MX doesn't resolve if not helped a bit...
Mark.Andrews at nominum.com
Mark.Andrews at nominum.com
Tue May 29 02:23:07 UTC 2001
Before trying to chase this down fix the delegation problem.
Mark
Doc-2.1.2: doc -p cogito-info.com
Doc-2.1.2: Starting test of cogito-info.com. parent is com.
Doc-2.1.2: Test date - Tue May 29 12:19:07 EST 2001
Note: Skipping parent domain testing
Found 2 NS and 0 glue records for cogito-info.com. @a.gtld-servers.net. (non-AUTH)
Using NSlist from parent domain server a.gtld-servers.net.
NS list summary for cogito-info.com. from parent (com.) servers
== ns1.cogito-info.ch. ns2.cogito-info.ch.
soa @ns1.cogito-info.ch. for cogito-info.com. serial: 9
soa @ns2.cogito-info.ch. for cogito-info.com. serial: 9
SOA serial #'s agree for cogito-info.com.
Authoritative domain (cogito-info.com.) servers agree on NS for cogito-info.com.
ERROR: NS list from cogito-info.com. authoritative servers does not
=== match NS list from parent (com.) servers
NS list summary for cogito-info.com. from authoritative servers
== cogito-ns1.labourey.com. cogito-ns2.labourey.com.
ERROR: ns1.cogito-info.ch. claims to be authoritative, but does not appear in
NS list from authoritative servers
ERROR: ns2.cogito-info.ch. claims to be authoritative, but does not appear in
NS list from authoritative servers
Checking 0 potential addresses for hosts at cogito-info.com.
==
Summary:
ERRORS found for cogito-info.com. (count: 3)
Done testing cogito-info.com. Tue May 29 12:19:10 EST 2001
######## Query Log ########
## Nameservers for com. (dig ns com.):
a.gtld-servers.net.
b.gtld-servers.net.
c.gtld-servers.net.
d.gtld-servers.net.
e.gtld-servers.net.
f.gtld-servers.net.
g.gtld-servers.net.
i.gtld-servers.net.
j.gtld-servers.net.
k.gtld-servers.net.
l.gtld-servers.net.
m.gtld-servers.net.
===================
## NS records for cogito-info.com. domain from nameserver a.gtld-servers.net.
; (1 server found)
;; res options: init defnam dnsrch
;; got answer:
; flags: qr; query: 1, answer: 2, authority: 0, additional: 0
;; answer section:
cogito-info.com. 2d in ns ns1.cogito-info.ch.
cogito-info.com. 2d in ns ns2.cogito-info.ch.
===================
## SOA record for cogito-info.com. domain from nameserver ns1.cogito-info.ch.
; (1 server found)
; flags: qr aa ra
cogito-info.com. 1d in soa cogito-ns1.labourey.com. webmaster.cogito-info.ch. (
9 ; serial
3h ; refresh
1h ; retry
1w ; expiry
1d ) ; minimum
===================
## SOA record for cogito-info.com. domain from nameserver ns2.cogito-info.ch.
; (1 server found)
; flags: qr aa ra
cogito-info.com. 1d in soa cogito-ns1.labourey.com. webmaster.cogito-info.ch. (
9 ; serial
3h ; refresh
1h ; retry
1w ; expiry
1d ) ; minimum
===================
## NS records for cogito-info.com. domain from nameserver ns1.cogito-info.ch.
; (1 server found)
;; res options: init defnam dnsrch
;; got answer:
; flags: qr aa ra; query: 1, answer: 2, authority: 0, additional: 1
;; answer section:
cogito-info.com. 1d in ns cogito-ns2.labourey.com.
cogito-info.com. 1d in ns cogito-ns1.labourey.com.
;; additional section:
cogito-ns1.labourey.com. 23h44m10s in a 194.38.95.241
===================
## NS records for cogito-info.com. domain from nameserver ns2.cogito-info.ch.
; (1 server found)
;; res options: init defnam dnsrch
;; got answer:
; flags: qr aa ra; query: 1, answer: 2, authority: 0, additional: 0
;; answer section:
cogito-info.com. 1d in ns cogito-ns2.labourey.com.
cogito-info.com. 1d in ns cogito-ns1.labourey.com.
===================
### Queries for nameserver address in-addr.arpa. records
>
> Hello,
>
> I have a strange problem. Mail sent to @cogito-info.com is either
> correctly and promptly delivered, either delayed or never arrives.
> While it seems as a truism, the last two cases are *very* frequent.
>
> To check the problem, I have subscribed to a yahoogroups which gives
> history information about unsucessfull delivery. Result : I have
> plenty of "No MX or A record for cogito-info.com" in my history.
>
> some info regarding cogito-info.com. :
> - DNS1: 194.38.95.241, NS1.COGITO-INFO.CH (please read *ch* and not
> *com* here)
> - DNS2: 194.38.95.241, NS2.COGITO-INFO.CH
>
> So, I've tried to nslookup using any distant DNS server selected by
> its high probably that some data for my domain hasn't been cached.
> Issuing a
> > server pure-dns-host.distant.com
> > set q=mx
> > timeout=90
> > cogito-info.com.
>
> ...times out after more than 90 seconds (and this, repeateadly)! BUT,
> issuing a query for "cogito-info.ch." (please read *ch* here), and
> *then* again "cogito-info.com." makes the query works! (cogito-info.ch
> and cogito-info.com domain names are hosted on the same servers).
>
> <image>
> It is "like" if to resolve cogito-info.com, the distant resolver first
> tried to resolve cogito-info.ch (to get ns1 or ns2.cogito-info.ch) and
> this second query was causing a "deadlock".
> </image>
>
> (cogito-info.ch. has strictly no problems, even if they share the same
> servers (dns and mail)). The only difference is that their nameservers
> host names are different (cogito-ns1.labourey.com and cogito-ns2 for
> cogito-info.ch.)
>
> Any idea? Thank you! I am really lost with no more clue...
>
> Cheers,
>
>
>
> Sacha
>
--
Mark Andrews, Nominum Inc.
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark.Andrews at nominum.com
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