Charlie Orford:
> I will run the tests and get the output for you later tonight but my suspicion
> is that there was likely nothing wrong with the address cache, just that
> a lot of addresses had never been probed by the secondary mx as the
> primary mx is up virtually 99.9% of the time.
In that case, a hypothetical "tempfail_action = permit" would be
99.9% identical to setting up a backup MX without any recipient
validation and refusing all mail as long as the primary MX reponds.
If there's something missing in Postfix, them that is what should
be added (refusing mail if the primary responds).
Wietse
