I've set up an iCloud custom domain email address. address verified, all good. 2 problems:
1) I send a test message to the custom domain email address, but it only appears in my old default iCloud email mailbox, and not under the new custom address. Before you say I must set my default email addy to the new custom address, the process informs me that this will become my new DEFAULT email address. I don't want that, I only want to receive email in the correct mailbox, as I plan on adding another custom address and expect email addressed to that to also appear in its respective, correct mailbox (Apple Mail)
2) none of my old emails from the previous host were transferred. At all.
Must have missed something, but the Apple Support pages are no help here.
Got Advice? TIA!