Tyr - P2P Email icon

Tyr - P2P Email for Android

1.5.5 AGPL-3.0-only

True peer-to-peer email using Yggdrasil network. No central servers required.

Download APK (44.3 MB)

Version
1.5.5 (19)
Update
Developer
JB-SelfCompany
Category
Internet
License
AGPL-3.0-only
Source code
Code repository

Tyr - P2P Email App

Tyr is a revolutionary Android application that provides true peer-to-peer email communication using the Yggdrasil mesh network. Unlike traditional email systems that rely on centralized servers, Tyr runs a complete email server directly on your device.

Key Features:

  • True P2P Email - No central servers, no cloud infrastructure. Your device IS the email server.
  • Yggdrasil Integration - Built on the Yggdrasil overlay mesh network providing secure, end-to-end encrypted connections.
  • Standard Protocols - Exposes SMTP/IMAP protocols on localhost, compatible with standard email clients like DeltaChat.
  • Privacy First - All data stays on your device. Encrypted configuration backup with AES-256-GCM encryption.
  • DeltaChat Ready - Seamless integration with DeltaChat for instant messaging over email.
  • Cryptographic Identity - Your email address is derived from your Ed25519 public key, ensuring authenticity.
  • Mesh Networking - Connect via public Yggdrasil peers or configure your own custom peers.
  • Battery Optimized - Sophisticated power management with timed wake locks and network monitoring.
  • Secure by Design - Password protection using Android Keystore with EncryptedSharedPreferences.
  • Backup & Restore - Export and import all settings with optional inclusion of your cryptographic keys.

Technical Details:

The app runs a foreground service that manages the native Yggmail library (Go-based), providing SMTP on port 1025 and IMAP on port 1143 (localhost only). Your mail address format is: <64-hex-characters>@yggmail, cryptographically derived from your Ed25519 key pair.

Perfect For:

  • Privacy enthusiasts who want control over their communications
  • Users seeking decentralized alternatives to traditional email
  • DeltaChat users wanting P2P messaging infrastructure
  • Anyone interested in mesh networking technology

Requirements:

  • Android 6.0 (API 23) or higher
  • Internet connection for initial Yggdrasil peer connections
  • Battery optimization exemption recommended for best performance

Join the peer-to-peer email revolution with Tyr.


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