Apple has begun showing how iCloud + users will be able to use custom email domains, using other email addresses within an inbox.
Not even mentioned as a section during WWDC 2021, Apple adds the ability to use custom domains in email. When fully released alongside macOS Monterey, iOS 15 and iPadOS 15, users will be able to customize their email domain name, and now Apple shows how it will work.
The intention is for users to be able to replace their old @ icloud.com address – or @ mac.com, @ me.com – and instead use a custom one. Therefore, Acme Cartoon owners could switch to @ acmecartoon.com and keep all of their emails running, just with the new address.
This feature will be present on all platforms, but for now, Apple has begun testing it in beta only online. Existing iCloud users can go to beta.icloud.com, sign in and start setting up your custom domains.
However, at the time of writing this article, it is guaranteed that all users will be able to do so. All the steps to choose an existing domain that you have are present, but the last address verification step doesn’t work.
That could be a stroke of luck AppleInsider he tried it. This could go through overloading Apple’s servers. Or maybe Apple’s beta process will focus first on the front, the configuration section.
However, whether fully enabled soon or on the official launch, the steps are now clear and there is an unexpected warning.

How to set up custom domains with iCloud +
- Log in to beta.icloud.com
- Click on Account settings
- Scroll down to Custom email domain and click Manage
- Click on Add a domain you have
- Select whether this feature is something that only you will use or whether your family will share the domain
- Type the domain name you want to use instead of @ icloud.com, assuming you own it
- Please add at least one existing email address [email protected]
- Click on Add an email address
- Once you’ve added all the addresses you use to @ acmecartoon.com or anywhere else, click Confirm
- Please check the email that Apple sends to this address to verify that it’s yours
This last stage is where it currently doesn’t work or maybe it’s just overloaded. While using another option to resend the verification email, AppleInsider has not yet received any.
Problems like this are the reasons why there is beta, so it’s no surprise and the key part of all this is that we now know how it will work.

The beta version needs a button called “Oh no, it’s not”
Or rather, we know how it should work. At this point there is an unexpected warning that is surely a beta bug.
If you have a domain and use a two-letter username in front of it, such as [email protected], the beta will refuse to use it. You will receive an error message indicating that the address is too short.
It is unclear if this is intentional or will be fixed before this is released from the beta. But what will probably be fixed is the help link that is currently only sent to the general page of the iCloud feature.