With the introduction of iCloud+ (plus), Apple also offers subscribers the ability to set up a custom email domain. If you’ve purchased or plan to purchase your own domain, you can manage email addresses using that domain through iCloud Mail.
Maybe you have your own domain to showcase your work on the web, such as a portfolio. Or perhaps you set up a domain name for your family to share news and events. By adding these types of custom domains to iCloud, you can use Apple’s Mail app to manage your emails on iPhone, iPad, or Mac. You don’t have to worry about a separate server or email service, and for a family, everyone can have their own email address with the family domain name.