Ditto. The cheapest iCloud subscription includes everything necessary. My partner and I both have emails through our respective personal domains, all on the same sub – I think the limit is 3 custom domains.

iCloud Mail will silently filter emails with certain words (including in attachments).

You aren’t told something has been filtered and it doesn’t go to spam. It’s just deleted with zero recourse. The sender isn’t notified either.

https://talk.macpowerusers.com/t/icloud-mail-what-to-do-when...

I had this happen as recently as June 2026 when my current provider was up. It happens on @mac.com @me.com @icloud.com and custom domains.

I second this recommendation. My custom domain emails work wonderfully through Apple iCloud account.