roundcube filter plugin

 /var/www/html/roundcubemail-1.6.0/config

config.inc.php

// List of active plugins (in plugins/ directory)

$config['plugins'] = array(

    'archive',

    'zipdownload',

    'filters',

    'twofactor_gauthenticator',

);

plugin should be in plugins folder

To install the plugin you have to:

1. Download zip-archive to Roundcube/plugins folder;
2. Unzip downloaded zip-archive;
3. Rename unziped folder to 'filters';
4. Add "filters" in the plugins section of the roundcube configuration (config/config.inc.php). For example:

$config['plugins'] = array(
 'archive',
 'password',
 'filters',
);