out of place mx records.

[Barry Margolin]

In article <mailman.585.1288263412.555.bind-users at lists.isc.org>,
 Tony Finch <dot at dotat.at> 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).

But configuring MX records won't necessarily accomplish this.  It will 
cause mail for all these hosts to be delivered to mcvpemr01 or mcvpemr02.

-- 
Barry Margolin, barmar at alum.mit.edu
Arlington, MA
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