We help people do this with our service: https://www.feedsapi.org/ , maybe it's exactly what you are looking for. It works not only with email but with Evernote, Instapaper and rss readers + it clips the full article content.

Check out http://www.klipperapp.com.. you can feed in sources and get 'klipped' articles.

What niche, if you don't mind sharing?