diff -ur roundcubemail-1.4.11.18/config/defaults.inc.php roundcubemail-1.4.11.18.default-configuration/config/defaults.inc.php

--- roundcubemail-1.4.11.18/config/defaults.inc.php 2021-09-01 10:16:03.000000000 +0200

+++ roundcubemail-1.4.11.18.default-configuration/config/defaults.inc.php   2021-09-01 11:06:27.948930836 +0200

@@ -692,7 +692,7 @@

 //    RewriteRule ^/roundcubemail/[a-zA-Z0-9]{16}/(.*) /roundcubemail/$1 [PT]

 //    Alias /roundcubemail /var/www/roundcubemail/

 // Note: Use assets_path to not prevent the browser from caching assets

-$config['use_secure_urls'] = false;

+$config['use_secure_urls'] = true;

 // Allows to define separate server/path for image/js/css files

 // Warning: If the domain is different cross-domain access to some

@@ -701,11 +701,11 @@

 //    <FilesMatch ".(eot|ttf|woff)">

 //    Header set Access-Control-Allow-Origin "*"

 //    </FilesMatch>

-$config['assets_path'] = '';

+$config['assets_path'] = '/roundcubemail/assets/';

 // While assets_path is for the browser, assets_dir informs

 // PHP code about the location of asset files in filesystem

-$config['assets_dir'] = '';

+$config['assets_dir'] = '/usr/share/roundcubemail/public_html/assets/';

 // ----------------------------------

@@ -797,7 +797,7 @@

 // - 'enchant' - requires the PHP Enchant module

 // - 'atd'     - install your own After the Deadline server or check with the people at http://www.afterthedeadline.com before using their API

 // You can connect to any other googie-compliant service by setting 'spellcheck_uri' accordingly.

-$config['spellcheck_engine'] = 'googie';

+$config['spellcheck_engine'] = 'pspell';

 // For locally installed Nox Spell Server or After the Deadline services,

 // please specify the URI to call it.

@@ -1195,7 +1195,7 @@

 $config['display_next'] = true;

 // Default messages listing mode. One of 'threads' or 'list'.

-$config['default_list_mode'] = 'list';

+$config['default_list_mode'] = 'threads';

 // 0 - Do not expand threads

 // 1 - Expand all threads automatically

​