How To Install esmtpd on Debian 11

In this guide, we’ll discuss How To Install esmtpd on Debian 11. Also, we will demonstrate how to uninstall and update esmtpd.

One-liner install command

For those in a hurry, here's a one-line installation command:

sudo apt-get update && sudo apt -y install courier-mta

But if you are interested in the detailed steps with descriptions, the following information is for you.

What is esmtpd and what are the ways to install it?

Before beginning this tutorial, you will need access to a server or computer running Debian 11. This guide was written specifically with a server running Debian 11 in mind, although it should also work on older, supported versions of the operating system.

Also, make sure you are running a regular, non-root user with sudo privileges configured on your server. When you have an account available, log in as your non-root user to begin.

There are several ways to install esmtpd on Debian 11. You can use (links are clickable):

In the following sections, we will describe each method in detail. You can choose one of them or refer to the recommended one.

Install esmtpd using apt-get

First, update apt database with apt-get using the following command.

sudo apt-get update

After updating apt-get database, You can install esmtpd using apt by running the following command:

sudo apt -y install courier-mta

Install esmtpd using apt

Because esmtpd is available in Debian 11’s default repositories, it is possible to install it from these repositories using the apt packaging system.

To begin, update apt database with apt using the following command.

sudo apt update

After updating apt database, You can install esmtpd using apt by running the following command:

sudo apt -y install courier-mta

Install esmtpd using aptitude

If you want to follow this method, you might need to install aptitude first since aptitude is usually not installed by default on Debian 11. Update apt database with aptitude using the following command.

sudo aptitude update

After updating aptitude database, You can install esmtpd by running the following command:

sudo aptitude -y install courier-mta

How to upgrade (update) a single package esmtpd using apt-get?

First, you will need to update packages index. Run update command as usual:

sudo apt-get update

Next, to upgrade only the esmtpd, e.g. single package, you should use the following format with the apt-get command/apt command:

sudo apt-get --only-upgrade install courier-mta

Note that this command will not install any new packages! If you wish to install the package if it doesn't exist you may leave out --only-upgrade part.

How To Uninstall esmtpd from Debian 11

To uninstall only the esmtpd package you can execute the following command:

sudo apt-get remove courier-mta

Uninstall esmtpd and all its dependencies

To uninstall esmtpd and its dependencies that are no longer needed by Debian 11, you can use the command below:

sudo apt-get -y autoremove courier-mta

Remove esmtpd with all configurations and data

To remove esmtpd configuration and data from your system you can run the following purge command:

sudo apt-get -y purge courier-mta

Remove esmtpd completely (configurations, data and all of its dependencies)

And lastly, you can run the next command to remove absolutely everything related to esmtpd package, e.g.: configurations, data and all of its dependencies. Just use this command:

sudo apt-get -y autoremove --purge courier-mta

Extra info and code examples

The Courier mail transfer agent (MTA) is an integrated mail/groupware server based on open commodity protocols, such as ESMTP, IMAP, POP3, LDAP, TLS, and HTTP. Courier provides ESMTP, IMAP, POP3, webmail, and mailing list services within a single, consistent, framework. This package provides an ESMTP daemon which uses the Maildir format as native storage format, supports IPv6, implements SMTP extensions for mailing list management and features integrated mail filtering. It can function as an intermediate mail relay, relaying mail between an internal LAN and the Internet, or perform final delivery to mailboxes. ESMTP over TLS is handled by the regular ESMTP daemon in conjunction with the TLS wrapper.

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You now have a full guide on how to install esmtpd using apt, apt-get and aptitude tools. Also, we showed how to update as a single package and different ways to uninstall the esmtpd from Debian 11.

See also:

How To Install esmtpd on Ubuntu 22.04

How To Install esmtpd on Debian 11

How To Install esmtpd on Fedora 34

How To Install esmtpd on Ubuntu 21.04

How To Install esmtpd on CentOS 8