Author email newsletters in WordPress
Copy your Mailchimp API key, which can be found in Mailchimp in Account->Extras->API Keys
.
Request MJML API access.
Navigate to Settings->Newspack Newsletters
. Input Mailchimp API key and MJML API key and secret.
Click Newsletters in the left menu. Create a new one.
Run composer update && npm install
.
Run npm run build
.