Sendmail: host name lookup failure

[Chuck Swiger]

Paul A. Hoadley wrote:
[ ... ]
>>Dec 16 11:19:08 bert sendmail[1043]: iBF403Wb004664:
>>to=<marc at coremedicalsolutions.com>,<paul at coremedicalsolutions.com>,<rohan at coremedicalsolutions.com>,
>>ctladdr=<paulh at bert.coremedicalsolutions.com> (1001/1001),
>>delay=20:49:05, xdelay=00:00:00, mailer=esmtp, pri=4770661,
>>relay=tsb.coremedicalsolutions.com., dsn=4.0.0, stat=Deferred: Name
>>server: tsb.coremedicalsolutions.com.: host name lookup failure
> 
> I remain stumped here.  The sending host, the LAN's DNS server and the
> LAN's mail hub all have forward and reverse DNS entries.  It's not at
> all clear to me what sendmail is complaining about.

That hostname gets an NXDOMAIN failure from here:

53-sec% dig tsb.coremedicalsolutions.com.
; <<>> DiG 8.3 <<>> tsb.coremedicalsolutions.com
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 36321
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUERY SECTION:
;;      tsb.coremedicalsolutions.com, type = A, class = IN

;; AUTHORITY SECTION:
coremedicalsolutions.com.  3H IN SOA  ns.chariot.net.au. 
hostmaster.chariot.net.au. (
                                         2002060603      ; serial
                                         3H              ; refresh
                                         1H              ; retry
                                         1W              ; expiry
                                         1D )            ; minimum

-- 
-Chuck