smtpd_sender_restrictions =
    reject_sender_login_mismatch,
    permit_sasl_authenticated,
    permit

table = domain
query = SELECT username AS allowedUser FROM mailbox WHERE username="%s" AND deleted_at IS NULL
UNION SELECT goto FROM alias WHERE address="%s" AND active = 1
UNION select 'admin' from domain where domain = '%d'

smtpd_sender_restrictions =
    reject_sender_login_mismatch,
    permit_sasl_authenticated,
    check_sender_access proxy:mysql:$config_directory/mysql_reject_virtual_domains.cf,
    permit

table = domain
query = select 'Reject 530 SMTP authentication is required' from domain where domain = '%d'

smtpd_sender_restrictions =
    reject_sender_login_mismatch,
    permit_sasl_authenticated
    reject_unlisted_sender,
    permit

virtual_sender_mailbox_maps.cf

query = SELECT '%s' AS email FROM domains WHERE name='%d' AND active=TRUE

main.cf

smtpd_sender_login_maps = ${proxysql}virtual_sender_mailbox_maps.cf
smtpd_sender_restrictions =
    reject_sender_login_mismatch,
    permit_sasl_authenticated,
    permit