🚀 go-pugleaf

A question to the gurus:
How does MX in combination with CMU-TeK lookup Names/Adresses?

I find a Message from a user not deliverd to its destination due
to an unknown address. Checking the ip-address with the CMU
namesserver gives no answer. Using M.Madison's NSQUERY, I find
that the main nameserver is not running, the secondary
gives an answer, stating that mail should be sent via onther host
My question: whom does MX ask for nameresolution to put in the correct
address?

Here a copy of my session:

%PHOTO-I-STARTED, PHOTO V1.0-003, recording started 10-NOV-1992 15:04:31
PIB3_$ mailq
Entry: 9684, Origin: [Local] <maur@PIB1.physik.uni-bonn.de>
  Status: IN-PROGRESS
  SMTP entry #9686, status: READY
      Waiting for retry until: 10-NOV-1992 15:14:17.73
      Recipient #1: <hurth@physik.unizh.ch>, Route=physik.unizh.ch
      DNS errors=6
      Last error: %MX-F-NOHOST, no such host

PIB3_$ipncp
IPNCP> hostnam physik.unizh.ch
%IPACP-E-DSNOADDR, Domain service: no addresses found for host name
Host 'PHYSIK.UNIZH.CH' Full Name = ''

%IPACP-E-DSNAMERR, Domain service: name error (no such name)
IPNCP> CRTL-Z
PIB3_$ Type sys$manager:namres.config
; NAMRES.CONFIG
;
;       DOMAIN_ERVER:domain:servername:address:port
Domain_Server:.:NIC.RHRZ.Uni-Bonn.de.:131.220.16.220:53
Domain_Server:.:work1.rhrz.uni-bonn.de.:131.220.16.10:53
;
PIB3_$ nsquery physik.unizh.ch NIC.RHRZ.Uni-Bonn.de.

%NSQUERY-I-TRYNS, trying address 131.220.16.220...
%NSQUERY-E-NSOPNERR, error opening connection to name server
-SYSTEM-F-TIMEOUT, device timeout
%NSQUERY-F-NOCONTACT, name server could not be contacted
PIB3_$  nsquery physik.unizh.ch WORK1.RHRZ.Uni-Bonn.de.

%NSQUERY-I-TRYNS, trying address 131.220.16.10...
%NSQUERY-I-QUERYOK, query operation completed successfully

QUERY  #1: QName=PHYSIK.UNIZH.CH., QType=255, QClass=1

ANSWER #1: PHYSIK.UNIZH.CH., NS, INTERNET,    0 01:09:58, NS=forty2.physik.unizh
.ch.
ANSWER #2: PHYSIK.UNIZH.CH., NS, INTERNET,    0 01:09:58, NS=caprice.physik.uniz
h.ch.
ANSWER #3: PHYSIK.UNIZH.CH., NS, INTERNET,    0 01:09:58, NS=lasersun.physik.uni
zh.ch.
ANSWER #4: PHYSIK.UNIZH.CH., SOA, INTERNET,    0 23:56:54
    Primary NS: forty2.physik.unizh.ch.
    Responsible: postmaster.forty2.physik.unizh.ch.
    Serial=39, Refresh=   0 01:00:00, Retry=   0 00:10:00
    Expire=  41 16:00:00, Minimum=   1 00:00:00
ANSWER #5: PHYSIK.UNIZH.CH., MX, INTERNET,    0 01:10:15, Pref=5, Exch=forty2.ph
ysik.unizh.ch.

AUTHOR #1: physik.UNIZH.CH., NS, INTERNET,    0 01:09:58, NS=forty2.physik.unizh
.ch.
AUTHOR #2: physik.UNIZH.CH., NS, INTERNET,    0 01:09:58, NS=caprice.physik.uniz
h.ch.
AUTHOR #3: physik.UNIZH.CH., NS, INTERNET,    0 01:09:58, NS=lasersun.physik.uni
zh.ch.

ADDTNL #1: forty2.physik.unizh.ch., A, INTERNET,    0 01:10:15, Addr=130.60.160.
4
ADDTNL #2: caprice.physik.unizh.ch., A, INTERNET,    0 01:09:58, Addr=130.60.80.
12
ADDTNL #3: lasersun.physik.unizh.ch., A, INTERNET,    0 01:09:58, Addr=130.60.80
.20

Thanks

Peter
=====================================================================
Peter Kobe                      Internet: system@pib1.physik.uni-bonn.de
Physikalisches Institut           HEPNET: 13562::SYSTEM
Universitaet Bonn                    Tel: (49) 228 73 3222
D 53 Bonn                            FAX: (49) 228 73 7869
Nussallee 12