I'd like to recommend protonmail, I"ve used them for about 3 or 4 yrs and really like them. It's free and all emails incoming and outgoing are encrypted. They respond quickly if I have a problem or question, which has only happened 2 or 3 times. They have lots of handy extra features, too. I'm not getting paid to promote them. Here is more info and how to sign up:
https://www.fanslite.com/protonmail-sign-up-new-email-account-create-a-protonmail-account-protonmail-login/
protonmail.com