Roundcube Clacks Overhead Plugin

Roundcube plugin that adds the X-Clacks-Overhead: GNU Terry Pratchett header to all outgoing mail sent via Roundcube. Once enabled, this plugin needs no configuration.

See GNU Terry Pratchett for more plugins for other software as well as background information to this plugin.

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Requirements

• Roundcube 1.6+
• PHP 7.4+

Installation

1. Download the latest release ZIP from the Releases page
2. Extract the archive — it will create a folder named clacks_overhead
3. Move the clacks_overhead folder into your Roundcube plugins/ directory
4. Add the plugin to your config/config.inc.php:

$config['plugins'] = ['clacks_overhead'];

Features

• Adds X-Clacks-Overhead: GNU Terry Pratchett to all outgoing emails
• Displays an animated Clacks tower indicator in the message header when receiving mail that carries the header — click to learn more about the project

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Disclaimer

This is a personal fork of the original plugin by Martin Porcheron, updated for compatibility with current PHP and Roundcube versions.

This fork is not actively maintained. Use at your own risk.

License

MIT — see LICENSE