Once you are ready to migrate to your REC website, you need to alter your existing DNS settings so that the A Records point to the REC server that is hosting your new REC content.
Note: Your domain services provider can help you to make these changes if you are unclear.
We will supply you with the IP address for your new REC website e.g. 22.214.171.124
You will then need to log in to your domain services provider admin section and change the following A Records:
main domain (sometimes shown as blank or @ or called Root or Top Level)
www subdomain (sometimes called web) <- sometimes this is stored as a CNAME record
wildcard subdomains (normally shown as * or %) <- this is not essential
You will not normally change any other DNS records, which means your email will still be provided by your existing provider.
Read More: How DNS Works
Example: GoDaddy Settings
Example: Heart Internet
Cloudflare is a Content Delivery Network which allows content to be delivered around the word via a local copy of your static content, as well as providing an extra security layer amongst other benefits. A free service is available but a subscription is required for greater benefits and support of older browsers.
To set this up, you need to point your nameservers to point to Cloudflare and then follow their instructions.
Once complete you will use Cloudflare to make your DNS changes, such as adding TXT records from Mailgun etc.
If you are not sure whether your site is already running on Cloudflare, check your nameservers to see if they point there or login to your Cloudflare account if you have direct access and check if it is listed.