[dns-operations] Why would an MTA issue an ANY query instead of an MX query?

[Stephane Bortzmeyer]

On Sun, Jun 10, 2012 at 01:25:06PM +0200,
 DTNX Postmaster <postmaster at dtnx.net> wrote 
 a message of 37 lines which said:

> Google is known to be obsessed with latency, for example, so I
> wouldn't be suprised if they deliberately request ANY and then parse
> and cache the results for a multitude of uses.

But that's speculation. I checked the ANY requests coming into .FR
name servers and Google (which should be an important user) does not
appear.