[120314] in North American Network Operators' Group
Re: DNS question, null MX records
daemon@ATHENA.MIT.EDU (Tony Finch)
Wed Dec 16 07:00:10 2009
Date: Wed, 16 Dec 2009 11:59:18 +0000
From: Tony Finch <dot@dotat.at>
To: Mark Andrews <marka@isc.org>
In-Reply-To: <200912160258.nBG2wuPa051641@drugs.dv.isc.org>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Wed, 16 Dec 2009, Mark Andrews wrote:
> Douglas Otis wrote:
> >
> > One might instead consider using:
> >
> > example.com. IN MX 0 192.0.2.0
> > IN MX 10 192.0.2.1
> > ...
> > IN MX 90 192.0.2.9
>
> Which will expand to:
>
> example.com. IN MX 0 192.0.2.0.example.com.
> IN MX 10 192.0.2.1.example.com.
> ....
> IN MX 90 192.0.2.9.example.com.
>
> MX records DO NOT take IP addresses.
Or if he puts in the trailing dot it'll still cause the root server
traffic he was trying to avoid.
Tony.
--
f.anthony.n.finch <dot@dotat.at> http://dotat.at/
GERMAN BIGHT HUMBER: SOUTHWEST 5 TO 7. MODERATE OR ROUGH. SQUALLY SHOWERS.
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