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?
> Would you announce a ``system is too busy'' or ``disk is
> full'' error as 500 just because it had persisted for
> longer than a threshold?
Yes. "I have been trying to deliver your message for 5 days, but I cannot
do so. Please return it to the sender. The most recent error I got was
'system is too busy'."
> If not, why is ``over quota'' any different?
It isn't. :-)
--
Philip Hazel University of Cambridge Computing Service
Get the Exim 4 book: http://www.uit.co.uk/exim-book
