How to Install Sendmail on NetBSD

In this tutorial, we will guide you through the steps to download and install Sendmail on NetBSD. Sendmail is an open-source and widely used mail transfer agent that can send and receive email messages.

Step 1 - Downloading Sendmail

The first step is to download the latest version of Sendmail from the official website:

$ ftp https://opensource.proofpoint.com/pub/projects/sendmail/sendmail.8.16.0.tar.gz

Step 2 - Extracting Sendmail

After the download is complete, you need to extract the Sendmail source code using the following command:

$ tar xvzf sendmail.8.16.0.tar.gz

Step 3 - Installing Sendmail

Before installing Sendmail, you may need to install some other utilities and libraries. NetBSD uses the pkg_add command to install software packages. To install Sendmail and its dependencies, execute the following command:

$ pkg_add -v -I sendmail-8.16.0p0.tgz

This will install Sendmail along with other required libraries.

Step 4 - Configuring Sendmail

After installation, the Sendmail configuration file needs to be edited. The configuration file is located at /etc/mail/sendmail.cf. Use your favorite text editor to make changes in this file. Here is an example configuration file to get you started:

# This is the base Sendmail configuration file.

######## SMTP server options ########
# Listen on all interfaces
O DaemonPortOptions=Name=MTA, Addr=0.0.0.0, Family=inet

######## Untrusted configurations ########
# Relaying is not allowed by default.
O PrivacyOptions=authwarnings,needmailhelo,noexpn,noreceipts,restrictqrun

######## Email Address rewriting ########
# Masquerade as "example.com" for outgoing emails
MasqueradeAs=example.com

# Force incoming emails to be rewritten to "example.com"
VirtHostEnt=example.com
VirtHostName=example.com

# Allow users on local network to send emails
Cwlocalhost=localhost
Cwexample.com
FEATURE(relay_entire_domain)dnl

You can customize the configuration file for your specific needs. After making changes, save the file and restart Sendmail to apply the new settings:

$ /etc/rc.d/sendmail restart

Step 5 - Testing Sendmail

To test if Sendmail is working, try sending an email from the command line:

$ echo "Test email from Sendmail" | mail -s "Test email" your.email@example.com

Replace your.email@example.com with your actual email address. If Sendmail is correctly installed and configured, you should receive an email in your inbox.

Conclusion

In this tutorial, we have provided a step-by-step guide on how to install Sendmail on NetBSD. By following these steps, you should be able to set up Sendmail for your email transfer needs.

If you want to self-host in an easy, hands free way, need an external IP address, or simply want your data in your own hands, give IPv6.rs a try!

Alternatively, for the best virtual desktop, try Shells!