iCloud Mail is Apple’s mail service, use it to create an email address to use across all Apple devices. Emails set up in iCloud should have either an @icloud.com, @me.com, or @mac.com email address.
Since the introduction of iCloud+, you have been able to set up your custom domain email in iCloud. The primary benefit of this is that it utilizes iCloud’s advanced inbound & outbound spam filtration. Other benefits include:
Seamless integration with other Apple products, without the need for additional setup.
Off-site independent backup.
Disconnecting from your hosting package, putting less load on your hosting package.
Setting up iCloud Mail on your device is the first step to getting your custom domain name on. This process is easy and is supported across multiple devices, including Windows.
iOS or iPadOS.
To start, open or unlock your device.
Afterwards. Open the settings application by clicking the grey/silver cogwheel icon.
Next, click your “name/Apple ID”.
Finally, click “iCloud” and when prompted click “create”
The setup process on macOS follows a similar procedure as above. Open the systems preferences area by clicking the same cogwheel icon as above. Then select your Apple ID, iCloud, and then the Mail application.