Introduction to Privacy-Enhancing Messaging tools

The area of messaging, which here includes instant forms of communication (resembling a chat in the physical world) as well as email (resembling more to letters), is today characterized by a massive centralization of power in the hands of specific entities. This also applies specifically to email which is designed as a federated system. Privacy is not always addressed by default and/or not easily available. Meta data of who's communicating with whom, at which time and possibly even from where, is usually not protected with the widespread systems in place today.