BIND 9 Breaks MX resolution?

[James Raftery]

On Mon, Jun 18, 2001 at 09:52:06AM -0400, Brian (Vond) Maloney wrote:
> When I upgrade, MX records for major sites like hotmail and
> aol don't get returned until I specifically ask for them once - so mail from
> my site to those sites bounces.

You have mail software that doesn't make MX queries? And you think your
DNS server is broken?

> Does anyone have any ideas?  Thanks in advance.
> Here is an example using host - note that the first "host -a" returns no MX
> records, but after looking for them specifically, it does:

You have misunderstood the query type you're using. The "ANY" query is for
ANY record the cache has, not EVERY record that exists with a given
owner name (how could the cache know what record types exist at a given
point to query for them?)

You asked your cache for ANY RRs with an owner of hotmail.com. That's
what it returned to you. When you queried for the MX RRset it looked
that up and cached it. When you sent another ANY query, the cache knew
more than it did the first time and so could give you more information.

james
-- 
James Raftery (JBR54)
  "It's somewhere in the Red Hat district"  --  A network engineer's
   freudian slip when talking about Amsterdam's nightlife at RIPE 38.