[dns-operations] Reporting glue as authoritive data -- Bug!

Paul Vixie paul at vix.com
Fri Jan 25 19:56:38 UTC 2008

> > QTYPE=ANY is so poorly specified and so widely misimplemented that
> > you can't use it in normal operations, it is, at best, a diagnostic
> > tool (a weak one).
> Sendmail used QTYPE=ANY to retrieve A and AAAA records in one query.
> I guess quite a few mail servers still do this, so it should better
> work, at least to some degree.

sendmail falls back to QTYPE=MX when it doesn't work, which is mostly.

> But then, Sendmail seems to fail to properly sort MX records by
> priority in some cases.  Oh well.


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