whilst installing/configuring 2.1 to 3.2.x migration (using 2.1 main/master on 3.2 install), noticed these errors:
anything to worry about ? # grep 'TLS library problem' /var/log/maillog* /var/log/maillog:Dec 25 08:39:21 geko postfix/smtpd[9701]: warning: TLS library problem: error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol:s23_srvr.c:640: /var/log/maillog:Dec 25 08:39:24 geko postfix/smtpd[9701]: warning: TLS library problem: error:1408A10B:SSL routines:ssl3_get_client_hello:wrong version number:s3_srvr.c:977: /var/log/maillog-20171224:Dec 21 05:25:49 geko postfix/smtpd[20642]: warning: TLS library problem: error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol:s23_srvr.c:640: /var/log/maillog-20171224:Dec 21 05:25:54 geko postfix/smtpd[20642]: warning: TLS library problem: error:1408A10B:SSL routines:ssl3_get_client_hello:wrong version number:s3_srvr.c:977: # egrep '(error|fatal|panic):' /var/log/maillog Dec 25 08:39:21 geko postfix/smtpd[9701]: warning: TLS library problem: error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol:s23_srvr.c:640: Dec 25 08:39:24 geko postfix/smtpd[9701]: warning: TLS library problem: error:1408A10B:SSL routines:ssl3_get_client_hello:wrong version number:s3_srvr.c:977: egrep '(warning|error|fatal|panic):' /var/log/maillog returns many lines, seem mainly like this: Dec 26 11:56:52 geko postfix/smtpd[9572]: warning: hostname zg-1222a-130.stretchoid.com does not resolve to address 45.55.6.96: Name or service not known Dec 26 12:07:45 geko postfix/smtpd[9758]: warning: unknown[1.195.247.204]: SASL LOGIN authentication failed: UGFzc3dvcmQ6 Dec 26 12:07:54 geko postfix/smtpd[9758]: warning: unknown[1.195.247.204]: SASL LOGIN authentication failed: UGFzc3dvcmQ6 Dec 26 12:08:08 geko postfix/smtpd[9758]: warning: unknown[1.195.247.204]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
