Mailserver ssl error

Hey, my caberpanel installation was running now 1 week and now i running into mailserver issues, this caberpanel seems for me realy unstable.

[000.413] STARTTLS command works on this server
[000.506] Cannot convert to SSL (reason: SSL connect attempt failed error:14094438:SSL routines:ssl3_read_bytes:tlsv1 alert internal error)
[000.506] Note: This same test with Format set to “Debug” may show more

here is the part of the mail.log

Feb 10 02:28:47 server1 postfix/smtpd[33489]: connect from ssl-tools.net[185.55.116.145]
Feb 10 02:28:47 server1 postfix/smtpd[33489]: warning: table hash:/etc/postfix/vmail_ssl.map.db: key mail.matthes.tv: malformed BASE64 value: /etc/letsencrypt/live/mail.mat
Feb 10 02:28:47 server1 postfix/smtpd[33489]: warning: tls_server_sni_maps: mail.matthes.tv map lookup problem
Feb 10 02:28:47 server1 postfix/smtpd[33489]: SSL_accept error from ssl-tools.net[185.55.116.145]: -1
Feb 10 02:28:47 server1 postfix/smtpd[33489]: warning: TLS library problem: error:1422E0EA:SSL routines:final_server_name:callback failed:…/ssl/statem/extensions.c:1006:
Feb 10 02:28:47 server1 postfix/smtpd[33489]: lost connection after STARTTLS from ssl-tools.net[185.55.116.145]
Feb 10 02:28:47 server1 postfix/smtpd[33489]: disconnect from ssl-tools.net[185.55.116.145] ehlo=1 starttls=0/1 commands=1/2

Strange now this error is gone but If i do SSL check on postfix i get Always self signed certificate from example.com, but Mail.xxxxx Domain has a valid SSL certificate and it’s also maped in virtual_ssl.map so why postfix is Not using it?