How to Install Sendmail on Ubuntu Server Latest

Introduction

Sendmail is an open-source email solution that is available as a free download from Proofpoint's website. It is a popular choice for many users who want a reliable email server that is easy to install and configure on Ubuntu servers. In this tutorial, we will guide you through the process of installing and configuring Sendmail on Ubuntu Server Latest.

Prerequisites

Before we begin, you will need to have the following:

A server running Ubuntu Server Latest
A sudo user
An internet connection

Installing Sendmail

Follow these steps to install Sendmail on Ubuntu Server Latest:

Open the terminal on your Ubuntu Server Latest by pressing CTRL + ALT + T or by clicking on the terminal icon on the desktop.
Update the package list and system by typing the following command in the terminal and pressing Enter:
```
sudo apt update && sudo apt upgrade
```
Install Sendmail by typing the following command in the terminal and pressing Enter:
```
sudo apt install sendmail
```
During the installation process, you will be prompted to configure Sendmail. Choose the default option and press Enter.
After the installation is complete, verify that Sendmail was installed correctly by typing the following command in the terminal and pressing Enter:
```
which sendmail
```
This command should return the path of the Sendmail executable file.
Start the Sendmail service by typing the following command in the terminal and pressing Enter:
```
sudo systemctl start sendmail
```
You can also stop and restart the Sendmail service using the following commands:
```
sudo systemctl stop sendmail

sudo systemctl restart sendmail
```
Verify that the Sendmail service is running by typing the following command in the terminal and pressing Enter:
```
sudo systemctl status sendmail
```
If the service is running correctly, you should see a message indicating that Sendmail is active.

Configuring Sendmail

By default, Sendmail is configured to send and receive emails using the localhost or 127.0.0.1 IP address. If you want to configure Sendmail to use a different IP address or SMTP server, follow the steps below:

Open the Sendmail configuration file located in the /etc/mail/ directory:
```
sudo vi /etc/mail/sendmail.mc
```
Locate the following line in the configuration file:
```
dnl define(`SMART_HOST', `smtp.your.provider')dnl
```
Uncomment this line by removing the dnl in the beginning of the line.
Replace smtp.your.provider with the address of your SMTP server.
Save and close the configuration file.
Rebuild the Sendmail configuration file by typing the following command in the terminal and pressing Enter:
```
sudo m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf
```
Restart the Sendmail service by typing the following command in the terminal and pressing Enter:
```
sudo systemctl restart sendmail
```

Conclusion

Sending and receiving emails through the command line is an essential feature of an Ubuntu server to keep communication between the system admins and other users simple and secure. By following the steps outlined in this tutorial, you should be able to install and configure Sendmail on Ubuntu Server Latest with ease.