I am updated to the latest version of Mailpoet. I am using the Yoast SEO plugin and can make sure Mailpoet pages are excluded from the sitemap.
However, since the confirmation page is auto-generated by the MailPoet plugin and not available to see in our WP dashboard as an actual page, there isn't a way to automatically add a noindex. I just launched a site this past week and the Mailpoet default subscription confirmation page is already indexed.
How can we noindex this page?