Setting up i-phone to receive and send e-mail

I have been unable to get my i-phone to receive or send e-mails. I was on live support with Greg for 87 minutes and I’ve been to
and I still can’t get it to work.
I don’t know the answer to AUTHENTICATION PASSWORD .

where do I find this or set this?

I turned SSL to ON and put port 993

WHAT IS IMAP PATH PREFIX/ do I need to answer that?

Do I need to put S/MIME to ON?

I’ve answered this a number of times in this forum. See post 2 of this thread for a recent response.