On 28/10/10 11:56, Tony Finch wrote:
On Thu, 28 Oct 2010, Gregory Machin wrote:
My question is why would "IN MX 10 mcvpemr01" and "IN MX
10 mcvpemr02" be repeated trough the zone file surely this is
redundant ?
Some hostmasters like to ensure that mail is not directed to hosts that do
not listen on SMTP. They prefer misdirected mail to be rejected
immediately rather than waiting days for the sending system to time out.
Some of my colleagues have this setup on the zones they manage
(eng.cam.ac.uk and cl.cam.ac.uk).
We historically did this, for the same reason. We abandoned it recently,
because it bloated our (already large) zone, and because the majority of
the inbound email for u...@host.domain.com was spam.
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