On Fri, Dec 09, 2011 at 07:47:08AM -0500, Wietse Venema wrote:
> lst_ho...@kwsoft.de:
> > I don't know the Postfix internals but if it where easy *and* safe to
> > implement it would have been done already from someone feeling the
> > need to do so.
>
> A quick search shows that trivial-rewrite server has no "fatal"
> errors - it reports all errors that it can detect to the client (in
> this case smtpd(8)).
However in the case of the queue manager, there is no reasonable
way to handle errors in recipient resolution other than moving the
entire message to the defer queue.
I am not sure that this is better than looping and retrying, since
the problem is almost certain to manifest itself for all transport
lookups and a blocked queue-manager may be just as good as a queue
manager that needlessly shunts mail back and forth between the
deferred and active queues.
A better design for most sites is to avoid unreliable sources for
transport decisions.
--
Viktor.
