Len will probably give you a much more thorough answer, but the the problem does
appear to be on your end. Connecting to either of your name servers
(ns1.cyberlink.com and ns2.cyberlink.com) show non-authoritative answers. It's fine
to get a non-authoritative answer from other DNS servers (such as ours here); it just
means that the other DNS servers might have a cached answer. But, yours can't do
that. You need to figure out why your DNS servers are not sending authoritative
results.
-Scott
---------- Original Message ----------------------------------
From: "Patrick Moss - CyberLink Technical Support Group" <[EMAIL PROTECTED]>
Reply-To: [EMAIL PROTECTED]
Date: Wed, 12 Jul 2000 09:38:14 -0500
I have a customer who can not send mail to [EMAIL PROTECTED] I have tried
everything that I can think of to find an error on my end but cannot - the
Admin on the other end is no help. Below are some of the tests that I have
run and Imail logs, to try to prove that the problem is not on my end, as
well as a response from there admin. I was under the impression that a
Non-authoritative answer meant that the lookup came from the Name Server's
Cache - not some evil word and all mail should be blocked. I have been
working on this on and off for about a week and a half. Could someone help
me out?
>** jedi.accn.org says that cyberlink.com domain does not resolve -
>** Apparently trying to resolve MX record for cyberlink.com with PTR
>record.
>** Common anti-spam technique.
>
>07:05 10:23 SMTP-(00000139) >MAIL FROM:<[EMAIL PROTECTED]>
>07:05 10:23 SMTP-(00000139) 451 4.1.8 <[EMAIL PROTECTED]>... Domain of
>sender address [EMAIL PROTECTED] does not resolve
>07:05 10:23 SMTP-(00000139) SMTP_DELIV_FAILED
>07:05 10:23 SMTP-(00000139) >QUIT
>07:05 10:23 SMTP-(00000139) 221 2.0.0 jedi.accn.org closing connection
>
>** However, ns1.accn.org with nslookup shows that
>** IP for cyberlink.com MX record (smtp.cyberlink.com 63.160.229.2)
>** DOES MATCH!!
>
>C:\>nslookup
>Default Server: ns1.cyberlink.com
>Address: 63.160.224.2
>
> > set q=ns
> > accn.org
>Server: ns1.cyberlink.com
>Address: 63.160.224.2
>
Non-authoritative answer:
This is the response that I get from there Admin?
That is all I can assume the problem
is. We have strict anti-spam policies in place, and if your domain does not
authoritatively resolve, I doubt our mailserver will accept mail from it. I
have verified the domain lookup from off our local site here (from 3
external sources actually) and it seems that cyberlink.com does not
authoritatively resolve from any lookup. It may well resolve during a
nslookup/dig session, but unless it does so authoritatively, there is
nothing I can do. I can not revoke the strict policies we have regarding
mail from non-authoritative hosts.
But here is an NS Lookup session from there
server???????????????????????????????/
>accn.org nameserver = NS2.accn.org
>accn.org nameserver = NS1.accn.org
>
>NS2.accn.org internet address = 216.120.148.2
>NS1.accn.org internet address = 216.120.151.5
> > server ns1.accn.org
>Default Server: ns1.accn.org
>Address: 216.120.151.5
>
> > set q=mx
> > cyberlink.com
>Server: ns1.accn.org
>Address: 216.120.151.5
>
>Non-authoritative answer:
>cyberlink.com MX preference = 0, mail exchanger = smtp.cyberlink.com
>
>cyberlink.com nameserver = NS1.cyberlink.com
>cyberlink.com nameserver = NS2.cyberlink.com
>smtp.cyberlink.com internet address = 63.160.229.2
>NS1.cyberlink.com internet address = 63.160.224.2
>NS2.cyberlink.com internet address = 63.160.224.3
> > set q=ptr
> > 63.160.229.2
>Server: ns1.accn.org
>Address: 216.120.151.5
>
>Non-authoritative answer:
>2.229.160.63.in-addr.arpa name = smtp.cyberlink.com
>
>229.160.63.in-addr.arpa nameserver = ns1.cyberlink.com
>229.160.63.in-addr.arpa nameserver = ns2.cyberlink.com
>ns1.cyberlink.com internet address = 63.160.224.2
>ns2.cyberlink.com internet address = 63.160.224.3
> > set q=a
> > smtp.cyberlink.com
>Server: ns1.accn.org
>Address: 216.120.151.5
>
>Non-authoritative answer:
>Name: smtp.cyberlink.com
>Address: 63.160.229.2
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
Patrick Moss - Technical Support Group - Assistant Systems Administrator
CyberLink, Inc.� - Featuring SurfPure Filtered Internet Access
http://support.cyberlink.com
[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
(888)Plug-in2
(219)235-1400
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'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
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