Link the newsletter registration form to Mailchimp in WordPress
You want to automate as much as possible. So also the subscriptions for a newsletter via your WordPress website. And the good news is that you can, you can send the registrations directly to Mailchimp via an API. A plug-in is available for this purpose that links Mailchimp to the Contact Form 7 plug-in. This is the most used plugin for forms, as well as a registration form for the newsletter.