user = {{ .Env.MYSQL_USER }}
password = {{ .Env.MYSQL_PASSWORD }}
hosts = {{ .Env.MYSQL_HOST }}
dbname = {{ .Env.MYSQL_DATABASE }}
query = SELECT IF(send_only = true, 'REJECT', 'OK') AS access FROM mail_users JOIN mail_domains ON mail_users.domain_id = mail_domains.id WHERE mail_users.name = '%u' AND mail_domains.name = '%d'