where REMOTEHOST is a hostname or ip-address. com mail is handled by 50 remote. 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. Postfix, despite its security-orientation, provides a high level of flexibility and ease of administration. If not otherwise specified, the default action is to accept. Here, you can give a semicolon-separated list of IP address for multiple IP’s. Select Domains and IPs tab. <CR><LF> but some other popular e-mail Navigate to Exim Configuration Manager. 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. exim -bP. ∆ These instructions will guide you through configuring Exim to use SMTP. Resolution: Follow the steps below to install and configure exim as a SMTP mail server: Install the exim mail server software: Raw. However, the order can be changed by setting the hosts_randomize option, either on the router (see section 20. com as an authenticated remote SMTP transport for all your non The port numbers specified by this option apply to all SMTP connections, both via the daemon and via inetd. Navigate to " Home > Service Configuration > Exim Configuration Manager . Your mailserver might be configured to use a smarthost. exim -bh ipaddress This spoofs an SMTP transaction emanating from ipaddress. The two indicators here that this issue is present are the ESMTP Exim line being that of SMTP. In /etc/default/exim (In cPanel create or update /etc/sysconfig/exim) change the option to the If the address_test option is set false, the router is skipped when Exim is run with the -bt option to test an address routing. Because routing was done, Exim knows which messages are waiting for which hosts, and so a number of messages for the same host will get sent in a single SMTP connection. Exim fails to send an email, and an entry similar to the following can be found in the Exim log. tld. ROUTERS CONFIGURATION. Procedure. These lists are also used as data in ACL statements (see chapter 44 ), and as Follow. If you're using the split Debian configuration, you can create a new file in. There is also support for a third kind of SMTP when a message is passed from a local process to Exim by running the SMTP protocol over the standard input and output. If you would like to route your emails through Mailjet using Thunderbird, you will need to add our SMTP relay to the list of outgoing servers: 1. Besides, it implements the Sendmail CLI and is compatible with Sendmail mail filters. Login to WHM. The host relay-test. report after verifying each recipient address. " On this page, search for "Section: AUTH". Exim can be installed in place of Sendmail, although the configuration of Exim is quite different. domains = *. Chapter 15 - Generic options for routers. COM = The SMTP host on the machine where my Shared Hosting is A0309: As your first router, have the standard dnslookup router from the default configuration, with the added option. The changes will be added to the Exim configuration and automatically restart the Exim service. Updated September 16 2012 at 2:04 AM -. 40. The name of the file is compiled into the binary for security reasons, and is specified by the CONFIGURE_FILE compilation option. Scroll to the bottom of the page and click the blue save button. 1. SMTP extensions; 19. Non-SMTP incoming messages; 17. public. Chapter 53 - Log files. Select the Edit button next to Trusted SMTP IP addresses. Provide the IP address from which you want to receive the request and send emails. By default, it is enabled. template. 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. There is a great deal of flexibility in the way mail can be routed, and there are extensive facilities for checking incoming mail. Enable SMTP/S scanning in the firewall policy to intercept the SMTP/S transparently. Also, some operating systems are able to disable IP source routing at the kernel level. 1 (build 9), some domains in /etc/staticroutes, whose mail need to be forwarded to remote smtp. 97. Exim normally keeps these files open during routing, because often the same file is required several times. Outgoing SMTP over TCP/IP is implemented by the smtp transport. Add the following configurations: allow_utf8_domains = true. Those that are preconditions are marked with ‡ in the “use” field. User filters. forward files in their home directories. System mail name: <your hostname>. If the address_test option is set false, the router is skipped when Exim is run with the -bt option to test an address routing. Processing messages; 20. transport = remote_smtp. For more detailed step on how you will be able to configure custom EXIM IP, please review the following documentation: How to Configure the EXIM out-going IP address. smtputf8_advertise_hosts = *. In SSH, edit the /etc/mailips file and add the following line, replacing 203. section. 4. Click the Reset tab. begin routers section and add or modify it as follows: smarthost: driver = manualroute. Step 4: Control and Test Exim. Apr 5, 2016 · Exim will use TLS for outgoing connections if it is available and you haven't disabled it. IP source routing is an obvious security risk, and many sites lock out such packets in their routers. This guide will take you through your Mail Setup with step-by-step instructions. Turn option to "ON" for Send mail from the account's IP address. DKIM is documented in RFC 6376. From there you have the option to enable the default RBLs as well as add a custom RBL. If the setup is correct, you should receive the test email. Exim writes four different log files called `mainlog', `rejectlog', `paniclog' , and `processlog' into a sub-directory of its spool directory called `log' , unless a compile-time option called LOG_FILE_PATH or a runtime option called `log_file_path' is defined to specify a different directory and template for the file names. 48. 33 with the IP address from which outbound messages should be sent. This chapter contains details of how SMTP is processed. Jul 17, 2019 · defer (-53): retry time not reached for any host. The contents of the data string, whether obtained from data or file, can be interpreted in two different ways: . Without route_list = !+local_domains smarthost. Exim writes three different logs, referred to as the main log, the reject log, and the panic log: The main log records the arrival of each message and each delivery in a single line in each case. 0/0. net. Print what Exim is doing right now: root@localhost# exiwhat. Oct 18, 2019 · Select “internet site; mail is sent and received directly using SMTP” option. This is an extension to the SMTP protocol, described in RFC 2554, which allows a client SMTP host to authenticate itself to a server. Enter the account’s server and authentication information in the email client. For this tutorial, we are using one of our CentOS-based managed VPS hosting plans, pre-installed with minimal CentOS 7 OS. System filter; 21. In the text box, input the following: mailgun_login: driver = plaintext. Two-character flag sequences make it easy to pick out Procedure. Go to the ‘Tools’ menu then select ‘Accounts…’. Finally. You can configure hosts that you want to avoid TLS with. 2. You must The SMTP command EXPN is is permitted only if the calling host matches `smtp_expn_hosts' (add `localhost' if you want calls to 127. conf' should be like this: smtp stream tcp nowait exim /opt/exim/bin/exim in. What is Exim? Exim is a mail transfer agent (MTA) used on Unix-like operating systems. " Enter an asterisk ( *) and a space, followed by the value of the smarthost. 1 above), or on the transport. Mail to that domain was handled by the localhost and there was a system alias set up to send all mail To configure MailGun on your server: Sign up for MailGun, if you still need to do so. Note: the message will not be delivered. If it's under "electric. Exim uses a single run time configuration file which is read whenever an Exim binary is executed. In this example, you will send a simple plain text email to 1 recipient. Next, specify that you are attempting to authenticate: Log files. net", there's your answer. The smtp transport delivers messages over TCP/IP connections using the SMTP or LMTP protocol. Find the blue button that says "Add Additional Configuration Setting" and click on it. From the command line enter “exim -bt” followed by the email address to test as shown in the example below, where I was testing the email address minerva@nz1. When an address is routed to an smtp transport by manualroute, each of the hosts is tried, in the order specified, when carrying out the SMTP delivery. May 29, 2016 · 2. The latter specifies the order in which the preconditions are tested. May 10, 2024 · I've edited the EXIM advanced configuration to use a dedicated SMTP2GO server for outgoing SMTP to improve email deliverability according to this guide. private. 36. In the latter case, the entry in `/etc/inetd. In a conventional Exim configuration, users are able to run private filters by setting up appropriate . Next, we need to EHLO into the mail server: EHLO yourdomain. It is still working great on several servers, but for a new server I'm configuring now I can't send mail after saving the EXIM configuration. In exim configuration domainlist local_domains is used to store list of email domains that should be delivered to local (this hosts) mailboxes. This facility is an extension to the SMTP protocol, described in RFC 2554, which allows a client SMTP host to authenticate itself to a server. Check out following sites for more more information: Exim email routing slide. This can be helpful when the first router sends all new messages to a scanner of some sort; it makes it possible to use -bt to test subsequent delivery routing without having to simulate the effect of the scanner. These instructions will guide you through the configuration of a server to support remote spam filtering for selective clients. 3) Exim queue configuration. " Select the " Apache SpamAssassin™ Options " tab. Restart exim to take effect. Add your router to your configuration file within the. Receiving mail. SMTP authentication. In WHM, navigate to the Advanced Editor of the Exim Configuration Manager. d/routers. If you are still struggling to get your setup working, please contact The SMTP Support Team for help. In cPanel, navigate to the Email Accounts interface, which you will find in the main page menu’s Email section. IP-address to listen on for incoming SMTP connections: 127. English. YOURHOST. route_list = * REMOTEHOST. for testing address rewriting and routing configurations. T=remote_smtp defer (-53): retry time not reached for any host Description . Step2 – Configure the Exim remote-smtp transport to sign outgoing Nov 15, 2021 · Navigate to: Home »Service Configuration »Exim Configuration Manager. If Exim receives an SMTP call with IP options set, it logs the options if log_ip_options is set. The POSTMAILCOUNT section must be used instead of ROUTERSTART for max hourly mail limits to be followed and used. Incoming SMTP messages over TCP/IP. /usr/sbin/sendmail -bv address. The port numbers specified by this option apply to all SMTP connections, both via the daemon and via inetd. server. First, let’s create a new email account. For incoming mail, the following are available: SMTP over TCP/IP (Exim daemon or inetd ); 1. A single-level expansion of the address is done. 3. Jun 7, 2022 · Here are the steps. Log in to WHM, and navigate to " WHM / Service Configuration / Exim Configuration Manager / Advanced Editor. Jun 8, 2006 · Open exim configuration file i. The Exim configuration file. Apr 20, 2017 · 1. This includes negative items, and so it is possible to exclude addresses from being blacklisted. Also, check your own hostnames to see if your ISP is I try to make exim send mails for root to [email protected] rather than [email protected]. This occurs because Exim supports <LF>. This kind of domain can be handled in Exim with a straightforward aliasing router. Turn on MTA mode via Email > General settings > SMTP deployment mode. 16) can be used to display the date, and optionally the process id, of an Exim Message ID. These instructions assume root access to the server, and the use of Exim mail handler. d/exim4 restart. Additional Documentation. A range of IP addresses — Example 35. 1 to be able to use it). Here is an example: * dedrelay. Jun 5, 2016 · Verify the permissions on your private key. This will handle all domains whose lowest numbered MX records do not point to your host. The list of hosts to try can either be taken from the address that is being processed (having been set up by the router), or specified explicitly for the transport. Here is an excerpt of the SMTP Debug from the WP SMTP Mail plug-in in Wordpress. Jun 20, 2024 · 35 5 * * * root /usr/sbin/exim_tidydb -t 1d /var/spool/exim wait-remote_smtp. For each of the referenced sections, enter the information below that section into the corresponding boxes in the configuration editor. Click on the Advanced Editor tab. Relay SMTP messages to Office 365 / Smart Host. com. `Mainlog' records the arrival of each message and each delivery in a single logical line in each case. minervamail. If your transport is to dkim_strict, it will requeue messages if it cannot sign the message. If it's an ip-address, do a reverse lookup on it. I tried also changing /etc/aliases with root: [email protected] . By this means a server might, for example, recognize Navigate to "Home / Service Configuration / Exim Configuration Manager. Unqualified addresses are accepted only from specified hosts or networks. Access into Service Configuration. Then you just need a fall-through router below pointing at the smarthost transport. Generic options for routers; 16. The “authenticators” section of Exim’s runtime configuration is concerned with SMTP authentication. You will also set exim to show sending logs. Exim writes three different logs, referred to as `mainlog', `rejectlog', and `paniclog' . Jun 20, 2024 · This article provides instructions for setting up authentication. It must be readable by the use Exim runs as which Debian-exim for Debian and Ubuntu installations. The only way Exim can receive mail from another host is using SMTP over TCP/IP, in which case the sender and recipient addresses are transferred using SMTP commands. If this does not provide enough detail, you may add the -d flag to the command to provide a great deal Jan 18, 2024 · For more advanced configurations, edit the Exim configuration file directly: sudo nano /etc/exim4/exim4. sudo /etc/init. Now, the configuration: static_route: driv . When too many outbound emails to a domain fail, Exim will defer delivery and attempt to send the emails again later. Here you can set up routing, transports, and authenticators for different requirements. The seventh part of Exim's run time configuration, following the rewriting configuration, is concerned with SMTP authentication. To start, stop, or restart Exim, use: Hi, we have the same problem to all mails crossing a vpn. Make sure the following option is enabled: Reference /etc/mailips for outgoing SMTP connections. key -out dkim. Enter the IP address or IP-address range to whitelist in either of these formats: A single IP address — Example: 192. We fight with this every time, so this is as much being shared as is place for us to reference this in the future. " Click on the "RBLs" tab. Log into WHM as the 'root' user. Note that if you are using the ndbm library, it actually opens two files for each logical DBM database, though it still counts as one for the purposes of lookup_open_max . Two-character flag sequences make it The easiest way to do this might be to put an ignore_target_hosts directive on the SMTP router, so that Exim passes over that router if it finds an IPv4 address in the MX record of the destination. smtp. You can configure your Postfix to send via in. From: sender@example. com: exim -bt minerva@nz1. Alphabetical list of main options; 15. 5 or 2001:0db8::0000:0000:0000:0000:0000. One approach is to create a separate alias file for each virtual domain. Try sending a test email using one of the Webmail applications. You don't need to configure certificates for outgoing connections. If the limit is reached, Exim closes the least recently used file. /etc/exim4/conf. By default, it will take the hostname of the machine. This command should be issued on your mail server: domain. I can assure you that I have investigated this topic for hours before posting here. Remote attackers can use a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass of an SPF protection mechanism. This is useful. Find the option labeled "Smarthost support". Where yourdomain. 10 and 3. Substituting yourserver. Test how exim will route a given address: root@localhost# exim -bt alias@localdomain. Incoming SMTP messages; 18. Additionally, you can check the Exim logs for any errors or confirm successful delivery: What I did to have a clean test was to backup my exim config, reset it to defaults and only change AUTH, ROUTERSTART and TRANSPORTSTART sections, with standard conf: smtp_login: driver = plaintext public_name = LOGIN client_send = : USERNAME : PASSWORD send_via_smtp: driver = manualroute domains = ! +local_domains transport = smtp_smtp route Aug 8, 2007 · > * the message arrived using non-SMTP (I'm hoping this will > indicate a failure > message that Exim is generating and wanting to return!) -- in > which case > I want to route it to the mail hubs, or > > * the message arrived over SMTP (ie, from the mail hubs) -- in > which case > it needs to be delivered. (NOTE: If you are using a system with a NAT network To do this — use the host command or more advanced dig, whatever you like best. Exim contains header and envelope rewriting facilities. Select ‘Outgoing Server (SMTP)’ for your email address, then click the ‘Add’ button to create a new SMTP entry. If you don't know your mail server's address, start with a MX Lookup. somewhere. Display Exim settings. From terminal (press ENTER key after each row): pi@raspberrypi:~ $ exim -v recipientTo@example. So here is so far what I have found: Set up connectors to route mail between Office 365 and your own email servers The office365 to our VPS connector is setup properly and we get emails to our VPS (on our WHM/cPanel). For a general description of how a router operates, see sections 3. The accept router Exim 4. al SMTP tcp communication is dropped without any reason This test will connect to a mail server via SMTP, perform a simple Open Relay Test and verify the server has a reverse DNS (PTR) record. Print a summary of messages in the queue (count, volume, oldest, newest, domain, and totals): root@localhost# exim -bp | exiqsumm. Indeed running exim -v from the command line to send an email it is passed off to the smart relay immediately. If you need more advanced features like LDAP, sqlite, PostgreSQL and MySQL data lookups, SASL and SPA SMTP authentication, embedded Perl interpreter, and exiscan-acl for integration of virus-scanners and SpamAssassin, you can replace exim4 What I did to have a clean test was to backup my exim config, reset it to defaults and only change AUTH, ROUTERSTART and TRANSPORTSTART sections, with standard conf: smtp_login: driver = plaintext public_name = LOGIN client_send = : USERNAME : PASSWORD send_via_smtp: driver = manualroute domains = ! +local_domains transport = smtp_smtp route However, if any SMTP deliveries are required, they are not done at this time. The ACL test specified by acl_smtp_dkim happens after a message has been received, and is executed for each DKIM signature found in a message. to test for effect with the application of your choice. Click the drop-down menu next to the Reset type option and choose the reset option you want to use. Enter an astrisk character, followed by the relay server that GoDaddy provided to you. Reading and Understanding Eximlogs Sep 15, 2021 · Any routers above yours in the file could match incoming emails first. 1 are now obsolete. Login to your cPanel server via SSH or Terminal as the root user. i. 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. For beginner admins, Postfix would be easier to set up than any other MTA. Provide the server name for the Exim4 SMTP server. Go to Home » Service Configuration » Exim Configuration Manager in WHM. Jun 16, 2021 · Display Exim’s current activity. 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. tld is the domain you wish to test against. Click the Reset button. Oct 3, 2020 · Exim example 1 – Plain Text With Verbose Output. user@thishost. Routing and delivery; 22. Jan 26, 2024 · You can send a test email using the following command: echo "Test email from Exim" | mail -s "Exim Test" [email protected] Check the email account to which you sent the test message. Select Exim Configuration Manager. The acl_smtp_dkim ACL is available only when Exim is compiled with DKIM support enabled (which is the default). tld 25. This is called `local SMTP', and is an input process only. If the allow_filter option is set true, and the data begins with the text “#Exim filter” or “#Sieve filter”, it is interpreted as a list of filtering instructions in the form of an Exim or Sieve filter file, respectively. 0. com even messages to root@localhost would be relayed to smarthost. Incoming SMTP messages can be accepted in one of two ways: by running a listening daemon, or by using `inetd'. 113. Try this command. This will be the server that is routing all email for the domains sending outbound email. Scroll to the bottom of the page and click the blue Save button. Exim’s status will be displayed as the transaction runs. Bounce and warning messages; 23. Look for this in exim. -bv Do not collect or deliver a message. Exim can test for the existence of the alias file to determine whether the domain exists. Exim Configuration Manager Basic Editor: RBLs exim -bt command line flag. COM and the Peer certificate being passed back of SMTP. For example, the hold_domains option contains a list of domains whose delivery is currently suspended. All versions of Exim previous to version 4. Exim can perform multiple deliveries down the same SMTP channel after deliveries to a host have been delayed. exim -bs. 1. Check the auto-added firewall policy added for MTA and edit the policy to select the WAN interface on which the MX record gets published. Test Exim SMTP transaction. mail-abuse. com relay, depending on the sender, by following these steps: In this example, all outgoing emails are sent directly to Mail eXchangers (MX), except for when from is *@example. com”. Next, access your server using telnet over port 25 (SMTP) telnet yourserver. key -pubout -outform PEM. Something like: ignore_target_hosts = 0. secureserver. Click the Mail tab. Interpreting redirection data. com or example@example. Navigate to: WHM >> Exim Configuration Manager >> Basic Editor. Testing ACLs. Because of the no_more setting, if it encounters an unknown domain, routing will fail. Such messages remain on the queue until a subsequent queue-running process encounters them. Type “ exim ” in the search box, without the quotation marks. 12. Click the The exim_msgdate utility (see section 54. Enable one of the following options: " Scan outgoing messages for spam and reject based on the Apache SpamAssassin™ internal spam_score setting ". Release found: Red Hat Enterprise Linux 4. You still need to specify all the ports that the daemon uses (by setting daemon_smtp_ports or local_interfaces or the -oX command line option) because tls_on_connect_ports does not add an extra port – rather, it specifies different behaviour on a port that is defined elsewhere. tld with the primary IP or the hostname of your server. conf. Execute the following command with with the email address that would be sending a message to the cPanel server that you are logged into: exim -bvs sender@remotedomain. 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. It is configured to use a highly available smart host - so this is not an issue with the remote MTA. 2. Exim has flexible retry algorithms, applicable to mail routing as well as to delivery. 1 allows SMTP smuggling in certain PIPELINING/CHUNKING configurations. A number of Exim configuration options contain lists of domains, hosts, email addresses, or local parts. Log files. key 1024. It permits reputation to be tracked on a per-domain basis, rather than merely upon source IP address. It will also measure the response times for the mail server. The -bh command line option provides a way of testing your ACL configuration locally by running a fake SMTP session with which you interact. You'll get an exim daemon with minimal feature set (no external lookups). Change how many queue runners that are spawned off. Click the Exim Configuration Manager link under Service Configuration. EXPN is treated as an `address test' (similar to the `-bt' option) rather than a verification (the `-bv' option). It will log the failure causes to the mainlog and the paniclog. Instead, send an email. exiwhat . Then extract the public key from the private key: #openssl rsa -in dkim. Just apting the metapackage exim4 will pull in the other packages per dependency. 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. Share. Test the Configuration . Where in my case: SMTP. I'm building a set of internal Exim SMTP relays for mail routing, wondering if there's a way to look up valid email addresses in active directory/LDAP to determine deliverability My corporate overlords have decided running Exchange on-site is no longer economical/practical, and shifting our organization's corporate mail to 365. COM. I tried adding a . > Step1 – Generate a private and public key to sign your messages; you can do this easily with openssl: #openssl genrsa -out dkim. mailjet. conf: transport = remote_smtp. #up2date exim. forward in /root with [email protected] as content. Jan 4, 2024 · Description. If you are using cPanel with Exim and want to relay your email through MailChannels, navigate to Main > Service Configuration > Exim Configuration Editor, click on the Advanced Editor button, and enter the following in Section:AUTH: Next, replace MailChannelsUsername and 3. This works on port 25 as well as 587. route_data = “mta3. e. Chapter 10 - Domain, host, address, and local part lists. org provides a service for checking your relaying configuration (see section 39. instead. SMTP Relay Postfix Installation. there is no issue with the routing, authentication, availability. The mail queue can be listed using 'exim -bp | exiqsumm' Also from the command line you can "exim -v -M messageid" to try re-sending a test email again if your first email attempt does not go so well. x - Mail Setup. This is a common way for a server to recognize clients that are permitted to use it as a relay. TLS on incoming traffic requires a certificate and some setup. Sep 3, 2016 · Re: [exim] Smart Host Routing Català Dansk Deutsch Ελληνικά English Español suomi Français Galego magyar Italiano 日本語 Nederlands Polski Português Português Brasileiro Este mensaje es parte del siguiente hilo: Oct 28, 2019 · At the same time, Exim is the most configurable. x release was 3. The first usage is probably more common, and does seem more “virtual” than the second. Oct 27, 2023 · To: Jasen Betts CC: exim-users Betreff: [exim] Re: Routing based on *recipient* IP address Dec 30, 2023 · All incoming messages (SMTP and non-SMTP) 16. example. 40 for more details). sendmail binary from postfix has special options -bv. If the email does not leave the server, you must examine the /var/log/exim_mainlog file to determine the cause of the issue. public_name = LOGIN. It is recommended to run the cron job when the volume of mail flow is expected to the low. Some sites may wish to use the same Exim binary on different machines that share a file When Exim is looking for a retry rule after a routing attempt has failed (for example, after a DNS timeout), each line in the retry configuration is tested against the complete address only if retry_use_local_part is set for the router. 1 Outgoing SMTP over TCP/IP. The last 3. This chapter describes the generic options that apply to all routers. Otherwise, only the domain is used, except when matching against a regular expression, when the local part of This is a full exim 4 address list, and all available features can be used. Chapter 58 - DKIM, SPF and DMARC. Search the mail queue for messages from a specific sender Sep 3, 2020 · The cPanel SMTP set-up process involves two steps: Create an email account on the server. self = pass. To set up a server-wide smarthost, go to WHM's Home »Service Configuration »Exim Configuration Manager and search for the option, "Smarthost Support. hi, guys! i got this simple scenario: cpanel WHM 11. net which are going through Mailjet. 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. The format is as compact as possible, in an attempt to keep down the size of log files. Exim before 4. 5. First of all make sure that remote smtp server is accepting connections on 25/tcp and is operating without any unpredictable errors. ra wt ok cq im mv eh pu qe me