Exchange Server ISP Change

Hello Everyone,

We just changed ISPs to our building.

I've setup the firewall and we all have internet connectivity.

However we have no emails. I've been told I need to point the exchange server to the new IP and re populate MX records.

We are currently running exchange 2007 on SBS 2008.

I am unsure of how to do the above if anyone can point me in the right direction that would be great.

Thank You
Who is Participating?
if you do not have any idea who is your DNS provider you can use a tool for find it like MXtoolbox (, type your domain search box without www like and run it. you will see your current settings details and you can use NS lookup tool for find where was stored your DNS records.

if you find it, you can contact that provider for change your MX record with your new IP.
if your DNS records on your domain name saler company you can change DNS records via domain management panel DNS records zone.
Alan HardistyCo-OwnerCommented:
You need to change the IP for the MX record for your domain to point to your new fixed IP address.

Also make sure your ISP sets up Reverse DNS on your new IP address.
You'll need to change the MX records within your External DNS Provider.  Usually whomever hosts your External Website.
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Yas_KAuthor Commented:
@ alanhardisty

Is there anywhere I can find the steps to change the IP for the new MX record?
What is the Domain Name in question?  Who is currently your DNS Provider?
Yas_KAuthor Commented:
Our current DNS provider is our new ISP.

domain name is domain
Alan HardistyCo-OwnerCommented:
Depends who your ISP is but basically if your MX record points to you will have an A record called Mail pointing to an IP address (should be your old IP).

Change that IP to your new IP address and mail should start to arrive on your server.

You will need to login to your domains control panel to make the change.
@alan - warning and mistake acknowledged. My apologies. Was just trying to point in the right direction to modify their dns by doing a nslookup.

@Yas - Find out who your dns provider is. It may be your isp, but a lot of times it's who you host your domain or website with.
Alan HardistyCo-OwnerCommented:
@albelo - No harm done - just be careful.  As much as it is helpful info - it is also dangerous, so try to work without the info, which can make troubleshooting more complicated, but keeps your brain working ;)

I appreciate the reasons for asking and your desire to help which is great.

Sikhumbuzo NtsadaSenior IT TechnicianCommented:
If my hosting company was Godaddy, I would log in and follow the picture showing there, substituting the server names with my Exchange server.
Simon Butler (Sembee)ConsultantCommented:
If SBS has been setup as per the best practises, you will have two DNS records in your current domain:

Change the A record for both of those to enter the new IP address from the new provider.
That is it. Wait for the change to be live completely.

You should also speak to your new provider and ask them to set a PTR (Aka Reverse DNS) on to the new static IP address of

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