Question mail send problem

[Gökhan Çvdar]

HI! when I send mail
I have this problem I dont understand only 1 domain take this problem everyone take my mail ........com domain dont take
Mar 5 05:35:17 ns3 qmail: 1520217317.630242 delivery 1059: deferral: TLS_connect_failed:_error:140770FC:SSL_routines:SSL23_GET_SERVER_HELLO:unknown_protocol;_connected_to