Installing OpenSMTPD on Clear Linux Latest

OpenSMTPD is a free and open-source mail server that was created to replace Sendmail. It is a simpler and more secure option for sending and receiving emails. In this tutorial, you will learn how to install OpenSMTPD on Clear Linux Latest.

Requirements

Before we begin, ensure that the following requirements are met:

  • A computer running Clear Linux Latest
  • A user account with root privileges
  • A stable internet connection

Installation

  1. Update your system using the following command:
sudo swupd update
  1. Install OpenSMTPD by running the following command:
sudo swupd bundle-add opensmtpd
  1. Verify that OpenSMTPD was installed by checking its version:
sudo smtpctl show version

Output:

OpenSMTPD 6.4.2p1 [-fopenmpv-] [daemon] [filter-regex-pcre] [inotify] [queue-runs-queue] [ssl] [tls] [json] [dane]

Configuration

Now that OpenSMTPD is installed, you need to configure it to start sending and receiving emails. Follow these steps to configure OpenSMTPD:

  1. Open the OpenSMTPD configuration file using your preferred text editor:
sudo nano /etc/mail/smtpd.conf
  1. Configure your hostname by adding the following line to the configuration file:
listen on lo0 hostname <yourhostname>

Replace <yourhostname> with your server's hostname.

  1. Configure your domain name by adding the following line to the configuration file:
table aliases file:/etc/mail/aliases
  1. Add your email aliases to the /etc/mail/aliases file. For example:
root: [email protected]

This will redirect emails sent to the root user to the [email protected] email address.

  1. Save and close the configuration file.

  2. Verify your configuration by running the following command:

sudo smtpctl check

If there are no errors, the command will output "syntax OK."

Starting OpenSMTPD

To start OpenSMTPD, run the following command:

sudo systemctl start opensmtpd

To ensure that OpenSMTPD starts automatically at boot, run the following command:

sudo systemctl enable opensmtpd

Conclusion

You have successfully installed and configured OpenSMTPD on Clear Linux Latest. You can now start sending and receiving emails using your new mail server.