Embed a signup form from Mailchimp or any of a dozen competitors. https://mailchimp.com/help/add-a-signup-form-to-your-website/ https://mailchimp.com/help/add-a

Embed a signup form from Mailchimp or any of a dozen competitors. https://mailchimp.com/help/add-a-signup-form-to-your-website/ https://mailchimp.com/help/add-a-signup-form-to-your-website... works fine with Mailchimp's free plan, supports custom fields, and can be embedded in static HTML.