# Conservative baseline — review before use
myhostname = mail.example.com
mydomain = example.com
myorigin = $mydomain
inet_interfaces = all
inet_protocols = ipv4
mydestination = $myhostname, localhost.$mydomain, localhost
mynetworks = 127.0.0.0/8, [::1]/128
smtpd_relay_restrictions = permit_mynetworks,permit_sasl_authenticated,defer_unauth_destination
smtp_tls_security_level = may
smtpd_tls_security_level = may