I have almost same logs. Some time ago I asked people on this mailing list. They said that somebody tries to connect to your server but he can't because of too old ssl he uses. You can ignore it.
2018-04-27 8:22 GMT+02:00 Dominic Raferd <domi...@timedicer.co.uk>: > I have always received a number of warning messages (from > postfix/smtpd) stating 'TLS library problem' in my mail logs and I > think they are always followed by a dropped incoming connection. I > have hitherto assumed that they reflect a badly-configured (probably > spamming) foreign client/host, but the messages could be read as > implying an internal problem on my mailserver. Which is true? > > The details of the reported error messages over the recent period can > be summarised thus: > > $ grep -a "warning: TLS library problem" /var/log/mail.log.1 > /var/log/mail.log|grep -o "error:.*"|sort|uniq -c|sort -nr > 12 error:1408F10B:SSL routines:SSL3_GET_RECORD:wrong version > number:s3_pkt.c:362: > 11 error:1408A10B:SSL routines:ssl3_get_client_hello:wrong > version number:s3_srvr.c:960: > 10 error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown > protocol:s23_srvr.c:640: > 2 error:1408A0E3:SSL routines:ssl3_get_client_hello:parse > tlsext:s3_srvr.c:1239: > > Should I be concerned about these messages? > -- *Pozdrawiam / Best Regards* *Piotr Bracha*
