of the Exim Configuration Manager. You can access these settings when you run the Dovecot mail server. You probably noticed that some of the options faded out as soon as the page loaded. The box will expand to show information about the spam scan process. Using the Sendmail design model, Exim has defined stages where it gains or loses Mar 27, 2023 · For ciphers, use the SSL/TLS Cipher Suite List text box. Jun 26, 2011 · I would get exim4 delivering email to the desired host, and then configure fetchmail to fetch your mail. When Exim delivers emails, they pass through a routine configured in the mailserver configuration file. e. 4) Display what Exim is doing right now: exiwhat. As an introduction to the way Exim is configured, this chapter “walks through” the default configuration, giving brief explanations of the settings. Log sender rates in the exim mainlog. Stay signed inForget Password? Version: DefaultAdvanced (Ajax)Standard (HTML)Mobile. mkdir Local. example. Exim’s status will be displayed as the transaction runs. May 28, 2020 · Russian military cyber actors, publicly known as Sandworm Team, have been exploiting a vulnerability in Exim mail transfer agent (MTA) software since at least last August. no_local_from_check. Let's assume: You are ok with Gmail rewriting your sender address or use this Gmail address. Makefile configuration changes. Mail Relaying – How it Works. forward files which begin with # Exim filter. DKIM is documented in RFC 6376. At last doing spam scanning at smtp time prohibit users specific setting (at least its not coherent as soon as you have multiples recipients for a mail). The primary configuration file is exim. Nov 11, 2013 · To install Exim and its dependencies, execute: sudo apt-get -y install exim4. forward files in their home directories. Client Types. • mail generates a new mail message • logwrite writes to a log file, defined by logfile • deliver, save, and pipe are significant by default Normal deliveries are bypassed if anything significant is done Can be made not significant by unseen • logwrite happens during filtering • The others are set up during filtering, but Nov 24, 2015 · On Debian and Ubuntu, Exim 4 is configured most easily using a template system. This guide will take you through your Mail Setup with step-by-step instructions. By default, it will take the hostname of the machine. The hostname must not match any domain that is being used on the system. forward with conditions”. Exim generally comes with default Debian installation. Mailman itself never delivers messages to the end user. This section defines how emails are Update mail function settings: Copy and paste the following configuration parameters into the mail function section. Improve this answer. gmail. Posted September 19, 2023. Jan 12, 2022 · To modify your Exim configuration files, you must possess root -level privileges. exe_path4. Getting summary of the mail queue: #exim -bp | exiqsumm. com or web1. Backup Exim Configuration. 1 Philosophy. This section describes configuring Exim to enable authentication with MailChannels. Sender Verification Callouts. This is a full exim 4 address list, and all available features can be used. This can be helpful for tracking problems and/or spammers. Exim supports a number of different ways of using the SMTP protocol, and its LMTP variant, which is an interactive protocol for transferring messages into a closed mail store application. 1. 1 mail. # Server side. Keep number of DNS-queries minimal > No. template <== ) 2- Install the exim4-daemon-heavy package. Step 3: Configuring SendMail. ini code to be edited: SMTP=smtp. May 24, 2016 · It depends on why the messages are being kept in the queue. sudo apt-get install SendMail. Here we are changing the user account that EXIM will run under. Dec 21, 2022 · Port 587,This is the default mail submission port, so it should only be used for submissions (i. exiqgrep -f [luser]@domain. System mail name: <your hostname>. May 29, 2010 · Exim is a message transfer agent (MTA) Some common configuration settings. Jun 20, 2024 · Setting Up Authentication. . /scripts/eximup --force. It is a service responsible for receiving, routing, and delivering e-mail messages. From terminal, type: sudo dpkg-reconfigure exim4-config. To configure Exim for your environment, execute: sudo dpkg-reconfigure exim4-config. If you are using Debian based configuration specify your domains as other domains in 'update-exim4. You can test to see if your server is open relay by sending an email via Telnet and getting a 550 error: . 3. Whenever your domain is cleared up and ready to be used, you will be able to add a few lines to your Exim Configurations that will forward all email you would Dec 15, 2022 · With these settings Exim will start delivery of first 30 emails (smtp_accept_queue_per_connection) and the rest will be put into local queue. In cPanel, navigate to the Email Accounts interface, which you will find in the main page menu’s Email section. Navigate to the Exim Configuration Manager and click on the Backup tab. The following configuration file, which can be found at /etc/exim4/update-exim4. This will start exim configuration wizard. We recommend using server. Create a new domain or select one you’ve created before. yum -y install epel-release yum -y update. The output should be like this –. In the WHM panel, go to Service Configuration >> Exim Configuration Manager. Allow untrusted users to set their own sender: untrusted_set_sender = *. 12 and 86. com'. Dec 30, 2023 · Exim is a message transfer agent (MTA) Some common configuration settings. Service manager settings save log; Unable to set exim altport to 587. Prerequisites. local file after you configure Exim’s settings to use non-default values. com instead. Disable the " Use the reverse DNS entry for the mail HELO/EHLO if available " option. I want to configure exim4 (on ubuntu 10. Hooking up your mail server. Jun 13, 2024 · Mail. This setting allows Exim to connect to the mail exchanger for Nov 13, 2013 · Here is how to do it if you’re using DigitalOcean’s DNS: Go to the “DNS” area in your DigitalOcean panel. This is a pretty straight forward setup but I'm struggling to get it working. Once you have set up the symbolic link, or edited /etc/mail/mailer. Exim is designed to work efficiently on systems that are permanently connected to the Internet and are handling a general mix of mail. Make configurations changes to Local/Makefile with your favorite editor (vi is always there). Exim is a widely used MTA software for Unix-based systems and comes pre-installed in some Linux distributions as well. If you ever need to modify any of your settings, simply re-run the configuration wizard. In addition to the features already supported by exim4-daemon-light, for advanced features such as LDAP, sqlite, PostgreSQL and MySQL data lookups, SASL and SPA SMTP authentication, embedded Perl interpreter, and the content scanning extension (formerly known as "exiscan Jun 13, 2024 · The /etc/exim. Search the mail queue for messages from a specific sender. Comment out or disable all other settings related to mail. Example: *@domain-a. Consequently, Exim does not maintain independent queues of messages for specific domains or hosts, though it does try to send 3. route_list = * outbound-stmp. You must Dec 9, 2015 · Visible domain name for local users > domain. 0. transport = remote_smtp. This will be the server that is routing all email for the domains sending outbound email. So deferring spam scanning on mailstore allows to store spam in a junk folder based on scanning that really suits each users because it's done at delivery time. 70, DKIM support is compiled into Exim by default. cd ~/exim/src. conf file will only work temporarily. For incoming mail, the following are available: Exim Overview. A server running Fedora 38 Feb 15, 2016 · Here are some Shell commands for mail queue: Reprocessing the mails residing in the mail queue: #exim -qf. Depending on how your Debian system was set up, an email server like exim, Postfix or Qmail may already be installed on your host. Try: /scripts/upcp --force. You should now be able to ping your hostname and get a response from your server. conf' like this: dc_other_hostnames='example. Mailman needs to communicate with your MTA ( mail transport agent or mail server, the software which handles sending mail across the Internet), both to accept incoming mail and to deliver outgoing mail. -> Additional address for the same Chapter 58 - DKIM, SPF and DMARC. It sends them to its immediate upstream MTA, which Exim4 also supports old-style . I currently have all emails from Exim being forwarded to an outbound STMP server on our network. From the Send all unrouted Here is a guide for setting up exim4 email server in send-only mode on Debian 10 Linux. You must use the Advanced Editor feature to make permanent changes to your /etc/exim Setting Up A Mail Server Using Exim4, Clamav, Dovecot, SpamAssassin And Many More On Debian This howto describes one way to build a scalable, secure, full-featured mail platform. Created in 1995 by Philip Hazel, an estimated 57% of publicly reachable mail servers on the internet use Exim. If none of the options that specifies a specific action (such as starting the daemon or a queue runner, or testing an address, or receiving a message in a specific format, or listing the queue) are present, and there is at least one argument on the command line, -bm (accept a local message on the Hello Setting changes in "Exim Mail Server (on another port)" option in "service manager" section does not work in 86. Click the “Add record” button in the top right. Here is a section of my Exim config that is sending mail out: send_to_gateway: driver = manualroute. Enter the account’s server and authentication information in the email client. ∆ These instructions will guide you through configuring Exim to use SMTP. Click Save. Assuming your hostname is resolving to your server next we need to get a certificate for your hostname. 1) Its configuration page can be found under Service Configuration. Procedure. Jun 16, 2021 · Test Exim SMTP transaction. com as example. cp src/EDITME Local/Makefile. Feb 4, 2023 · It is possible that the server has the "reject_unknown_recipient_domain" option set in its Exim configuration file. com > [email protected] *@domain-b. x - Mail Setup. I am using EXIM as my MTA. This is found in /etc/exim4. Jun 29, 2023 · Below are the steps to change Message Size Limit from the WHM panel: Log in to WHM with the root account and password. " Enter an asterisk ( *) and a space, followed by the value of the smarthost. It happens that there will be a change in my infrastructure and this script will no longer be able to stay on the same Oct 20, 2018 · This will set the local_domains used to accept email. Exim has been ported to most Unix-like systems, as well as to Microsoft Windows using the Cygwin emulation layer. – Aug 2, 2022 · I have an Exim mail server, it is configured so that each incoming email has its content handled by a PHP file. conf directly when exim is running. # dpkg-reconfigure exim4-config. template ( ==> before: make a copy of your current /etc/exim4/exim4. Using Exim to handle mailing lists; 3. Any edits that you make directly to the /etc/exim. To configure Exim mail server in WebHost Manager. We don’t want to encourage bad mail server setup that will make the SPAM problem on the Internet even worse. User filters. Enable the " Reference /etc/mailhelo for custom outgoing SMTP HELO " option. Exim is a message transfer agent (MTA) Some common configuration settings. Exim's configuration files are typically located in the /etc/exim directory. 168. A check of /var/log/exim_mainlog is recommended. For SMTP receiving or queue running, exim forks, and the new processes would use the new configuration file, while the original main exim daemon would still use the old configuration file. First run sudo dpkg-reconfigure exim4-config and use these config options: General type of mail configuration: mail sent by smarthost; received via SMTP or fetchmail. You should consider what to tell your users about the change of MTA. IP-address to listen on for incoming SMTP connections: 127. to sv mh yu zj ym kl va om ej