TLS library problem reported in logs; normal?

jonathanbrickman0000

Log snippet, just now, everything up to date. Is this normal? I have seen it happen with a variety of different servers, not just Amazon AWS.

postfix-mailcow-1  | Mar 19 17:01:28 b337686ca9e3 postfix/smtps/smtpd[441]: connect from ec2-44-220-188-183.compute-1.amazonaws.com[44.220.188.183]
postfix-mailcow-1  | Mar 19 17:01:28 b337686ca9e3 postfix/smtps/smtpd[441]: SSL_accept error from ec2-44-220-188-183.compute-1.amazonaws.com[44.220.188.183]: -1
postfix-mailcow-1  | Mar 19 17:01:28 b337686ca9e3 postfix/smtps/smtpd[441]: warning: TLS library problem: error:0A00010B:SSL routines::wrong version number:../ssl/record/ssl3_record.c:354:

Cisco30

https://community.mailcow.email/d/1282-ssl-connect-tls-library-fetchmail-to-mailcow
https://community.mailcow.email/d/3263-tls-handshaking-wrong-version-number
https://community.mailcow.email/d/4093-smtp-from-other-docker-to-mailcow-dockerized-on-the-same-host
https://forum.gitlab.com/t/cant-send-mails-per-smtp-cause-of-wrong-version-number/115008