> On Jan 24, 2018, at 9:25 PM, li...@lazygranch.com wrote: > > postfix/smtpd[14755]: warning: TLS library problem: error:140760FC:SSL > routines:SSL23_GET_CLIENT_HELLO:unknown protocol:s23_srvr.c:640: > > Should I be blocking some encryption method? I thought openssl dropped > support for the hackable protocols.
The error message is not what it appears. The SSLv23 functions are the generic layer that handles all protocol versions before the actual protocol is determined. -- Viktor.