Lab
A Cloud Guru

Configuring Outgoing Mail Server

For many reasons, email service is essential. Being able to configure an email server is something every System Administrator should know how to do. This lab will give some practice in doing just that. By default only local mail is available and it cannot be sent or received from our network. In this activity, you will reconfigure the Postfix mail server to support sending and receiving email from the network.

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Path Info

Level

Intermediate

Duration

15m

Published

Jan 17, 2020

Challenge

Install the Postfix Mail Server, and the mailx and Mutt Mail Clients
Become the root user using sudo and use the yum command to install the software for the Postfix mail server, as well as the mailx and Mutt email clients:
```
sudo -i
yum -y install postfix mailx mutt
```
Challenge

Configure Postfix to Listen on All Network Interfaces
Use the postconf command to configure the Postfix mail server to listen on all network interfaces:
```
postconf -e inet_interfaces=all
```
Challenge

Enable and Start the postfix Service
Use the systemctl command to enable and start the postfix service:
```
systemctl enable postfix.service --now
```
Challenge

Send a Test Message with the mail Command and Check the Log to See if It was Delivered
Using the mail command send a message with the subject test to cloud_user that contains the contents of the /etc/hosts file:
```
mail -s 'test' cloud_user@server1 < /etc/hosts
```
Challenge

Verify That Outgoing Mail is Working
Using the tail command, verify that the message was delivered. Return to the cloud_user account and view the message using the mutt command:
```
tail /var/log/maillog
exit
mutt
```
Press Enter to create the Mail directory in our home directory if necessary.

Press q to quit mutt.

Author

A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

What's a lab?

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.