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Re: MX dot was (Re: [ietf-dkim] TXT wildcards SSP issues

2007-06-07 08:46:25

On Jun 7, 2007, at 1:34 AM, Hector Santos wrote:

Steve Atkins wrote:

This is a single lookup by the client, no traversal,
>> no loop, required.
Your reasoning is unclear to me.
Given the domain a.b.c.d.e.f.g.h.i.j.k.foo, please explain what
single DNS query you would make and what answer you would
expect to receive.

The single DNS query syntax would be:

    a.b.c.d.e.f.g.h.i.j.k._ssp.foo

The result will depend on what this organization is going to define for policies at each level.

No. You're simply displaying a lack of understanding of DNS.

There is no conceivable way that can work in general.

By your reasoning, if presented with the hostname
sales.demon.co.uk you would query for sales.demon.co._ssp.uk.

That won't work. At all.

Please, before making assertions about how DNS resolution
should work, think about the basics of how DNS actually works.

Cheers,
  Steve

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