Who are the email marketing gurus/ courses?

But I have no idea who’s really good at email marketing. Who are the real authentic gurus? Not the charlatans

I’m competent in SEO( I know too much SEO and nothing else ), but have never bothered to learn email marketing. I really need to learn the psychology and actual methods behind landing pages, email capturing, auto-responder campaigns, and pushing that product at the end.

Really favor a course as I find the objective is concise and divide the wheat from the chaff; they are much more efficient than reading blog posts or trying to learn it on your own.

What would you recommend ???