IMail

Invisible mail (iMail) is a secure and anonymous method for exchanging digital messages. It operates as an open protocol with a Java implementation called I2P-Bote, which is free and open-source under the GPLv3 license. Unlike standard email, iMail ensures that both the content and identities of senders and recipients remain unknown to third parties, including ISPs and server administrators. All messages are automatically end-to-end encrypted, and headers are also encrypted, unlike GPG or PGP-encrypted emails. iMail addresses, known as "destinations," are longer than typical email addresses and do not include the "@" symbol or domain. These destinations integrate encryption keys, making their use similar to standard email with GPG encryption but more secure. However, iMails cannot be sent to regular email accounts. The I2P-Bote system operates on the I2P network, a pseudonymous peer-to-peer overlay network. Messages are sent through a store-and-forward model, allowing users to connect briefly for sending or receiving. The system is fully distributed and serverless, with peers handling message forwarding and delivery. iMail messages consist of an envelope, header, and body. Headers include control information like recipient addresses and optional details such as subject lines and timestamps. Messages can carry international text sets and multimedia attachments, adhering to MIME standards (RFC 2045-2049). Attachments can be large, though practical limits exist due to network constraints. Key features include end-to-end encryption, message authentication via digital signatures, and the option for anonymous sending without originator information. However, iMail currently lacks POP3 or SMTP implementations, limiting access to a web interface. ...