Cannot add or verify my normal email address with iCloud custom domains

Same issue. I added 2 adresses, but a third one remains non accepted. Not exactly the same error message mine is: Erreur {{APIError.EmailAdd.InUse}}. Then it seems Apple iCloud knows this address too. I spend some times with Apple Assistance today by phone, but even the level 2 expert did not find any solution. I will continue some investigation and update here if I find a solution.

Good luck on your side.

I was successful adding 3 custom alias' with my domain but I can't use them. I see them in the account settings but they aren't in the drop down menu when I go to compose an email. Strangely I do see them on my iphone's mail app, not on the macbook however. So far this has definitely been a beta experience.

Ok, tried to add 2 custom domains:

1. One is just for my private use. Added the domain, added an email address, just below my iCloud identity icon, all went fine without a glitch. Changed DNS settings at the domain registrar, completed the procedure. Email service works just fine. Even managed to add it into the stock MacOS Mail app via SMTP account (it duplicates the main iCloud mail account, with all the messages and folders structure, but nevertheless still uses MyCustomEmail @ MyCustomDomain. com address).

2. Another domain I tried to add was for family use. Added the domain. Then it offered to add an email under my iCloud identity icon. It didn't offer to add an email for any other family member. But ok, tried to add one for myself, for now, like for a private-use domain. When confirming the addition, it returned: "APIError.EmailAdd.InUse'. I tried to add 3 different names, all been in use before with the previous email hosting provider, same error: "APIError.EmailAdd.InUse". Then tried to add an email never used before, and it went through just fine. But I need to use the ones I used before, so I deleted the domain and tried to add it as for my private use. But the problem with adding emails remained.

Just my 10 cents for Apple to fix it sooner.

Been having this same issue, I brought up the error console to expose the actual error and looks like it's the same as during initial setup for me:

Error: You can't use an email address that contains explicit language.

Not sure how my email is considered explicit as it's similar to yours - firstname @ lastname.com.

Hoping this is fixed once it is out of Beta, guess it's back to Workspace for now!

Have exactly the same issue.

1. added an existing domain "domain.com"
2. when presented "only you" or "family", I opted for "family"
3. was presented with entering email adresses for family members, but opted to skip
4. received confirmation-mail from apple with DNS specifications
5. made necessary changes with my domain registrar
6. received confirmation my domain "domain.com" is now linked to icloud+
7. tried to add an existing email adres: existing @ domain.com -> this failed with same error as above
8. tried to add a new email adres: new @ domain.com -> succesful

The strange thing is that emails send to "existing @ domain.com" do arrive in my icloud+ mailbox. However I canot send mail or add this email adres as an alias of my icloud+ email account.

see also: https://www.idropnews.com/news/icloud-custom-domains-now-available-in-public-beta-heres-how-to-set-them-up/166313/

One of the biggest problems seems to be that you won’t be able to use a custom domain email address if it’s ever been used for another Apple ID. If your current Apple ID uses your custom email address, you can, of course, set this up with a custom domain, but if you’ve ever used it for another Apple ID — even one that’s been deleted — Apple won’t ever allow it to be used again. According to Apple Support, this is intentional, so it probably won’t change once the feature comes out of beta.

I have the exact same issue, getting error message "There was a problem adding this email address. Try again later." and I do not get the email verification only for this specific address which is actually my apple id. Emails sent to this address bounce back.

If I understand well the above, changing the email of my Apple ID won't resolve this problem.

So do Apple plan to do anything about this?

I'm sure this is a dead end, hopefully not, but cloudflare is really driving me batshizz crazy with my desire to use a cloudflare domain, which was promoted via iCloud. If it's not a dkim error then its a spf record error or something else. Finally, after updating all dns records, multiple times, I finally get the error indicating that I need to provide a security code for an email address that is under the new domain that I'm attempting to add to icloud to host the email...really? Soooo....how would I obtain a security code for a domain that I do not yet have the ability to check the email, obviously. Driving me nuts. Any takers on this one?