Once I had I2P properly running, I got me a mail account from hq.postman.i2p. Accounts can send and receive mail from the normal internet. Postman’s I2P-based mail system can be accessed either via I2P’s built-in mail client (susimail) or using any mail client that supports smtp and pop3. But not all clients are suitable for that.
I2P is an anonymising network, offering a simple layer that identity-sensitive applications can use to securely communicate. All data is wrapped with several layers of encryption, and the network is both distributed and dynamic, with no trusted parties.
I2P is still a work in progress and it should not be relied upon for “guaranteed” anonymity at this time. It is not immune to attacks from those with unlimited resources, and may never be, due to the inherent limitations of low-latency mix networks.
Still, it provides an excellent mindset fitting predatorial universes