On Mon, Jul 13, 2009 at 06:58:28PM -0400, Wietse Venema wrote: > Keld Jørn Simonsen: > > Is there a way to disambiguate between DNS timeouts and DNS errors, > > and discard the latter? > > Postfix is only the messenger of the bad news. When the server > responds, Postfix acts accordingly. When the server does not > reply, Postfix assumes that this is a temporary error, because > assuming otherwise would cause a lot of mail to fail.
Yes, but there are two types of bad news: one is that we do not know if everything is fine, timeout, and the other that we positively know something is wrong. I understand that in both cases postfix gives a 450 code, and that there is no way in postfix to change this code. Is that so? Best regards keld
