DNS question, null MX records
Douglas Otis
dotis at mail-abuse.org
Thu Dec 17 00:02:56 UTC 2009
On 12/16/09 3:59 AM, Tony Finch wrote:
> 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.
Sorry for embarrassing mistake.
To avoid server access and hitting roots:
host-1.example.com. IN A 192.0.2.0
...
host-10.example.com. IN A 192.0.2.9
example.com. IN MX 0 host-1.example.com.
...
example.com. IN MX 90 host-10.example.com.
-Doug
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