HTML email

Support for HTML email would be nice. Making email templates from Divi Layouts is probably not possible as HTML and CSS for emails are somewhat limited. So the options are probably limited to simple customizations of predefined layout (as on woocommerce), a raw html input (using your own html email generator) or integration/compatibility with another third party plugin. There are several online editors for making raw HTML templates available, and found at least on third party wp plugin alternative with Divi support: https://wordpress.org/plugins/wp-html-mail/

Some sites also have newsletter plugins installed with their own designer modules. So integration/compatibility with plugins like Mailchimp or MailPoet is also an alternative.