Postfix gives a few minor errors which can be easily fixed.

  warning: database /etc/postfix/relay_domains.db is older than source file /etc/postfix/relay_domains
  warning: database /etc/postfix/transport.db is older than source file /etc/postfix/transport
  warning: database /etc/postfix/sender_rules.db is older than source file /etc/postfix/sender_rules
  warning: database /etc/postfix/recipient_rules.db is older than source file /etc/postfix/recipient_rules

These errors can be fixed with the following commands.

  postmap /etc/postfix/transport
  postmap /etc/postfix/relay_domains
  postmap /etc/postfix/sender_rules
  postmap /etc/postfix/recipient_rules

After that a restartsmtpscan.py to reload postfix.