Re: email domains

See this Apple article: Use Custom Email Domain with iCloud Mail

Use Custom Email Domain with iCloud Mail - Apple Support

See also -> Set up iCloud for Mail on all your devices

Set up iCloud for Mail on all your devices – Apple Support (UK)

The main thing with custom iCloud email domains is you must already own your own hosted domain with an email address associated with it. A domain is a web hosting name/site you pay a hosting service to host and which you pay annually for the rights to that domain. Hosting services like GoDaddy, 1&1 IONOS and others offer for a fee the hardware to host your domain.

You can make a domain with any name you wish and for many domain identifiers (.com, .org, .name, etc) as long as the name is not already registered and owned by someone else. Many of the personal hosting services include one or more domains you can register a name with and use included in the hosting fees. Additional domains you register under your hosting account would require additional annual fees.

So just be aware, you’d be paying for your iCloud+ subscription already with its one email account (and two aliases). To use a custom domain you’ll have to then also pay for a hosting subscription with a web hosting service company, and possible also additional annual domain registration fees for the domains you want to own to use with iCloud+.