v3.1 configuration example

Postfix TLS baseline

Review and adapt this example to your topology, product version and security requirements.

smtpd_tls_cert_file = /etc/letsencrypt/live/mail.example.net/fullchain.pem
smtpd_tls_key_file = /etc/letsencrypt/live/mail.example.net/privkey.pem
smtpd_tls_security_level = may
smtp_tls_security_level = may
smtp_tls_loglevel = 1

Important: replace example addresses, credentials, hostnames and paths. Validate syntax before deployment.