Robert Schetterer:
warning: TLS library problem: error:1409442E:SSL
routines:SSL3_READ_BYTES:tlsv1 alert protocol version:s3_pkt.c:1099:SSL
alert number 70:
your smtpd do not support TLS1.1/1.2 so you cannot disable it's usage.
But you cannot avoid other smtp clients trying to speek to you that
protocol version.
These sessions will fail and it's up to the client to retry a lower
protocol version.
At least postfix-2.11 in this client role does handle this situation
very well.
am i right ?
yes
Best practice ignore warning ?
yes too.
you may find host unable to send to you because they try/have only a
higher protocol version.
But these should fallback to plaintext anyway.
Andreas