We help IT Professionals succeed at work.
Get Started

Internal / External DNS Entries & MX Record

Last Modified: 2012-05-06
Hello Experts,

So heres a quick summary of whats happening.  I have inherited a huge DNS mess.  We have external entries hosted through GoDaddy.com and two internal DNS servers.  I also have just installed a second exchange server, and I am in the process of removing the first server.    Before I remove any servers, I want to ensure that the e-mail continues to route correctly.  I have followed all steps outlined in http://support.microsoft.com/kb/822931.

Currently in the GoDaddy control panel, I have an @ record that points to the public url of my webserver (  I have an MX record that lists mail.luceresearch.com with a priority of 10 that points to the host @.  If I check this on www.mxtoolbox.com it resolves correctly to the IP address

The new mail server is located at the public IP address  How would I configure this in GoDaddy's DNS control to point my MX record at my new server IP?

Next - Internal DNS....
Oy - its a bigger mess.  I have the forward lookup zone lucer.luceresearch.local, luceresearch.com, and luceresearch.org.  All names and private IP's are listed in the .local zone.  In the luceresearch.com forward lookup, there are A records that point to the private IP (i.e. www points to for DNS resolution within the intranet.  In the luceresearch.org I have two A records: mail that points to private IP ( and mail: that points to public IP (  The MX record is listed in this zone as mail, MX, and points to mail.luceresearch.org.

I want to make sure that I can point the MX record to the new exchange server before I remove the first one from the site.  I appreciate any advice.
Watch Question
This problem has been solved!
Unlock 1 Answer and 23 Comments.
See Answer
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE