I have recently moved back to the Apple Mail app for my Live mail, using Outlook for work mail. All working as I'd expect. I also set up an iCloud email as secondary. I have iCloud mail enabled on my iPhone and iPad. If I delete iCloud mail from my iPhone, it's not deleting from my iPad and visa versa. It's also leaving the mail on the server. Is this a POP/IMAP mail thing or is it a configuration issue?