smtpd_sender_restrictions =
        permit_mynetworks,
        reject_non_fqdn_sender,
        reject_unknown_sender_domain,
        reject_sender_login_mismatch,
        reject_unlisted_sender,
        permit

smtpd_recipient_restrictions =
        permit_sasl_authenticated,
        reject_non_fqdn_recipient,
        reject_unknown_recipient_domain,
        reject_unauth_destination,
        reject_unlisted_recipient,

smtpd_data_restrictions =
        reject_unauth_pipelining,
        permit