On Tue, 24 Feb 2004, Alan J. Flavell wrote:
> But irrespective of which way that decision falls, I do have this gut
> feeling that the qualify_single setting should be ignored in the
> second stage of the lookup, as I said above.
Yes, that sounds plausible. But there is a potential catch...
When a resolver is called to find MX records, it often returns the A
records in the same return packet, if it happens to have them available.
In that situation, there isn't a second stage lookup.
Now, I don't know what "have them available" actually means in practice.
If it means "look for them in this nameserver", and it still uses the
qualify_single thingy, then you are no better off.
You should be able to detect whether this is the case by running a test
with DNS debugging turned on. The resolver's debugging output will show
how many times it was called.
--
Philip Hazel University of Cambridge Computing Service,
ph10@??? Cambridge, England. Phone: +44 1223 334714.
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