Posteo

Posteo is a German email service founded in 2013, focusing on sustainability and user privacy. It provides encrypted email communication and supports various encryption protocols to ensure secure transmission. Posteo is committed to environmental responsibility, using green energy sources for its data centers. The service does not require personal information for registration, enhancing user anonymity. Posteo includes features like calendars, address books, and aliases for added privacy. The subscription model is affordable, and users can choose to support environmental projects through their payments.