getting not authoritative with some notifies - Solved
carl at byington.org
Mon Aug 1 01:00:39 UTC 2016
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On Sat, 2016-07-30 at 21:40 +0200, Matus UHLAR - fantomas wrote:
> or simply wait till customers complain and tell them they should tell
> you when tthey migrated their zones off.
Which customers will complain?
Consider the case where you have customer A and ex-customer B, and you
still have ex-customer B zones loaded in your master dns servers. The
rest of the world properly sees the (new) zone content for ex-customer
But when your existing customer A tries to send mail to ex-customer B,
it may go to the wrong place or bounce. And that will only happen for
your *other* customers. B thinks everything is ok, since they can
receive mail from gmail, etc.
To properly serve your customers like A, you need to purge B's zones
soon after they move, whether they notify you or not.
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