smtpd_sasl_auth_enable = yes
smtpd_sasl_type = dovecot
smtpd_sasl_local_domain = $myhostname
smtpd_sasl_security_options = noanonymous
smtpd_sasl_path = private/auth
broken_sasl_auth_clients = yes
smtpd_sasl_authenticated_header = yes