Mark Goodge:
> Wietse Venema wrote:
> > Mark Goodge:
> >>
> >> The cache has two main functions:
> >>
> >> 1. To reduce traffic between the gateway and destination server, and 
> >> reduce load on both.
> >>
> >> 2. To allow the gateway server to correctly handle mail 
> >> acceptance/rejection when the destination server is unreachable.
> > 
> > If the cache is good enough for 2) then it makes no sense to
> > skip the cache for 1).
> 
> It would if even the short lag for cached failures (or, for that matter, 
> cached successes) to expire is unacceptable. A typical example might be 

If the cache is NOT good enough for 1) then it is NOT good enough
for 2), either. Therefore do NOT use the cache.

        Wietse

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