Re: [exim] Retry on 550 errors

On Wed, Dec 06, 2006 at 12:35:33PM +0000, Philip Hazel wrote:
> On Wed, 6 Dec 2006, Chris Lightfoot wrote:
>
> > > ALL temporary errors become permanent if they persist for long enough.
> > > That's what timeouts are all about. Messages get bounced when servers
> > > are down for sufficiently long. I don't see why over quota errors are
> > > any different.
> >
> > Of course, but that's up to the sender not the receiver.
>
> Who is "the sender" when a message passes through several MTAs? Are you
> saying that only the originating MTA is allowed to apply timeouts?

I was considering the case of the system which is
attempting final delivery detecting an over-quota
condition and reporting it to a connected MTA as a
permanent failure, rather than that of the connected MTA
having seen 4xx errors continuously for a long time and
reporting a 5xx quoting the text of the error. The latter
is obviously behaving sensibly.

--
``The reasonable man adapts himself to the world: the unreasonable one
persists in trying to adapt the world to himself. Therefore all progress
depends on the unreasonable man.'' (George Bernard Shaw)