Did you know that you can use iCloud+ with a custom email domain? Yep, that’s right. This is what I was doing for hello @ numericcitizen.me until this week when I started my migration to Fastmail. But there is one challenge that I didn’t expect: I wanted to bring this custom email to Fastmail, too. Custom email domains with iCloud+ is managed only on the iCloud website.

Having Apple Advanced Data Protection (ADP) is cool and nice but can make managing iCloud+ Custom domains a pain. As a reminder, to use ADP, you must turn off iCloud web access. I’m not really sure why. As soon as this is turned off, you can no longer manage your custom email domains that you might have configured for use with iCloud+. To complete my migration to Fastmail, so that I could write and respond from that custom email address from Fastmail, I first had to remove that domain from iCloud+, but it’s only possible on the iCloud website. To do that, ADP must be turned off. Once done, you can re-enable iCloud website access, then remove the custom email domain. After some cleaning up of Apple-related DNS records, you can re-enable ADP and disable iCloud website. Only then I can go on Fastmail Settings and configure my custom email domain.

Now you know.