<VirtualHost *:443>
  ServerName poste.example.org

#IP de la Poste :
ProxyPass / http://192.168.1.90/
ProxyPassReverse / http://192.168.1.90/

ProxyRequests off
ProxyPreserveHost on
                <Proxy *>
                Options FollowSymLinks MultiViews
                AllowOverride All
                Order allow,deny
                allow from all
                </Proxy>

SSLEngine on
SSLCertificateFile /etc/letsencrypt/live/poste.example.org/fullchain.pem
SSLCertificateKeyFile /etc/letsencrypt/live/poste.example.org/privkey.pem

</VirtualHost>