Openssl command s_client always says 400 Bad Request

I am trying to test a server that is working normal in web browser, with openssl s_client option, connecting it directly using openssl returns the 400 Bad Request: openssl s_client -servername example.com -connect example.com:443 -tls1 (some information about the certificate) GET / HTTP/1.1 (and the error occurs **immediately** - no time to include more headers like Host:) Important: I already tried to put the Host: header, the thing is that when i run GET, the error occur immediately leaving me no chance to include more headers. Replace example.com with my host...