How to Install EmailRelay on Fedora CoreOS Latest

EmailRelay is a mail transfer agent (MTA) that helps you relay emails from one server to another. In this tutorial, we will show you how to install EmailRelay on Fedora CoreOS Latest.

Prerequisites

A running instance of Fedora CoreOS Latest
SSH access to the Fedora CoreOS Latest instance
Basic knowledge of Linux commands

Step 1: Install the required packages

We need to install the required packages before installing EmailRelay on Fedora CoreOS Latest. Open the terminal and run the following command:

$ sudo dnf install gcc make openssl-devel

Step 2: Download and extract EmailRelay

Next, we need to download and extract the EmailRelay source code. Run the following command to download it:

$ wget https://github.com/rnwood/smtp-proxy/releases/download/v2.0a1/emailrelay-2.0a1.tar.gz

After the download, extract the source code using the following command:

$ tar -xzvf emailrelay-2.0a1.tar.gz
$ cd emailrelay-2.0a1

Step 3: Build and install EmailRelay

Now, we will build and install EmailRelay on Fedora CoreOS Latest. Run the following command to configure and build EmailRelay:

$ ./configure && make

After the build is complete, install EmailRelay using the following command:

$ sudo make install

Step 4: Configure EmailRelay

Next, we need to configure EmailRelay. Open the configuration file using the following command:

$ sudo nano /usr/local/etc/emailrelay.conf

In the configuration file, set the following parameters according to your email server settings:

# set the email server hostname or IP address
remotes = mail.example.com
# set the port used by the email server
remoteport = 25
# set the local email server hostname or IP address
local = localhost
# set the port used by the local email server
localport = 25
# set the email relay authentication
#auth = myusername:mypassword

Save and close the file when you are done.

Step 5: Start EmailRelay

Finally, we will start EmailRelay. Run the following command to start the service:

$ sudo systemctl start emailrelay

If you want EmailRelay to start automatically on boot, run the following command:

$ sudo systemctl enable emailrelay

Conclusion

In this tutorial, we have shown you how to install EmailRelay on Fedora CoreOS Latest. You can now use EmailRelay as a mail transfer agent to relay emails from one server to another.