iCloud Mail: Custom domain error, length limits?

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iCloud Mail: Custom domain error, length limits?

I tried to add a custom domain so I could use my iCloud service for my emails. Use Custom Email Domain with iCloud Mail – Apple Support (UK)

I was able to add

vendum.co

vendum.coffe

but not

vendum.coffee (the domain I want to use)

Are there limits to the length of the end of the domains I can add?

I get...

Enter the domain you want to use with iCloud Mail

Domain

Error

There was a problem with adding this domain. Please try again later.

Your help would be appreciated. At the moment I am using Cloudflare forwarding. For my emails, perhaps I should delete that first? Thanks!

Phil

Posted on Jul 7, 2026 8:26 AM

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Answer 1

Jul 7, 2026 5:02 PM in response to Thump76

Do you own the domain you are trying to add? You cannot just enter any value there. You must have already purchased the domain name from a domain registrar.

One tip when ready to purchase a domain name is to make a decision but never go online and search to see if someone already has it. If you do, automated processes WILL steal it. Instead, go to a respected registrar's website (e.g. https://www.gandi.net), search for the domain, and then buy it on the spot. Once you own the domain, then return to following Apple's instructions.

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