How To Install courier-filter-perl on Ubuntu 22.04

In this tutorial we learn how to install courier-filter-perl on Ubuntu 22.04. courier-filter-perl is purely Perl-based mail filter framework for the Courier MTA

Introduction

In this tutorial we learn how to install courier-filter-perl on Ubuntu 22.04.

What is courier-filter-perl

courier-filter-perl is:

Courier::Filter implements the Courier MTA’s courierfilter interface as a framework for mail filter modules. Authors of filter modules can concentrate on writing the actual filter logic without having to care about the usual low-level details of the courierfilter interface. Logging to various facilities is also supported.

Courier::Filter allows multiple filter modules to be installed in stacked and hierarchically grouped configurations. Also, modules’ polarity can be reversed, so some modules can be used for explicitly accepting messages while others are used in the traditional way for rejecting messages.

The following filter modules are included:

  • BlankBody: matching of blank bodies (a stupid spammer symptom)
  • DNSBL: matching of calling MTA’s IP address against DNS black-lists
  • SPF: authentication of sender addresses in inbound messages
  • SPFout: authentication of sender addresses in outbound messages
  • Envelope: matching of RFC 2821 message envelope fields
  • Header: matching of RFC 2822 message header fields
  • FakeDate: detection of implausible and malformed date header fields
  • ClamAVd: malware detection using the ClamAV scanner
  • SpamAssassin: spam detection using SpamAssassin
  • Parts: matching of MIME parts and ZIP archive contents
  • SendCopy: sending message copies to additional recipients

There are three methods to install courier-filter-perl on Ubuntu 22.04. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.

Install courier-filter-perl Using apt-get

Update apt database with apt-get using the following command.

sudo apt-get update

After updating apt database, We can install courier-filter-perl using apt-get by running the following command:

sudo apt-get -y install courier-filter-perl

Install courier-filter-perl Using apt

Update apt database with apt using the following command.

sudo apt update

After updating apt database, We can install courier-filter-perl using apt by running the following command:

sudo apt -y install courier-filter-perl

Install courier-filter-perl 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 Ubuntu. Update apt database with aptitude using the following command.

sudo aptitude update

After updating apt database, We can install courier-filter-perl using aptitude by running the following command:

sudo aptitude -y install courier-filter-perl

How To Uninstall courier-filter-perl on Ubuntu 22.04

To uninstall only the courier-filter-perl package we can use the following command:

sudo apt-get remove courier-filter-perl

Uninstall courier-filter-perl And Its Dependencies

To uninstall courier-filter-perl and its dependencies that are no longer needed by Ubuntu 22.04, we can use the command below:

sudo apt-get -y autoremove courier-filter-perl

Remove courier-filter-perl Configurations and Data

To remove courier-filter-perl configuration and data from Ubuntu 22.04 we can use the following command:

sudo apt-get -y purge courier-filter-perl

Remove courier-filter-perl configuration, data, and all of its dependencies

We can use the following command to remove courier-filter-perl configurations, data and all of its dependencies, we can use the following command:

sudo apt-get -y autoremove --purge courier-filter-perl

References

Summary

In this tutorial we learn how to install courier-filter-perl package on Ubuntu 22.04 using different package management tools: apt, apt-get and aptitude.