Nslookup -----> non-existent domain

We have has our DNS server in place for a long time, and everything I worked fine as far as I could tell.  We had some mobile users come up, and the could not get to their smtp mail server.  Somone told me to run a nslookup on the mail server and I get... (I have used msn.com for this example)

C:\Documents and Settings\XXXXXX>nslookup msn.com
*** Can't find server name for address 192.168.0.3: Non-existent domain
*** Can't find server name for address 192.168.0.3: Non-existent domain
*** Default servers are not available
Server:  UnKnown
Address:  192.168.0.3

Name:    msn.com
Address:  207.68.172.246

Does this mean that something is wrong, or is this a normal responce?  Like I said as far as I can tell everything else works.  
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Tom_HickersonAsked:
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Toni UranjekConsultant/TrainerCommented:
Hi smeek,

You should configure reverse lookup zones for your subnet, 192.168.0.0/24, I presume and add PTR record for server with IP 192.168.0.3 and query will stop returnig errors. Right now your own DNS server can not resolve its own IP address to name.

HTH

Toni
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mattaobCommented:
It means your nameserver at 192.168.0.3 isn't working as a caching name server.
If you're using 192.168.0.3 as your only name server you might have problems.

Is the dns service running on 192.168.0.3?
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Tom_HickersonAuthor Commented:
The computer that is the DNS server is 192.168.0.3.  That is the only DNS sever in the network.

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gambit_642Commented:
Did you try nslookup remotely?

If mobile clients are having trouble resolving the SMTP server, then it is a problem with your public domain registration.
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gambit_642Commented:
If the server is using itself as the primary DNS server, ensure that you have and entry for the exact
FQDNS in the DNS management console.

For example, if you are server1.mycompany.local
you should add an domain and entry for mail.publicdnsname.com
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Tom_HickersonAuthor Commented:
gambit
The smtp server is not my own, and I was not concerned about that as much as I was the errors I got from the nslookup.
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gambit_642Commented:
oh, read that wrong, I agree with toniur.

The error is not a big deal, and shouldn't cause remote users from being able to SMTP publicly.

Simply says that you server cannot resolve it's own DNS name from its IP.  You would have trouble if it was the other way around.

Just means you don't have a reverse lookup entry in whatever DNS server it is querying.
If you can ping the DNS name remotely and locally, DNS is not goofing your SMTP.
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Tom_HickersonAuthor Commented:
Ok.  I am going to try and add a reverse lookup zone.  I don't know what settings I use when adding the zone.  
Primary, Seconday, or Stub, and a bunch more choices after that... Can you point me in the right direction.  
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Madison PerkinsConsultantCommented:
for server 2003 active directory reverse lookup zone.

New Zone WIzard.
Zone Type > Primary Zone and Store in active directory checked.
AD Zone Repl Scope > to all DNS servers in the AD domain company.local
Forw or Rever > Reverse checked
Rev Lookup Zone Name >  192.168.0
Security settings > what you used for the Primary Zone.
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Tom_HickersonAuthor Commented:
Thanks that fixed it.
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Windows Server 2003

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