...... Original Message .......
On Sat, 13 Aug 2005 08:18:19 +0200 Ralf Doeblitz
<list+spf-discuss(_at_)doeblitz(_dot_)net> wrote:
--On Freitag, August 12, 2005 15:03:04 -0400 Scott Kitterman
<spf2(_at_)kitterman(_dot_)com> wrote:
[...]
But then, what if it really *is* a temporary error, and their
DNS server was just down at the moment.
If they answer you on one rr, but not the other, the server isn't down.
Usually you ask your own forwarding (and caching) DNS server about the
RRs.
If that server has one RR still cached but can not reach the authoritative
server for the domain, you will get cached answers to some queries and
timeouts to everything not in your DNS servers cache.
Yes, but as long as your cache honors TTL, you've got a valid sender policy
that it's reasonable to go with. I think that's OK.
Scott K