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
