Re: [DNSOP] new ANAME draft: draft-hunt-dnsop-aname-00.txt

Tony Finch <dot@dotat.at> Tue, 11 April 2017 19:15 UTC

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From: Tony Finch <dot@dotat.at>
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Date: Tue, 11 Apr 2017 20:15:43 +0100
Cc: Paul Wouters <paul@nohats.ca>, dnsop <dnsop@ietf.org>
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References: <20170407181139.GB66383@isc.org> <cc3bbc7a-3f48-2f7f-a3d9-3f752874fc00@redhat.com> <alpine.DEB.2.11.1704111641290.4393@grey.csi.cam.ac.uk> <alpine.LRH.2.20.999.1704111147390.8670@bofh.nohats.ca> <alpine.DEB.2.11.1704111928520.4393@grey.csi.cam.ac.uk> <763184bf-06ec-8320-07ff-9117b08cc509@redhat.com>
To: Florian Weimer <fweimer@redhat.com>
Archived-At: <https://mailarchive.ietf.org/arch/msg/dnsop/zowjRnloyu-qESPQqaftPDWvrwo>
Subject: Re: [DNSOP] new ANAME draft: draft-hunt-dnsop-aname-00.txt
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> On 11 Apr 2017, at 20:09, Florian Weimer <fweimer@redhat.com> wrote:
> 
>> On 04/11/2017 08:42 PM, Tony Finch wrote:
>> 
>> If you have a subdomain that needs to be a mail domain and a web site, you
>> need an MX pointing at your mail server and address records pointing at
>> your web server. You can't use a CNAME because they are usually different
>> servers.
> 
> That's not a problem, you can have MX records at the CNAME target.

That doesn't work if the web server is at 3rd party provider A but you want provider B's mail service not provider A's.

You might also have NAPTR records pointing at providers C and D.

Tony.
-- 
f.anthony.n.finch  <dot@dotat.at>  http://dotat.at