Do I need to change the public IP address somewhere in Exchange or 2003 server if I have a new isp issuing me a new public IP?

Basically it was all stated in the subject...

Do I need to change the public IP address somewhere in Exchange or 2003 server if I have a new isp issuing me a new public IP?

I am a bit new to exchange so I am trying to figure this out before I end up with nightmares I don't know how to fix.  

Is there anything else that will change that I am not aware of?  Other than the mx record, I have already changed that.  

Thanks in advance for your help,

- ruPPa
ruPPaAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

dianthonymCommented:
Nothing else should really need changing.  Make sure that your MX record is set correctly and that any firewall rules from the outside in are updated.  
0
jderaCommented:
Your firewall is the only thing that needs to change.  Is your Exchange server set up for NAT on your firewall?
0
ruPPaAuthor Commented:
Well, I have a firewall, but it is not issuing the addresses.  My exchange box is the DHCP server as well.  


0
jderaCommented:
That fine that your exchange is also DHCP, but check your firewall config against the static private IP of the exchange server (example 192.168.x.x).  If you have a NAT setup with a public IP, you will need to change it to one of the new public IPs that were assigned to you by the ISP.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
ruPPaAuthor Commented:
Kind of a new question.  Since changing the ISP my users can receive email, but they cannot send.  I have another guy that is onsite and telling me that the error is basically saying. "mail.<***>.local  #550 smtp 553 relaying denied.  

Any thoughts?
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft Legacy OS

From novice to tech pro — start learning today.