Mailbox and Posteo do have transparency reports (https://mailbox.org/de/pressemitteilung-transparenzbericht-2018 https://mailbox.org/de/pressemitteilung-transpa

Mailbox and Posteo do have transparency reports (https://mailbox.org/de/pressemitteilung-transparenzbericht-2018 https://mailbox.org/de/pressemitteilung-transparenzbericht-2... and https://posteo.de/site/transparenzbericht https://posteo.de/site/transparenzbericht). Both also support privacy groups via donations (https://mailbox.org/de/post/mailbox-org-spenden-2018 https://mailbox.org/de/post/mailbox-org-spenden-2018 and https://posteo.de/site/wirunterstuetzen https://posteo.de/site/wirunterstuetzen). Posteo also hosts privacy related events (https://posteo.de/lab/ https://posteo.de/lab/).