此插件已于 2022年8月8日 关闭，无法下载。 此关闭是永久的。 原因：由作者请求。
...because it's not adding the featured image to my RSS feeds.
Didn't do anything at all. WP 4.8
I'm using the RSS-to-Email feature of MailChimp and when I added this plugin the featured image appeared in the RSS feed. Simply works!
It does what it says. The blog post's featured image shows on the RSS email and fits in the email width.