Thank you Wietse, 450 it is then.
Razvan Constantin -----Original Message----- From: owner-postfix-us...@postfix.org [mailto:owner-postfix-us...@postfix.org] On Behalf Of Wietse Venema Sent: Thursday, February 04, 2016 11:06 PM To: Postfix users Subject: Re: Change Temporary failure in name resolution response code 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
