You have issues with your SSL configuration:
$ echo -e "HEAD / HTTP/1.0\r\nHost: www.empruntemontoutou.com\r\n\r\n" | openssl s_client -servername www.empruntemontoutou.com -connect www.empruntemontoutou.com:443 -state -quiet
SSL_connect:before/connect initialization
SSL_connect:SSLv2/v3 write client hello A
SSL_connect:SSLv3 read server hello A
depth=0 OU = Domain Control Validated, OU = Gandi Standard SSL, CN = empruntemontoutou.com
verify error:num=20:unable to get local issuer certificate
verify return:1
depth=0 OU = Domain Control Validated, OU = Gandi Standard SSL, CN = empruntemontoutou.com
verify error:num=21:unable to verify the first certificate
verify return:1
SSL_connect:SSLv3 read server certificate A
...