Thanks Wietse, Thats the answer i was looking for - wil upgrade today.
>>> Wietse Venema <wie...@porcupine.org> 17/11/09 00:18:48 >>> Postfix versions 2.3 and later skip a DNS record with a bad name. Unsupported Postfix versions pretend that the lookup failed when the result is invalid. Wietse