If you have an RSS feed snippet inserted into your email or landing page, the feed will be loaded in real time into a landing page as the user views it. 

However, for an email with an RSS feed, it will pull the feed once when the email is sent, and not live update the feed as it does on a landing page.

For more information on inserting RSS feeds into a landing page or email, see this article on RSS Feed Snippets

Digest can work with both Private and Public RSS feeds; however, to work with Private RSS feeds, the Vuture server IP needs to be allowed to view the data in the RSS feed. Otherwise, it will not see or pull the data into the RSS Admin data website.