No, that did not work
I went to System Preferences >ICloud. Unchecked Mail
Then re checked it (there was no place to save any changes, my messages, nothing disappeared)
And my Apple Mail Preferences >iCloud still shows the SMTP as being my ISP,
I can manually choose iCloud as my SMTP server but then I am not sure what to put for "TLS certificate"
Nor do I know what PORT to use in the Advanced Tab or what to use for Authentication (authentication currently is set to "Apple Token" and not "password" which is the usual choice.
Current PORT showing is "993"
So, can you help advise what the Apple Mail preferences should be for iCloud?