Plugin to customize logo, watermark image and stylesheets by config.
Download and install via http://plugins.roundcube.net
Set the following options directly in Roundcube's main config file or via host-specific configurations:
// define a custom watermark image (relative or absolute URL)
$config['custom_watermark_image'] = './skins/custom_watermark.png';
// define a custom URI to be displayed instead of the empty watermark page
$config['custom_watermark_uri'] = '';
// define a custom favicon image (emtpy string to remove it)
$config['custom_favicon'] = './skins/custom_favicon.ico';
// defines a custom CSS file which is added to every page
$config['custom_stylesheet'] = './skins/custom_stylez.css';