The plugin that I used is SB RSS Feed +, however, there's some backstory that will probably be relevant:
* We use MailChimp to power our newsletter
* We use MCs RSS shortcodes + Wordpress RSS feeds of specific tags to populate our newsletters with content
* To make images show in MC RSS shortcode-powered emails, you need to add images to your RSS feed, as Wordpress does not offer this natively
* SB RSS Feed + was the highest recommended plugin I found to suit this purpose
* Here is a screenshot of the relevant settings:
http://screencast.com/t/WvoEtKt6ve - As you can see, you can opt to include <media:content> and not <enclosure>, which was perfect for me, as I need <media:content> for MailChimp, but need to NOT have <enclosure> for PowerPress
This all comes on the heels of a website relaunch, so now we should finally be set on our newsletter and podcast.
Thanks for your support and the great plugin!
Best,
Paul