Set up "SPONSORED" content flag to flow into email newsletters

"Sponsored content" is becoming a larger part of news organizations' revenue offerings to advertisers. But it's important that sponsored content be flagged as such in all formats to ensure the reader can differentiate between what is sponsored and what is actual news content. So we use the "SPONSORED" flag when posting articles through BLOX. However, when we pull articles into an email newsletter, the "SPONSORED" flag does not show up in the newsletter, so the content appears in the newsletter just like any other editorial content. We'd just like the option to have the "SPONSORED" flag show up in the newsletter, and ideally, for the sponsored content to be somehow distinguished, such as a shaded background. This would avoid confusing the reader and keep the delineation clear between actual news content and sponsored content.