The default Roudcube favicon is… Ugly. Nothing wrong with the logo by itself, just not… as favicon… Here’s how to change it: First, Upload a new favicon (ico or small png recommended) to Roundcubes www-root (/var/www/html/roundcube for me) Second, Verify that you can reach the previously uploaded favicon. Ex. example.com/favicon.{png,ico} Third, Append to Roundcubes config/config.inc.php…