Alias /roundcubemail /usr/share/roundcubemail

<Directory /usr/share/roundcubemail>
    Require all granted
</Directory>

<Directory /usr/share/roundcubemail/installer>
    Require local
</Directory>

<Directory /usr/share/roundcubemail/bin/>
    Require all denied
</Directory>

<Directory /usr/share/roundcubemail/plugins/enigma/home/>
    Require all denied
</Directory>