There is De-Mail in Germany that is basically E-Mail. Initially, sending a De-Mail would cost a couple cents. It also offered the possibility to be legally bind

There is De-Mail in Germany that is basically E-Mail. Initially, sending a De-Mail would cost a couple cents. It also offered the possibility to be legally binding, like a physical letter. Despite some technical/security issues with it, nonne really uses it (although you can now send them for free, IIRC).