Hi @alprio ,
We don’t have an integration with that plugin specifically, so what you would need to do here is get the HTML from the template, either from the plugin or by an email you send yourself, then paste that HTML into the “Text” view of the email body in the email action. Our editor will preserve the HTML as-is, but you will need to take that step to reuse your templates. You can then replace any dynamic content that might be in the email body with Automator tokens.