user = {{ DBUSER }}
password = {{ DBPASS }}
hosts = unix:/var/run/mysqld/mysqld.sock
dbname = {{ DBNAME }}
query = SELECT IF(EXISTS(SELECT address, domain FROM alias
      WHERE address = '%s'
        AND domain IN (
          SELECT domain FROM domain
            WHERE backupmx = '1'
              AND relay_all_recipients = '1'
              AND relay_unknown_only = '1')

      ), 'lmtp:inet:dovecot:24', NULL) AS 'transport'