smtpd_sasl_path = private/auth
smtpd_tls_cert_file=/etc/ssl/certs/postfix.crt
smtpd_tls_key_file=/etc/ssl/private/postfix.key
-smtpd_use_tls = no
+smtpd_use_tls = yes
smtpd_tls_auth_only = yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache