set up an email address with your own domain

Hello dudley dorite,

You can set up a Custom Email Domain by following these steps found at Use Custom Email Domain with iCloud Mail - Apple Support:

If you subscribe to iCloud+, you can use a custom domain that you already own to send and receive email from a personalized email address with iCloud Mail.

* You can use up to five custom domains, with up to three personalized email addresses per domain. 

* You can use your personalized email address in the Mail app on any device signed in with your Apple ID and with iCloud Mail turned on, and on iCloud.com/mail.

* You can also use your personalized email address for Messages, FaceTime, Calendar, to sign in to your device, and more.

* If you don't have any existing email addresses in use with your custom domain, you can create new personalized email addresses after setting up your domain with iCloud Mail.

* If you share iCloud+ with your Family Sharing group, you can share your custom domain with your Family sharing group and allow them to create personalized addresses. In iOS 16 or later, you can also share your custom domain with people outside your Family and allow them to create personalized addresses.*

* You can share your domain with up to five other people. If you add someone who’s not part of your Family Sharing group, they need to accept the invitation before they’re added to the domain.

If you don't already own a custom domain, learn how you can purchase an email domain to use with iCloud Mail. 

Cheers.