How to customize Roundcube settings

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To customize Roundcube settings you need to create a file named config.inc.php in the roundcube directory of your Poste.io data directory. This file will be included by the main Roundcube configuration file config/config.inc.php and can be used to override the settings defined there.

Here is an example of a roundcube/config.inc.php file that sets the default skin to larry:

<?php

$config['skin'] = 'larry';

You can find a list of all available settings in the Roundcube documentation.

Another comprehensive way to customize Roundcube or any other part of Poste.io is explained at Poste.io customization.