OpenSMTPD Installation guide for OpenBSD

This tutorial will guide you through the installation process of OpenSMTPD on OpenBSD. OpenSMTPD is an open source implementation of the Simple Mail Transfer Protocol. It is designed with security in mind and is easy to configure.

Note: This tutorial assumes that you are running OpenBSD.

Prerequisites

Before we begin, you will need to make sure that your system meets the following requirements:

  • A server running OpenBSD
  • A user account with sudo privileges
  • A stable internet connection

Installation

To install OpenSMTPD on OpenBSD, follow the steps below:

  1. Update the package database:
sudo pkg_add -u
  1. Install OpenSMTPD:
sudo pkg_add opensmtpd
  1. Enable the OpenSMTPD service:
sudo rcctl enable smtpd
  1. Start the OpenSMTPD service:
sudo rcctl start smtpd
  1. Verify that the OpenSMTPD service is running:
sudo rcctl check smtpd

Configuration

By default, OpenSMTPD is ready to use without any configuration. However, if you want to customize the configuration, you can modify the configuration file /etc/mail/smtpd.conf.

To edit the configuration file using the vi editor, run the following command:

sudo vi /etc/mail/smtpd.conf

After making changes to the configuration file, you will need to reload the OpenSMTPD service to apply the changes:

sudo rcctl reload smtpd

Conclusion

Congratulations! You have successfully installed OpenSMTPD on OpenBSD. You are now ready to receive and send email with OpenSMTPD.