On Thu, May 04, 2006 at 07:39:44PM -0400, Terry Fielder wrote:
Sorry, no. The whole point of putting the IP in the SPF record is that
prior to the cutover to redundant connection the IP is a match, so you
never do a DNS lookup on the A record (you return SPF pass or whatever
For mail that is going to PASS, and for implementations that do
not prefetch, true.
But SPF was designed to combat forgery so I think I am not way off
base to assume I actually do need to fetch those A records as the
ip4 mechanism did not match. Once those A records are in my cache,
the domain has a problem as those A records point to the original
(now severed) link.
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