Email

Rootshell is a new end-to-end encrypted (E2EE) email service hosted in Iceland, aiming to provide secure communication for users.

Fidonet is a point-to-point and store-and-forward email WAN developed in 1984, with over 20,000 public nodes worldwide. It uses modems on the direct-dial telephone network and has gateways to the Internet via uucp.

Posthorn is a self-hosted email solution that eliminates the need for a dedicated mail server, allowing users to host their email infrastructure on their own servers. It was showcased on Hacker News.