I made a new thing — a plugin to turn off featured image display in all single WordPress pages and posts, for use with themes that display them stupidly.
This provides an essential function that really should be baked into WordPress. When you click to enlarge an image, a modern, professional site doesn’t navigate away from the current page to do that.
As described elsewhere on this site, you can use the RSS feature of WordPress, in conjunction with automatic newsletters in email service providers such as…
Bottom line: you can’t; use mailerlite instead. By law, a company sending email for you has to know your mailing address. The law doesn’t require revealing it to your subscribers. That’s MailChimp’s policy.