Inteq Solution - Dep. Tehnic: > "The unknown_client_reject_code parameter specifies the response code for > rejected requests (default: 450). The reply is always 450 in case the > address->name or name->address lookup failed due to a temporary problem." > > But is there a way to change this behaviour to 550/554?
No. You would lose mail whenever DNS times out, and that would be worse than having some client retry repeatedly. Unless you are running Postfix in a very limited environment, repeated retries from one system should not be a problem. > This situation is not exactly temporary and it is happening for over a > month. I could just forget about it, but this server's retry is very very > low. Postfix considers timeouts as a temporary error. Handling them as a hard error would do more harm than good. But I repeat myself. Wietse