LCDUNG.

#smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
#smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
#smtpd_tls_cert_file=/etc/ssl/certs/dovecot.pem
#smtpd_tls_key_file=/etc/ssl/private/dovecot.pem
#smtpd_use_tls=yes
#smtpd_tls_auth_only = yes