DNS question, null MX records

Joe Abley jabley at hopcount.ca
Wed Dec 16 05:20:14 CST 2009

On 2009-12-15, at 19:09, Tony Finch wrote:

> On Tue, 15 Dec 2009, Florian Weimer wrote:
>> * Eric J. Esslinger:
>>> I found a reference to a null MX proposal, constructed so:
>>> example.com    IN    MX 0 .
>> I think this is quite controversal.
> My impression from discussions on various IETF lists is that most people
> think it is a good idea, it is already reasonably widely implemented, but
> no-one has the time and persistence to push a spec through to publication.

When I attempted to document a similar idea (using an empty label in the MNAME field of an SOA record in order to avoid unwanted DNS UPDATE traffic) the consensus of the room was that the idea was both controversial and bad :-)



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