I had the same problem. I’ve tried the above. (Not the WP Mail Logging) WP Test Email works. Changing to php mail and back to WP mail did not work. As a last try before contacting you I made the “Your email” and “From Email” different and viola! it works. “From Email” refers to a FAQ for the plugin which I can’t find. Could you kindly point to it. (Sorry if I’m blind. Happens.)
