iCloud Hosting Existing Domain

Hello Ross157,

This page can help out with providing a fair amount of helpful info and steps on the process for adding the email domain to iCloud: Add an email domain you already own to iCloud Mail on iCloud.com

1. Enter the domain details.
2. Add people and enter existing email addresses. Where you add the people you want to share the domain with and the email addresses you already use with this domain name. You can create new email addresses after setup.
3. Set up the domain. This will involve updating the domain's records by signing into the domain registrar or manually updating DNS records, depending on the domain. You may then note if it'll just be yourself using it or others as well.

Cheers.

Hi Ross157,

We're not seeing the answer to your question in the articles about using a custom domain, so we'd advise to contact Apple Support. They can verify what happens to the original domain, if you add the domain to iCloud.

Apple- Get Support

Take care!