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From: he@spurv.runit.sintef.no (Havard Eidnes)
Newsgroups: comp.protocols.tcp-ip.domains
Subject: No matching of * MX records?
Keywords: MX wildcards
Message-ID: <1990Nov16.232833.7684@ugle.unit.no>
Date: 16 Nov 90 23:28:33 GMT
Sender: news@ugle.unit.no
Organization: Computing Center at the University of Trondheim, Norway
Lines: 66

In one of my primary zone files, I have:

$ORIGIN imf.unit.no.
; ...
; (SOA and NS records omitted)
; MX information:
;
@               IN      MX      10      snork.imf.unit.no.
*               IN      MX      10      snork.imf.unit.no.
; ...
hufsa           IN      A       129.241.15.4
                IN      HINFO   APOLLO-DSP10010 UNIX

Previously, when I looked up MX information for hufsa.imf.unit.no.,
I would receive the information that snork.imf.unit.no. was a mail
exchanger for hufsa.imf.unit.no. However, recently this seems to
have stopped working, and I have to explicitly ask for the mail exchanger
of '*.imf.unit.no' instead. (All name lookups tried with nslookup -- see
attached trace of nslookup session.) It may (or may not) be related that
I recently installed BIND 4.8.3 on the primary name server for imf.unit.no.

Is this correct behaviour?

If this is incorrect behaviour, I would appreciate any hints on what 
might be wrong with my setup.

- Havard

----------------------- nslookup trace

% nslookup
Default Server:  runix.runit.sintef.no
Address:  129.241.1.5

> set q=mx
> set debug
> set d2
> hufsa.imf.unit.no.
Server:  runix.runit.sintef.no
Address:  129.241.1.5

res_mkquery(0, hufsa.imf.unit.no, 1, 15)
------------
SendRequest(), len 35
    HEADER:
        opcode = QUERY, id = 2, rcode = NOERROR
        header flags:  query, want recursion
        questions = 1,  answers = 0,  auth. records = 0,  additional = 0

    QUESTIONS:
        hufsa.imf.unit.no, type = MX, class = IN

------------
------------
Got answer (35 bytes):
    HEADER:
        opcode = QUERY, id = 2, rcode = NOERROR
        header flags:  response, auth. answer, want recursion, recursion avail.
        questions = 1,  answers = 0,  auth. records = 0,  additional = 0

    QUESTIONS:
        hufsa.imf.unit.no, type = MX, class = IN

------------
*** No mail exchanger information is available for hufsa.imf.unit.no.
>