Question : SMTP Service draining our DNS Server

Hi,

I am battling with this issue for the last 2 days and I am quiet out of solution for this one. Here is our scenario

We have our DC configured as our main DNS server. We have another server that we use for our email campaigns. This second server have the SMTP service installed. I have configured it to use a dedicated NIC with a static IP Ip Address with our both ISP DNS settings. I thought at the first place that it would go through without any sollicitation to our internal DNS. No can do...

As soon as we press that button "send" the SMTP server chokes our DNS server resulting in the impossibility to surf and open any web page.

When I nslookup a domain for the first time, it returns the following information (See below)

Then I thought about deploying a secondary DNS server - thinking that any DNS query qould be forwarded to the second server. Not a chance. Even this does not solve the issue. The only way we can get through is by reloading the page over and over again, up until it gets resolved.

Also, I have tried to change the timeout default value on the DNS server from 2 to 5 then to 8 but it stick to 2 seconds and does not seem to take in consideration any parameter I put myself.

Suggestions are most welcome here.

Thanks

Code Snippet:

         
             DNS request timed out.
    timeout was 2 seconds.
*** Can't find server name for address 10.0.0.2: Timed out
*** Default servers are not available
Server:  UnKnown
Address:  10.0.0.2
 
DNS request timed out.
    timeout was 2 seconds.
*** Request to UnKnown timed-out

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Answer : SMTP Service draining our DNS Server

Hello,
To recreate the DNS follow these steps (per a Microsoft tech when I had to do it):
1)      Under c:\windows\system32\config rename the netlogon files as old.
2)      Delete the old DNS zone
3)      Install a new zone
4)      Take all defaults except make secure insecure. Also the name of the zone should be the name of the AD, such as nmpg.biz.
5)      Under command prompt type the following: IPCONFIG /FLUSHDNS & NET STOP NETLOGON & NET STOP DNS & NET START DNS & NET START NETLOGON & IPCONFIG /REGISTERDNS & NETDIAG /FIX
6)      Run Nslookup and make sure that there are no errors.
7)      Install the reverse lookup zone. Take all defaults except for secure make unsecure and secure.
8)      Under New Pointer do the server IP and make it the server.
9)      Under command prompt type the following: IPCONFIG /FLUSHDNS & NET STOP NETLOGON & NET STOP DNS & NET START DNS & NET START NETLOGON & IPCONFIG /REGISTERDNS & NETDIAG /FIX
Hope that this helps.
Thanks,
Kelly Wilke