reverse dns configuration for IPV4, IPV6+ dns+ mail ?

Matus UHLAR - fantomas uhlar at
Sun Jun 18 15:38:32 UTC 2017

On 18.06.17 16:26, Mark Elkins wrote:
>Put two reverse records in both  the IPv4 and IPv6 reverse zones....
>in the "" zone:
>126   IN   PTR
>126   IN   PTR

while this is possible, it's not always a good idea.
One reverse record is enough in most cases you need reverse DNS.
(which mostly means, for outgoing mail)

>Nothing wrong with a machine (or interface on a machine) having more
>than one name for the same address. List them all in the reverse
>configuration. After all, a NS record usually has at least two records ;-)

there are cases when having two reverse records is misleading.

Matus UHLAR - fantomas, uhlar at ;
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