openssl s_server -accept 11111 -key server.key -cert server.crt

wolfssl/debug/client.exe //with default config or -v [1-3]

the client tell me an error
"wolfSSL_connect error -326, record layer version error"
the openssl tell me

ACCEPT
ERROR
shutting down SSL
CONNECTION CLOSED

then I try to use foxmail with ssl smtp ,I recevied error 

SSL_accept error -311, unknown type in record hdr

when I use wolfSSL/debug/server.exe as a ssl server.
And recevied a good handshake when I use openssl s_server;

something different between wolfssl's ssl and openssl's ssl?