OpenSMTPD on NetBSD

How to install OpenSMTPD on NetBSD

OpenSMTPD is a free and open-source mail transfer agent. This tutorial will guide you through the installation process of installing OpenSMTPD from the official source on NetBSD.

Prerequisites

Before we begin, make sure your NetBSD system is up to date by running the following command as root or with administrative privileges:

# pkgin update

Download and Install OpenSMTPD

First, download OpenSMTPD source code from the official website https://opensmtpd.org/:
```
$ ftp https://opensmtpd.org/archives/opensmtpd-x.y.z.tar.gz
```
Replace x.y.z with the latest version number available on the website.
Extract the downloaded archive by running the following command in the terminal:
```
$ tar -zxvf opensmtpd-x.y.z.tar.gz
```
Replace x.y.z with the version number of OpenSMTPD you downloaded.
Change to the newly created OpenSMTPD directory:
```
$ cd opensmtpd-x.y.z
```
Configure the OpenSMTPD installation by running the following command:
```
$ ./configure
```
This command will create the make file for OpenSMTPD based on your system settings and dependencies.
Compile and install OpenSMTPD by running the following command:
```
$ make install
```
This will compile and install all the necessary binaries, libraries, and configuration files.

Configure OpenSMTPD

Once OpenSMTPD is installed, it needs to be configured before it can be used. The configuration files are located in /etc/mail/.

Edit the /etc/mail/smtpd.conf file to configure your mail server settings:
```
# vi /etc/mail/smtpd.conf
```
Set up aliases for receiving and sending email:
```
root: [email protected]
```
Restart the OpenSMTPD service to apply the changes:
```
# /etc/rc.d/smtpd restart
```

Conclusion

OpenSMTPD is now installed and working on your NetBSD system. By following the steps mentioned above, you have successfully installed and configured OpenSMTPD on your NetBSD system. You can now use your mail server to send and receive emails.