Hello, as from here I can configure "Require sender email domains" to enforce TLS negotiation ( whitelisting ). Beside this I can configure "Skip TLS negotiation" ( blacklisting ). For compliance and legal reason I need to configure TLS negotiation…

Is the firewall (MTA mode) not accepting SMTP with SSL/TLS also on port 465/587? My Epson printer is not able to connect on 465/587 with the firewall: /log/smtpd_main.log -> nothing in log /log/smtpd_reject.log -> nothing in log ACL violation? Source…