Some Logs
Jul 8 12:05:22 server postfix/smtps/smtpd[22036]: warning: Both smtpd_tls_chain_files and one or more of the legacy smtpd_tls_cert_file, smtpd_tls_eccert_file or smtpd_tls_dcert_file are non-empty; the legacy parameters will be ignored
Jul 8 12:05:22 server postfix/smtps/smtpd[22036]: warning: database /etc/postfix/vmail_ssl.map.db is older than source file /etc/postfix/vmail_ssl.map
Jul 8 12:05:22 server postfix/smtps/smtpd[22036]: warning: error opening chain file: /etc/ssl/private/ssl-cert-snakeoil.key: No such file or directory
Jul 8 12:05:22 server postfix/smtps/smtpd[22036]: warning: hostname my_ip.hosted.at.cloudsouth.com does not resolve to address my_ip
Jul 8 12:05:22 server postfix/smtps/smtpd[22036]: connect from unknown[my_ip]
Jul 8 12:05:22 server postfix/smtps/smtpd[22036]: TLS SNI mydomain.com from unknown[my_ip] not matched, using default chain
Jul 8 12:05:22 server postfix/smtps/smtpd[22036]: SSL_accept error from unknown[my_ip]: -1
Jul 8 12:05:22 server postfix/smtps/smtpd[22036]: warning: TLS library problem: error:0A000076:SSL routines::no suitable signature algorithm:../ssl/t1_lib.c:3220:
Jul 8 12:05:22 server postfix/smtps/smtpd[22036]: lost connection after CONNECT from unknown[my_ip]
Jul 8 12:05:22 server postfix/smtps/smtpd[22036]: disconnect from unknown[my_ip] commands=0/0