How to Install and Configure a Postfix Mail Server with Dovecot on Linux Ubuntu
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- Опубликовано: 14 июл 2024
- ⭐⭐⭐⭐⭐ Watch this video to find out how to install and configure a Postfix mail server with Dovecot. How to configure the mail server to prevent your emails from falling into the spam folder, how to add DNS entries such as SPF, DKIM and DMARC.
Creating a mail server on Linux-based machines could be one of the most important things that every system administrator should do. If this is the first time you configure your server, you are going to face a lot of aspects that have to be considered during setup. In today’s video, I’ll take you through the initial server configuration. We’ll discover how to install a Postfix mail agent and a Dovecot mail server, and how to configure them for your emails to circulate properly.
Postfix is a free and open-source MTA - mail transfer agent - that can be used to route and deliver electronic mail on a Linux system.
Dovecot is a mail delivery agent created primarily with security in mind. I’ll show you how to configure it as an IMAP or POP3 server.
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📚 Content:
00:00 - Intro
01:41 - What you need for installation
03:04 - Set the host name and create DNS entries for the domain
03:54 - Installing a Postfix mail server on Ubuntu
05:20 - Testing a Postfix mail server on Ubuntu
07:38 - Installing Dovecot IMAP and POP on Ubuntu
09:59 - How to add a DKIM entry
Playlist: 🐧 How to Install, Configure and Use a Linux Subsystem 🐧 - • 🐧 How to Install, Conf...
Other videos: #Posftfix, #Dovecot, #Ubuntu 
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you are such a lifesaver, i learned how email works in my college course so i decided to host my own, but most of tutorials and documentations are tedious and i don't know where to start, thanks for your awesome video
Finally a tutorial that actually works, after 13 tries...
Thank you!
Glad you found our video useful)
it does not work for me. After installing mailutils and trying to send a mail to my gmail account it just does not send it. Nothing ever gets to my gmail.
@@isithardtobevegan53 DKIM is not setup properly. Gmail makes sure that DKIM is setup
@@isithardtobevegan53 any solution ?
@@isithardtobevegan53 hi, I face the same problem, have you successfully solved it?
Thank you for the good tutorial for getting a "bare" command-based Postfix and Dovecot.
We are glad we were able to help you )
This is a topnotch, echelon tutorial. thank you so much for the excellent work.
Glad our video was useful to you)
I thank you for this very good tutorial that you put on the internet and solved my problem ❤❤❤❤❤❤
Very nice and comprehensive tutorial 👌
Always happy to help )
Very well done Video, very helpful thank you
please, glad to help
When I added the txt dkim record on my DNS provider and checked it with an online dkim checker tool, it wasn't valid.
If you have this problem too, when running the "opendkim-genkey" command, add -b 2048 to set a correct length
Edit: I realised that dkim wasn't actually working at the end of the video because gmail adds a "signed by" section in the little sender drop down box if it's working. STILL A GREAT VIDEO THOUGH! Thanks a lot for making it :D
For example, the command should look like this:
opendkim-genkey -b 2048 -r -s mail -d example.com
This will generate a correct dkim key of 2048 bits instead of the standard 1024 bits. This will help avoid problems with invalid dkim records. Make sure you update your DNS records afterwards and check them with online dkim verification tools.
@@HetmanRecovery Actually, I think opendkim-genkey makes a weird size by default. I believe 1024, 2048 and maybe even 4096 would've been accepted by my DNS provider. I edited my comment to say thanks, but in case you don't see it ... Thanks for making this video!
jelas sekali aku suka video nya
While I haven't followed it yet it seems a very clear video. I was curious to find more content Linux servers related but none :-) definitely continue with roundcube squirrelmail horde spam assassin and more! Slava Ukraini
Thank you) Geroyam Slava!
Thanks!!
Glad our video was useful to you)
Hey, I didn't actually get the part when he added MX and A records. Could someone explain it to me please ?
I follow this video, and succeed to send email and receive email in the server. But when I set a pop client in thunderbird from another computer, it failed. what is the pop setting should be?
I get "Package postfix is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source" when trying to install
thanks, this worked fine. But the next part to connect from a client is where it took hours
We are glad that our video was useful for you!
Really helpful tutorial! Now I'm trying to configure Thunderbird to read mail from my server: the account has been created but it doesn't download any mail from IMAP or POP3. Do you have any tutorial about this?
Sending from terminal works as a charm and emails correctly arrive in /Maildir/new
I'm glad you found the previous tutorial helpful! Configuring Thunderbird to read mail from your server involves setting up the correct IMAP or POP3 settings. While I don't have a specific tutorial available, I can provide you with general steps to configure Thunderbird for your email account:
Open Thunderbird: Launch the Thunderbird application on your computer.
Set up a new account: If you haven't created an account yet, go to "File" > "New" > "Existing Mail Account" to start the setup wizard. If you already have an account, you can go to "Tools" > "Account Settings" and click on the "+" button at the bottom left to add a new account.
Enter your account details: In the setup wizard, enter your name, email address, and password. Click on "Continue" to proceed.
Select the account type: Thunderbird will attempt to auto-detect the server settings based on your email address. If it fails to do so, you can manually select the account type (IMAP or POP3) from the drop-down menu.
Configure the server settings: Enter the server hostname, port number, and SSL/TLS settings as per your email provider's instructions. Typically, the IMAP server uses port 993 with SSL/TLS, while the POP3 server uses port 995 with SSL/TLS.
Set up authentication: Choose the authentication method, such as password, OAuth2, or another method, and provide the necessary credentials.
Test the settings: Click on the "Test" button to verify that Thunderbird can connect to the server and retrieve the necessary information. Resolve any errors or warnings that appear during the test.
Complete the setup: Once Thunderbird successfully connects to the server, click on "Done" to finish the setup process.
Access your email: The account you just configured should now appear in the Thunderbird sidebar. You can click on it to access your emails, folders, and other mailbox features.
If Thunderbird still doesn't download any mail, double-check the server settings, including the hostname, port numbers, and authentication details. Ensure that you have a stable internet connection and that your email provider's server is accessible. If you continue to experience issues, it may be helpful to consult the Thunderbird documentation or seek assistance from their support forums or community.
Remember to keep your email client and server software up to date, as outdated versions can sometimes cause compatibility or connectivity issues.
I could get the e-mail working, but couldn't send from the created user "demo" as shown. Where did I miss? Seems to me that at 4:41 (dpkg-reconfigure postfix) it is needed to inform the user at pink screen (recipient) but I could not solve this.
It seems like you're encountering an issue with sending emails from a user named "demo" and configuring Postfix. To help you troubleshoot the problem, I'll need more information about your setup and the specific error messages you're encountering. However, I can provide some general guidance on setting up Postfix and sending emails from a specific user.
Check Postfix Configuration: First, ensure that your Postfix configuration is set up correctly. You can use the dpkg-reconfigure postfix command to reconfigure Postfix and walk through the setup process. Make sure to select "Internet Site" when prompted for the mail server configuration.
Verify User "demo": Confirm that the user "demo" exists on your system. You can use the id demo command to check if the user is present.
User Permissions: Ensure that the user "demo" has permission to send emails. You may need to check the user's group memberships and ensure they have the necessary permissions to access the Postfix mail queue and send emails.
SMTP Authentication: If you are trying to send emails using a remote SMTP server (e.g., Gmail), you will likely need to configure SMTP authentication. Make sure you have the correct SMTP server settings and credentials for the "demo" user in your email client.
Check Postfix Logs: Check the Postfix log files for any error messages or issues. The log files are typically located in /var/log/mail.log or /var/log/maillog. Look for any error messages that may provide clues about why emails are not being sent.
Firewall and Port Blocking: Ensure that there are no firewall rules or port blocking issues that might be preventing Postfix from sending emails. Port 25 is commonly used for SMTP, so make sure it is not blocked.
Recipient Address: You mentioned a "pink screen (recipient)." Make sure you are providing a valid recipient email address when sending emails. Double-check the recipient's email address for typos or errors.
Testing with Command Line: You can test sending an email from the command line using the mail or sendmail command to see if it works. For example:
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echo "This is a test email" | mail -s "Test Subject" recipient@example.com
Replace recipient@example.com with the actual recipient's email address.
Check for Email Queuing: If the emails are not being sent immediately, they may be queued. You can check the email queue by using the mailq command to see if there are any messages waiting to be sent.
If you provide more specific information about the error messages or any additional details about your setup, I can offer more targeted troubleshooting steps.
Thank you for an excellent lesson on how to build an MTA and MDA. Can you please advise what was the name of the Mail Client you've mentioned at the end of the video
Mysql Roundcube
@@HetmanRecovery , thank you.
Guys just so you know if you have a server in a LAN (Local area network) and have a router with a specific public IP address (good to be a static IP) is good to do these steps too that are not mentioned anywhere in the video:
1.
1.1: On Linux server open firewall ports (ufw allow "port_number"):
- 110 (POP3 ), 995 (POP3S) and
- 143 (IMAP ), 993 (IMAPS)
- 25 (SMTP)
1.2: On Windows server open the same firewall ports but with GUI
2. Open your router configuration which connects your LAN to your ISP (Internet service provider) WAN network and add port forwarding:
- External port 110 to Internal port 110 and IP of your server
- External port 995 to Internal port 995 and IP of your server
- External port 143 to Internal port 143 and IP of your server
- External port 993 to Internal port 993 and IP of your server
- Also a really important one External port 25 to Internal port 25 and IP of your server
3. test your POP3 or POP3S with www.wormly.com/ and your good to go and test records with mxtoolbox.com/
Good luck!!
oh also if anybody could tell me why when i send emails to accounts as: google.com or outlook.com or even hotmail.com the mail shows as spam in these accounts
Amazin !!!
Glad you found our video useful)
Hello having issues getting DKIM server to start back up with this tutorial. keep getting failed error code.
I have same problem. Have you positive resault ?
@@ZiiPrace Hello! I’m sorry to hear that you’re having trouble getting the DKIM server to start up. To troubleshoot this issue, here are some steps you can try:
Check Configuration Files: Make sure that the configuration files for the DKIM server are set up correctly. Check for any typos or errors in the configuration files that may be causing the server to fail.
Check Log Files: Look into the log files of the DKIM server to see if there are any error messages or clues as to why the server is failing to start. The log files can provide valuable information for troubleshooting.
= Restart the Server: Try restarting the server to see if it resolves the issue. Sometimes a simple restart can help in resolving startup problems.
Check Dependencies: Ensure that all the necessary dependencies for the DKIM server are installed and configured correctly. Missing dependencies can cause the server to fail to start.
Permissions: Check the permissions of the DKIM server files and directories to make sure that the server has the necessary permissions to start up.
Firewall Settings: Verify that the firewall settings on the server are not blocking the DKIM server from starting up. Adjust the firewall settings if needed.
Thank you your vedio was of great help for me. every thing is ok and I recived the emails in the spam folder,
but after installing opendkim and run it the status (sudo systemctl status opendkim) get me fail with amessage (" Failed to start OpenDKIM Milter." what should i do ??
the prolemm is solved . postfix, dovecot and opendkim are now working prporely. For the benifit of th reader : I was had 2 mistakes. 1> a syntax typo mistake in dovecte.conf and space after filer and user id: opendkim:opendkim in the openddkim.conf. Regards
If you're encountering the "Failed to start OpenDKIM Milter" error after installing OpenDKIM, there are a few common reasons and steps you can take to troubleshoot and resolve the issue. Here's a checklist to help you identify and fix the problem:
Check the Configuration File:
Make sure your OpenDKIM configuration file (/etc/opendkim.conf or /etc/opendkim/opendkim.conf) is correctly set up. Pay special attention to the KeyTable, SigningTable, and ExternalIgnoreList settings.
Check the Key and Signing Tables:
Verify that the KeyTable and SigningTable in your OpenDKIM configuration file are properly configured and point to valid paths.
Check the Key Files:
Ensure that the private key file specified in your OpenDKIM configuration (KeyFile parameter) exists and has the correct permissions.
Check the Socket Configuration:
Confirm that the Socket parameter in your OpenDKIM configuration is correctly configured. It should match the Milter socket specified in your mail server configuration.
Check for Port Conflicts:
Ensure that the port specified in your Milter configuration is not in use by another process. You can use the netstat command to check for port conflicts.
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netstat -tulpn | grep :
Check SELinux or AppArmor:
If you are using SELinux or AppArmor, make sure they are not blocking OpenDKIM. Check their logs for any related denials.
Check Log Files:
Examine the logs for more details on why OpenDKIM failed to start. The logs are typically located in /var/log/mail.log or /var/log/maillog. Look for any error messages or warnings related to OpenDKIM.
Recheck Configuration Syntax:
Use the following command to check the syntax of your OpenDKIM configuration:
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opendkim-testkey -d your_domain -s your_selector -k /path/to/your/private/key
Replace your_domain, your_selector, and /path/to/your/private/key with your actual domain, selector, and key path.
Update OpenDKIM:
Ensure that you are using the latest version of OpenDKIM. Consider updating to the latest version using your package manager.
Restart Services:
After making changes to the configuration, restart both OpenDKIM and your mail server to apply the changes:
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sudo systemctl restart opendkim
sudo systemctl restart your_mail_server
Check Systemd Journal:
Look into the systemd journal for more detailed information about why the OpenDKIM service failed to start:
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sudo journalctl -xe | grep opendkim
By going through these steps, you should be able to identify and resolve the issue causing OpenDKIM to fail during startup. If the problem persists, examining the specific error messages in the logs will likely provide more clues about the root cause.
is it okay if i dont set dns on cloudflare ?
Hello, this video is very well explained but i don't understand why i still go in the spam section. i followed all the steps and i even did search the reason and i did modify postfix settings but i still don't find it. Can someone help me out please ?
ptr
Hi, need help with properly configuring my postfix and devocot. I followed the instruction, but the mail sever test fail. Will appreciate your help in helping me setup.
please, go through all the points of the video again. There are many places where you can go wrong. So I won't immediately say what could have happened in your case
Hello, my mail server is working perfectly thank you. One qustion though how can i log the email user information on my phone using POP3. And i tried sending an email using wormly and giving an error
It's great to hear that your mail server is working well! Regarding logging email user information on your phone using POP3, I assume you're referring to accessing your email account on your phone via a POP3 client. POP3 (Post Office Protocol version 3) is a standard protocol used to retrieve emails from a remote server to a local client.
To access your email account on your phone using POP3, you typically need to follow these steps:
Open your email client: This could be the default email app on your phone or a third-party email app that you've installed.
Add an email account: In the settings or account setup section of your email client, there should be an option to add a new email account. Select this option.
Enter your email credentials: You'll be prompted to enter your email address and password, as well as the POP3 server settings for your email provider. These settings usually include the incoming server (POP3), the port number, and whether SSL/TLS encryption is required.
Configure additional settings: Depending on your email client, you may have options to configure additional settings such as whether to leave a copy of emails on the server, how often to check for new emails, etc.
Once you've entered all the necessary information and configured your email account on your phone, you should be able to access your emails via POP3.
As for the error you encountered while sending an email using Wormly, could you provide more details about the error message or the specific issue you encountered? This will help me provide a more accurate solution or suggestion.
I have installed an Ubuntu VM on oracle virtualbox, and I have followed this tutorial on setting up a postfix email server
However, i followed every step exactly, but somehow the DKIM Entry can't be found and POP3 service isn't working.
I also got my domain name from CloudFlare and set the configurations there
Has this got to do with it being a virtual machine?
DKIM Entry Not Found:
Double-check the DKIM configuration in your Postfix settings. Make sure the DKIM key is generated and added correctly to your DNS records in CloudFlare.
Verify that the DKIM selector in your DNS records matches the one specified in your Postfix configuration.
Ensure that the DNS records have propagated correctly. Sometimes it may take some time for changes to reflect.
POP3 Service Not Working:
Check if the POP3 service is enabled and running on your Postfix server. You can use tools like telnet to test the POP3 connection.
Verify that the necessary ports (usually port 110 for POP3) are open in your firewall settings.
Check the Postfix logs for any errors related to the POP3 service. This can help identify the root cause of the issue.
CloudFlare Configuration:
Ensure that your domain’s DNS settings in CloudFlare are correctly configured to point to your Ubuntu VM’s IP address.
Check if there are any CloudFlare firewall rules or settings that might be blocking POP3 traffic.
Being a virtual machine should not inherently cause these issues. VirtualBox is a popular virtualization platform, and many users successfully run email servers on VMs without issues. However, ensure that your VM has proper network connectivity and that there are no network-related issues causing the problems.
when using the command sudo systemctl restart dovecot
sudo: unable to resolve host domain.... No address associated with hostname how to fix it.Please help me
The error message you are encountering, "sudo: unable to resolve host domain... No address associated with hostname," suggests that there is an issue with your hostname resolution or the mapping of your hostname to the corresponding IP address.
To fix this issue, you can try the following steps:
Open the terminal on your system.
Edit the hosts file:
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sudo nano /etc/hosts
In the hosts file, you should see a line that associates your hostname with an IP address. It should look something like this:
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127.0.0.1 localhost
Verify that the line containing your hostname is correct. It should resemble:
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127.0.0.1 yourhostname
If the line is incorrect or missing, add it or modify it accordingly. Make sure to replace "yourhostname" with your actual hostname.
Save the changes and exit the text editor.
Restart the networking service:
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sudo systemctl restart networking
After completing these steps, try running the command again:
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sudo systemctl restart dovecot
The error message should no longer appear, and the command should execute successfully.
If the issue persists or you encounter any other problems, it is recommended to consult with your system administrator or seek further assistance from the appropriate support channels for your operating system.
port 25 is closed but ports 587 and 465 are open, can I send and receive email? thanks
Yes, you can potentially send and receive emails even if port 25 is closed, as long as you have alternative ports available. Port 25 is the default port for SMTP (Simple Mail Transfer Protocol), which is used for sending emails. However, many email providers also support alternative ports such as 587 and 465.
Port 587 is commonly used for secure email submission (SMTPS) and is often used with STARTTLS for encryption.
Port 465 is typically used for SMTP over SSL (SMTPS) and is considered the legacy standard for secure email transmission.
If your email client and email server support these alternative ports, you should be able to configure your email settings to use either port 587 or 465 for sending emails. However, it's important to note that the specific port configurations may vary depending on your email provider. You should refer to your email provider's documentation or support resources to find the correct settings.
Receiving emails typically involves different ports such as 110 (POP3) or 143 (IMAP) for unencrypted connections, or 995 (POP3S) or 993 (IMAPS) for encrypted connections. Again, you should check with your email provider for the correct settings.
In summary, if ports 587 and 465 are open and properly configured, you should be able to send emails securely. However, for receiving emails, you may need to ensure that the appropriate ports for incoming mail are also accessible.
6:05 I've tried this step multiple times and i haven't received anything in spam? but i have followed this exactly?
lograste resolverlo?
Hi Hetman, can you please make a video on Thunderbird Linux email client (MDA) commnicate with Postfix (MTA), as I can't send/receive emails via Thuderbird; where Send/Receive emails work via "/usr/sbin/sendmail" cli. Please note both Thunderbird and Postfix are installed on the same Ubuntu server
@@HetmanRecovery Hi Hetman, thanks very much for your prompt reply. I've tried all of that, however I still can't get it working. How does Dovecot fit into the picture? Isn't it the integration between Thunderbird (MUA) and Dovecot is the issue?
sudo postconf -e 'home_mailbox = Maildir\' after hitting that the new file is not created on the home derectory
The command sudo postconf -e 'home_mailbox = Maildir\' is used to configure the mailbox format for the Postfix mail server. In this command, you are setting the mailbox format to Maildir, which is a common format for storing email messages. However, running this command alone doesn't create the Maildir directory in the user's home directory. You need to do that separately.
To create the Maildir directory in a user's home directory, you can use the mkdir command. For example:
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sudo mkdir /home/username/Maildir
Replace /home/username with the actual path to the user's home directory. Make sure the directory is owned by the user, not by root, to ensure that the user has the necessary permissions to write to it. You can change the ownership of the directory using the chown command:
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sudo chown -R username:username /home/username/Maildir
Replace username with the actual username.
After creating the Maildir directory and setting the correct permissions, Postfix should start delivering emails to the user's Maildir.
Very good tutorial but still some questions to ask.. my advice answer too everybody ( are not hundred ) not only who say good job... my advice.
Glad our video was useful to you)
Salut, comment allez vous ?
S'il vous plaît j'ai un problème.
Quand je lance l'installation de postfix
On me dit impossible de trouver le dossier de postfix.
Salut ! Je vais bien, merci de demander. Je suis ici pour vous aider avec votre problème d'installation de Postfix.
L'erreur que vous rencontrez, "impossible de trouver le dossier de Postfix", peut être due à plusieurs raisons. Voici quelques étapes que vous pouvez suivre pour résoudre ce problème :
Assurez-vous que Postfix est bien installé : Vérifiez d'abord que Postfix n'est pas déjà installé sur votre système. Vous pouvez le faire en exécutant la commande suivante :
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dpkg -l | grep postfix
Si Postfix est déjà installé, vous devriez voir une liste de paquets associés à Postfix. Si ce n'est pas le cas, vous devrez peut-être l'installer avec la commande appropriée pour votre distribution Linux (par exemple, apt-get install postfix pour Ubuntu/Debian ou yum install postfix pour CentOS/RHEL).
Assurez-vous d'exécuter la commande en tant qu'administrateur : L'installation de logiciels système comme Postfix nécessite souvent des privilèges d'administrateur. Assurez-vous d'exécuter la commande d'installation en tant que superutilisateur ou avec les droits d'administrateur. Vous pouvez utiliser sudo pour cela :
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sudo apt-get install postfix
ou
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sudo yum install postfix
Vérifiez votre système de fichiers : Assurez-vous que le système de fichiers de votre système est en bon état et que le chemin d'installation de Postfix est accessible. Vous pouvez également vérifier si le répertoire de Postfix existe en utilisant la commande ls :
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ls /etc/postfix
Vous devriez voir les fichiers de configuration de Postfix s'il est installé correctement.
Vérifiez les erreurs dans les journaux : Si l'installation continue de poser problème, consultez les fichiers journaux pour plus d'informations sur l'erreur. Vous pouvez généralement trouver des informations dans les journaux système, par exemple, dans /var/log/syslog ou /var/log/mail.log sur les systèmes Debian/Ubuntu.
Si vous fournissez plus d'informations sur votre système d'exploitation et les messages d'erreur spécifiques que vous obtenez, je pourrais être en mesure de vous fournir une assistance plus précise.
Couldn't actually get postfix to deliver mail even to the spam folder... I must have done something wrong, but I don't know what the heck it is...
If you can't even get your mail to the spam folder, you probably have a problem with your Postfix configuration. Here are some possible causes of the problem and how to fix them:
Incorrect Postfix configuration files: check your Postfix configuration files (usually found in /etc/postfix/) and make sure the settings are correct. Make sure your settings in main.cf, master.cf, etc. are correct and meet your requirements.
Bugs in the firewall rules: Make sure that firewall rules do not block mail delivery to your Postfix server. If you are using a firewall, make sure that the rules allow connections on port 25 (for incoming mail) and the other ports that are used by Postfix.
DNS problems: check your DNS settings to make sure that they are configured correctly and that your Postfix server can resolve DNS queries. If DNS queries are blocked on your server, mail may not be delivered.
Authentication issues: If you are using authentication to send mail, make sure that your authentication settings are configured correctly and that users have the correct credentials.
Spam handling issues: If you are using the settings to handle spam, ensure that they are configured correctly and that the mail is considered spam according to your rules.
If none of these methods help, it is advisable to consult the Postfix logs to see what errors are occurring in the mail sending process. This may help you identify the problem and resolve it.
What should I put as mail recipient during postfix config
When configuring Postfix, the "mail recipient" refers to the email address where you want system-generated emails, such as mail delivery reports or error messages, to be sent.
Typically, you should set this to a valid email address that you have access to and regularly check. This could be an email address associated with your system administrator or a designated mailbox for system alerts.
Here's how you can set the mail recipient address in your Postfix configuration:
Open the Postfix main configuration file, usually located at /etc/postfix/main.cf, using a text editor such as vi or nano.
Look for the root parameter. This parameter specifies the email address where system-generated mail for the Postfix root user will be sent. If it's not already set, add or modify the line to set the root parameter to the desired email address. For example:
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root=your.email@example.com
Save the changes to the configuration file and exit the text editor.
After making changes to the configuration file, you need to reload or restart Postfix for the changes to take effect. You can do this using the following command:
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sudo systemctl reload postfix
Replace your.email@example.com with the actual email address where you want to receive system-generated emails. This email address should be accessible and regularly monitored to ensure you receive important notifications regarding your Postfix mail server.
@@HetmanRecovery thank you for the help
So be careful when using external services to test your configuration. Any passwords you use should be changed immediately.
Hi, very good tutorial. What if port 25 is blocked for outgoing e-mails. Will this work if you change to port 587?
Yes, changing the outgoing email port from 25 to 587 can often bypass issues related to port 25 being blocked. Here's why:
Port 25: Port 25 is traditionally used for SMTP (Simple Mail Transfer Protocol), which is primarily responsible for sending emails between servers. However, many ISPs and network administrators block outgoing traffic on port 25 to prevent spamming or unauthorized email relaying.
Port 587: Port 587 is the alternative SMTP submission port. It's specifically designated for email client (mail user agent) to email server (mail submission agent) communication. Unlike port 25, port 587 is often left unblocked by ISPs and network administrators, even when port 25 is restricted.
When you configure your email client or server to use port 587 for outgoing emails, you're essentially using it as a secure submission port. This means that your email client connects to the email server on port 587 to submit the email for delivery, and then the server takes care of delivering the email to its destination.
It's important to note that port 587 often requires authentication, meaning you'll need to provide your email credentials (username and password) to send emails through this port. This adds an extra layer of security compared to port 25, which is often used for server-to-server communication and may not require authentication in all cases.
In summary, if port 25 is blocked for outgoing emails, changing to port 587 can be an effective workaround, allowing you to continue sending emails without issues.
@@HetmanRecovery I'm testing this setup from a Azure ubuntu VM, it should be possible to run this setup from Azure, right?
Hello and thank for your excellent tutorial! Unfortunately I cannot send mail from an azure vm because of technical limitations, at least on port 25. MS says I should be able to send authenticated mail through port 587 at least.
how to change the port?
havin issues with unresolve host
Server can send emails but it will not receive emails. Any idea?
If your server is able to send emails but not receive them, there could be several potential reasons for this issue. Here are some common troubleshooting steps you can take:
Check DNS settings: Make sure that your domain's DNS settings are configured correctly, including MX (Mail Exchange) records pointing to the correct mail server.
Firewall and port settings: Ensure that your server's firewall settings allow inbound connections on the necessary ports for receiving emails. The default port for receiving emails via SMTP is port 25, but it could be configured differently.
Mail server configuration: Double-check the configuration of your mail server software (e.g., Postfix, Sendmail, Microsoft Exchange) to ensure that it's properly configured to receive emails. Check the configuration files for any errors or misconfigurations.
Mailbox configuration: Verify that the mailboxes you're trying to receive emails in are properly configured and not full. Also, check if there are any email forwarding rules set up that might be redirecting incoming emails elsewhere.
DNS blacklists: Check if your server's IP address is listed on any DNS blacklists. Being listed on a blacklist can cause other mail servers to reject emails from your server.
Network connectivity: Ensure that your server has a stable internet connection and can communicate with other mail servers. You can use tools like telnet to test connectivity to your server's email ports from external networks.
Check logs: Review the logs of your mail server software for any error messages or clues about why incoming emails are not being received. Logs can often provide valuable information for diagnosing email delivery issues.
Anti-virus/anti-spam software: If you have anti-virus or anti-spam software installed on your server, check its configuration to ensure that it's not blocking incoming emails unintentionally.
ISP restrictions: Some Internet Service Providers (ISPs) impose restrictions on inbound email traffic to prevent spam. Contact your ISP to verify if there are any restrictions in place that might be affecting your server's ability to receive emails.
By going through these steps, you should be able to identify and resolve the issue preventing your server from receiving emails. If you're still unable to resolve the problem, consider seeking assistance from a professional system administrator or IT support specialist.
i need help if connection refused what should i do 😭
What exactly is your error?
It works but cannot send mail via third party smtp, connection refused.. can you assist on that ?
Sure, I can try to help you troubleshoot the issue with sending mail via third-party SMTP. When you encounter a "connection refused" error while trying to send email, it usually means that the server you are trying to connect to is not accepting the connection request. There could be several reasons for this problem, so let's go through some common troubleshooting steps:
Check SMTP Server Address and Port: Verify that you are using the correct SMTP server address and port for the third-party email provider. Double-check the settings and make sure there are no typos or errors in the configuration.
Firewall or Router Blocking: Check if there are any firewalls or routers that might be blocking outgoing connections to the SMTP server. Ensure that the necessary ports (typically port 25 or 587 for SMTP) are open for outgoing traffic.
Antivirus or Security Software: Some antivirus or security software can block outgoing SMTP connections. Temporarily disable any such software and test if you can send emails.
ISP Restrictions: Some Internet Service Providers (ISPs) block outgoing connections on port 25 to prevent spamming. If your third-party SMTP server uses port 25, try using an alternative port like 587 or 465 (with SSL/TLS encryption).
SMTP Authentication: Ensure that you have configured SMTP authentication correctly with the third-party provider. Most SMTP servers require authentication (username and password) to send emails through their service.
Email Account Credentials: Double-check that you have entered the correct email account credentials (username and password) for the SMTP authentication.
SSL/TLS Encryption: If the third-party SMTP server requires SSL/TLS encryption, make sure you have enabled the appropriate settings in your email client or application.
Test Connectivity: Use network tools like telnet or nc to test if you can connect to the SMTP server from your NAS. For example, you can try running telnet smtp.example.com 587 to check the connection on port 587.
SMTP Server Status: Ensure that the third-party SMTP server is operational and not experiencing any outages. Check the provider's status page or contact their support for verification.
Email Sending Limitations: Some email providers impose limitations on the number of emails you can send per day. Check if there are any restrictions on your account.
Check Logs: Look for any error logs or messages on your NAS or email client that might provide more specific information about the "connection refused" issue.
If you have gone through these troubleshooting steps and are still experiencing the issue, consider contacting the support team of your third-party email provider. They can assist you with specific configuration details and verify if there are any issues with your account.
As you're dealing with sensitive information, make sure to avoid sharing any personal or login details here in this conversation.
that's chatgpt reply :D @@HetmanRecovery
its better to have installed mail client as well.
9:14 Before testing POP3S from Wormly, the port 995 must first be enabled on the server's *ufw* firewall, i.e. *sudo ufw allow 995*
Similar processes for POP3, IMAP and IMAPS:
*sudo ufw allow 993*
*sudo ufw allow 110*
*sudo ufw allow 143*
Without these ports open on the server, all POP3(S) and IMAP(S) tests from Wormly will simply fail
Thank you for the information! Yes, to test POP3S and other email protocols over secured ports, you need to allow the appropriate ports in the server firewall. The ufw utility is a frontend to iptables that allows you to manage firewall rules. The command "sudo ufw allow" allows you to allow traffic to the specified port.
Examples of commands to open ports in the firewall:
sudo ufw allow 995 - allow port 995 for POP3S
sudo ufw allow 993 - allow port 993 for IMAPS
sudo ufw allow 110 - allow port 110 for POP3
sudo ufw allow 143 - allow port 143 for IMAP
After allowing ports in firewall, you should check that appropriate services (POP3, IMAP etc.) are running and working correctly on the server.
Okay thanks hoe about the Logining part which account should i use? the root account is failing. or should i create a new account
After configuring opendkim, the service doesn't start. Error message: Job for opendkim.service failed because the control process exited with error code.
See "systemctl status opendkim.service" and "journalctl -xeu opendkim.service" for details. "Failed to start OpenDKIM Milter". Any idea what is wrong?
It seems like there might be an issue with the OpenDKIM service configuration. Here are a few steps you can take to troubleshoot and potentially resolve the problem:
Check Configuration Files: Ensure that the configuration files for OpenDKIM are set up correctly. Look for any syntax errors or typos in the configuration files.
Check Permissions: Make sure that the permissions on the configuration files and directories are set correctly so that the OpenDKIM service can access them.
Check SELinux: If you are using SELinux, make sure that the security context is set correctly for the OpenDKIM files and directories.
Check Logs: As the error message suggests, check the output of systemctl status opendkim.service and journalctl -xeu opendkim.service for more detailed error messages. This can help pinpoint the exact issue.
Restart Service: Try restarting the OpenDKIM service manually and see if any additional error messages are displayed. You can do this by running systemctl restart opendkim.service.
Reinstall OpenDKIM: If all else fails, you may want to consider reinstalling OpenDKIM to ensure that all files and dependencies are in place.
If you continue to experience issues, feel free to reach out to the OpenDKIM community or support for further assistance.
I tried to follow your instruction but stuck at the opendkim tutorial because I got this error:
May 23 19:18:36 mydomain.local systemd[1]: opendkim.service: Control process exited, code=exited, status=78/CONFIG
May 23 19:18:36 mydomain.local systemd[1]: opendkim.service: Failed with result 'exit-code'.
May 23 19:18:36 mydomain.local systemd[1]: Failed to start OpenDKIM Milter.
May 23 19:18:36 mydomain.local systemd[1]: opendkim.service: Scheduled restart job, restart counter is at 5.
May 23 19:18:36 mydomain.local systemd[1]: Stopped OpenDKIM Milter.
May 23 19:18:36 mydomain.local systemd[1]: opendkim.service: Start request repeated too quickly.
May 23 19:18:36 mydomain.local systemd[1]: opendkim.service: Failed with result 'exit-code'.
May 23 19:18:36 mydomain.local systemd[1]: Failed to start OpenDKIM Milter.
Can you help me?
When I checked the log, I got this error:
opendkim[22063]: opendkim: /etc/opendkim.conf: refile: /etc/opendkim/TrustedHosts: dkimf_db_open(): No such file or directory
The file TrustedHosts is already there but it seems the opendkim software couldn't detect it was there. I already chmod 755 all of them but nothing worked, changed the ownership to opendkim doesn't work too
The error message you provided suggests that the OpenDKIM service failed to start due to a configuration issue. Here are a few steps you can take to troubleshoot and resolve the problem:
Check OpenDKIM configuration: Verify that your OpenDKIM configuration file (usually located at /etc/opendkim.conf) is correctly set up. Make sure all required settings, such as the domain name, paths to key files, and socket settings, are accurate.
Verify file permissions: Ensure that the necessary files and directories used by OpenDKIM have the correct permissions. The OpenDKIM configuration file, key files, and directories should be readable by the OpenDKIM process. You can check and adjust file permissions using the chmod command.
Verify file paths: Double-check that the paths specified in your OpenDKIM configuration file are correct and accessible. Make sure the paths to the key files and other required files are accurate. If any paths have changed or files have been moved, update the configuration file accordingly.
Check for syntax errors: Use the OpenDKIM configuration file syntax checker (opendkim-genkey) to ensure that your configuration file does not contain any syntax errors or typos. Running this command can help identify and correct any configuration issues.
Restart the OpenDKIM service: After making any necessary changes to the configuration file or file permissions, try restarting the OpenDKIM service using the appropriate command for your Linux distribution. For example, you can use systemctl restart opendkim or service opendkim restart.
Check system logs: Monitor the system logs (e.g., /var/log/syslog, /var/log/mail.log) for any additional error messages or clues about the cause of the failure. These logs may provide more specific information about the configuration issue.
If you're still encountering issues after following these steps, it may be helpful to consult the official OpenDKIM documentation, seek assistance from the OpenDKIM community or forum, or consult with a system administrator or IT professional who has experience with OpenDKIM and email server configuration.
The error message you provided indicates that the OpenDKIM service is unable to find the TrustedHosts file in the expected location. Here are a few steps you can take to troubleshoot and resolve the issue:
Verify the file location: Double-check the file path and ensure that the TrustedHosts file is located in the correct directory (/etc/opendkim/TrustedHosts). It's important to note that Linux is case-sensitive, so make sure the filename is spelled correctly with the appropriate capitalization.
Check file permissions: Ensure that the TrustedHosts file has appropriate permissions for the OpenDKIM service to access it. Use the ls -l command to check the file's permissions. The file should be readable by the OpenDKIM process. You can use the chmod command to modify the file permissions if needed.
Verify the ownership: Confirm that the TrustedHosts file is owned by the correct user or group. In this case, the owner should be the opendkim user. You can use the chown command to change the ownership if necessary.
Restart the OpenDKIM service: After making any changes to the file location, permissions, or ownership, restart the OpenDKIM service using the appropriate command for your Linux distribution. For example, you can use systemctl restart opendkim or service opendkim restart.
Check for SELinux or AppArmor restrictions: If your system has SELinux or AppArmor enabled, these security mechanisms might be preventing OpenDKIM from accessing the TrustedHosts file. You can check the SELinux status using the sestatus command. If SELinux is enabled, you may need to update the SELinux context for the TrustedHosts file using the chcon command. Similarly, for AppArmor, you may need to modify the AppArmor profile to allow access to the file.
Verify the configuration file: Double-check the OpenDKIM configuration file (/etc/opendkim.conf) to ensure that the path to the TrustedHosts file is specified correctly. The configuration entry should resemble TrustedHosts /etc/opendkim/TrustedHosts. If there are any typos or incorrect paths in the configuration file, correct them and restart the OpenDKIM service.
If the issue persists after trying these steps, it may be helpful to consult the official OpenDKIM documentation, seek assistance from the OpenDKIM community or forum, or consider reaching out to a system administrator or IT professional for further assistance.
@@Dazolers I have the same problem. Were you able to find a solution?
Well, I found what was wrong. If you rewrite the configuration just like it says in the tutorial at 12:38, you will have an error. This configuration should look like this:
ExternalIgnoreList refile:/etc/opendkim/TrustedHosts
That means that there must not be an empty space between the "refile" and the address like in a video.
Hello, my mail server is working perfectly thank you. One qustion though how can i log the email user information on my phone using POP3. And i tried sending an email using wormly and giving an error
To log the email user information on your phone using POP3, you will need to configure your email client on your phone to use the POP3 protocol. Here are the general steps to set up a POP3 email account on a phone:
Open the email client application on your phone.
Tap on the option to add a new email account.
Enter your email address and password.
Select the POP3 protocol for incoming mail.
Enter the incoming mail server (POP3 server) and port number. This information can be obtained from your email service provider.
Choose the security settings for the incoming mail server (SSL/TLS or none).
Enter the outgoing mail server (SMTP server) and port number. Again, this information can be obtained from your email service provider.
Choose the security settings for the outgoing mail server (SSL/TLS or none).
Set the authentication method for the outgoing mail server (usually the same as the incoming server).
Save the settings and test the connection to ensure it is working.
As for the error you encountered while sending an email using Wormly, it would be helpful to know the specific error message you received. This will allow us to provide more accurate assistance in troubleshooting the issue.