Shootmail

Notion-like email builder that produces high quality emails with minimal efforts with a growing directory of beautiful, responsive and highly compatible email templates for use cases like product launches, onboarding, authentication, order updates & many more.
Shootmail has pre-built email templates that are beautiful, responsive and support major email clients like Outlook, Gmail, Apple mail etc, and obviously the dark mode.

For the folks who want to design their own emails, there is a notion-like email builder that is powerful enough to make complex designs but simple enough for anyone to get going without any expertise.
Best of all, this is pay once, own forever product, and you can get it at 50% OFF currently. Enjoy current and all the upcoming features.