Turn Primary iCloud Address into Alias on Different Account, Possible?

I appeal once again to the munificence of the premier Apple-centric brains trust, in search of knowledge and wisdom, to solve a tricky little problem.

A bloke I know—we’ll call him Pete—is in a tight spot. He’s created an iCloud email address that he is using primarily for mailing list traffic. He has recently discovered (thanks to me, as it happens) that he can edit his server-side mail rules in the iOS Settings app (iOS 17+) but, alas, it transpires only for the primary iCloud user on the device. (Settings, your profile, iCloud, iCloud Mail, iCloud Mail Rules …) If an iCloud account is a secondary account, then even though it supports the basic mail/contacts/calendars services, strangely, it does not offer the interface for configuring mail rules (or, indeed, much of anything beyond toggles for the services).

But Pete wants to use that interface. He jumps on and off many lists and the web UI is just too much of a stretch, even in mobile Safari. I have been thinking about how we solve this problem, and it seems to me that a safe bet would be to simply forward his lists account to his real, primary account, from which he could then use this UI to filter mail. However, he’d still have to sign in in order to send mail from his lists address, and I wonder if, by use of aliases, we could circumvent even the need for the secondary account. The other approach—of swapping the accounts used—is off the table, because his primary account is where all the action is and losing it just for this would be unacceptable.

So the question is this: if we could somehow rename his secondary lists account to something unused, then create an alias on his primary account to reclaim that address, would it then be possible for him to live the one-account-for-everything dream that Apple intends for him? It would all rather depend on whether Apple would let him take a former iCloud address, that he owns, as an alias for another iCloud account, that he also owns. I’ve done lots and lots of Googling, and ChatGPT 4O says it’s impossible, but I’ve not seen anyone discussing this; if anything, all I see is the reverse, that of people wishing to turn an alias into an account, which is not what we want here (and is, incidentally, still forbidden by Apple). The caveats Apple has for reusing email addresses frankly melt my brain, so I would not be at all surprised to learn that this plan won’t work. But the forwarding approach would seem to have a high certainty of working, so that will be the backup plan if doing this little manoeuvre isn’t possible.

Any help/experience/advice greatly appreciated!

It used to be that you could not, but I know that Apple recently changed things. See Add and manage email aliases for iCloud Mail on iCloud.com - Apple Support and What are email aliases in iCloud Mail? - Apple Support - but in that second link, notice it says:

Aliases can’t be changed, transferred, or converted to primary accounts.

So I don’t know. That said:

He should be able to log in to the account on a web browser at iCloud.com (on a computer - not sure what the interface is on a mobile browser) and set mail rules there. I know that I can with my secondary iCloud account.

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So, in the end, our Pete decides to just use the rules interface at icloud.com, after all, despite saying earlier that he would prefer not to. So the issue goes away. Thanks anyway for the reply. I’d still say it’s essentially unknown whether it would work, though I think it should, obviously. Likewise the rules UI for secondary accounts. I’ll dash off some feedback to Apple.

It works! I have a rule on my secondary account and, as a server-side rule, it engages when the condition is met.

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OK, but can you reach those rules through the iOS UI? This is what all this hinged on when I was looking into it. That rules work is, thankfully, beyond doubt (thanks for confirming). His problem was always getting that address under his primary account just so he could use the UI in iOS.

Yes, but it’s not obvious.

First of all, just to make sure that I didn’t mess myself up, I created a new Safari profile for the secondary iCloud account in Settings / Apps / Safari. Then in that profile I logged in to the secondary iCloud account, went to mail. This opens the In Box view - to get to settings you click the back button to show All Mailboxes, and this reveals the settings icon.

This is where it gets less obvious. This opens the account settings, but there doesn’t seem to be a place to change rules. This took me a minute to find, but you tap the control that says “Account” at the top of the screen to reveal the page for Rules settings. Generally I don’t pile on to the UI/UX simplifications that Apple has instituted since iOS 7, but this one was particularly inscrutable - it’s basically tapping the “sidebar” icon that Apple has added recently, but it was non-obvious to me.

Here is a marked up screenshot showing where to tap:

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OK, got it. I’m using VoiceOver and so is Pete, but thanks to your description I’ve figured it out. This is doable if fiddly.

I wish the native Settings UI were available for secondary accounts, that’s clearly much easier, but he’s willing to sign in on desktop already so, although it isn’t as nice (especially without passkey auth), it should still be possible for him to manage it all on iPhone now.

Thanks a lot. He’s happier not to have to use macOS rules to do his filtering anymore specially since they triggered push notifications that were redundant. Server-side is much superior.

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Right, I seemed to remember that you used VoiceOver so I’m trying to train myself to use alt-text and descriptive explanations whenever I can.

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