Exam­ple of a connection: openssl s_client -connect $target:995 -crlf -quiet Issues The fol­low­ing mes­sage means that the serv­er and client could not agree on a shared cryp­to sys­tem; prob­a­bly because the server’s cryp­to is too old. 139763095926080:error:1425F102:SSL routines:ssl_choose_client_version:unsupported protocol:../ssl/statem/statem_lib.c:1957: Add TLS 1 support: openssl s_client -connect $target:995 -crlf -quiet -tls1