Not sure how this applies to the new Google groups system we're using but Brian Krebs is always worth listening to for better personal security, especially with the likes of Google, Yahoo, Facebook. https://krebsonsecurity.com/2018/06/is-your-google-groups-leaking-data/ https://threatpost.com/public-google-groups-leaking-sensitive-data-at-thousands-of-orgs/132455/