# Ygggo

**Ygggo** is a fork of [Yggmail](https://www.google.com/search?q=https://github.com/yggdrasil-network/yggmail). It is a single-binary, all-in-one Mail Transfer Agent (MTA) that sends and receives email natively over the [Yggdrasil Network](https://yggdrasil-network.github.io/).

## 🚀 Key Improvements in Ygggo (Changelog)

This fork introduces several architectural shifts and performance optimizations:

* **New Addressing Scheme:** Migrated from `hex16` to **base32**. Addresses now follow the format: `<userpub>@<nodepub>`.
* **Inter-node Protocol:** Implemented a custom node-to-node communication protocol using **Protobuf** structures.
* **Bridge Architecture:** * Nodes can now act as bridges. You can connect to a remote node from a bridge to fetch or send mail transparently.
* Private keys are only required on the bridge; the end-node can operate with public keys only, simplifying administration.


* **End-to-End Encryption (E2EE):** * Integrated **age** encryption. Emails are encrypted at the source and decrypted only at the destination bridge.
* **Privacy:** Node administrators cannot see the content of the emails passing through or stored on the node.


* **Mathematical Key Adaptation:** Leverages the fact that `ed25519` signing keys can be converted for `x25519` encryption, allowing your existing identity keys to handle E2EE seamlessly.
* **Performance & Refactoring:**
* **Streaming:** Switched from direct memory allocations to data streaming for mail handling.
* **Instant Sync:** Fixed mail retrieval updates; new mail is now detected and pushed almost instantly.
* **Code Quality:** Significant decomposition of the original codebase for better maintainability.



---

## Features

* **Sovereign Hosting:** Your inbox is stored on your own machine or node.
* **Standard Protocols:** Implements **IMAP** and **SMTP**, making it compatible with clients like Thunderbird, Outlook, or DeltaChat.
* **Automatic Discovery:** Discovers peers on the same LAN via multicast or connects to global static peers.
* **Native Privacy:** All traffic between nodes is end-to-end encrypted by Yggdrasil, with an additional layer of `age` encryption for the mail content.

---

## Quickstart

### 1. Installation

Install the binary using Go:

```bash
go install github.com/kaiyga/ygggo/cmd/yggmail@latest
export PATH=$PATH:`go env GOPATH`/bin

```

### 2. Configuration

Create your mailbox and set a password for your mail client:

```bash
yggmail -password

```

### 3. Execution

Start the node with multicast enabled or connect to a [public peer](https://publicpeers.neilalexander.dev/):

```bash
# Using a specific peer
yggmail -peer=tls://...

# Using multicast for local discovery
yggmail -multicast

```

*Your email address will be printed in the logs at startup.*

### 4. Client Setup

Connect your favorite mail client to the following local endpoints:

* **SMTP:** `localhost:1025` (No SSL/TLS, Plain Password)
* **IMAP:** `localhost:1143` (No SSL/TLS, Plain Password)
* **Username:** Your full Ygggo address.

---

## Parameters

| Switch | Description |
| --- | --- |
| `-peer=...` | Connect to a specific Yggdrasil node (e.g., `tls://...`). |
| `-multicast` | Enable multicast discovery for LAN nodes. |
| `-database` | Path to the `yggmail.db` file (default is current directory). |
| `-smtp` | Listening address/port for SMTP (default `127.0.0.1:1025`). |
| `-imap` | Listening address/port for IMAP (default `127.0.0.1:1143`). |
| `-password` | Set your IMAP/SMTP password interactively. |
| `-passwordhash` | Set the IMAP/SMTP password using a pre-generated bcrypt hash. |

---

## Important Notes

* **Uptime:** Ygggo must be running to receive inbound emails.
* **Closed Ecosystem:** You can only email other Ygggo/Yggmail users. It does not route to the public Internet (Gmail, etc.).
* **Client Compatibility:** You may need to enable "Allow insecure authentication" in your mail client since the local listeners do not use SSL/TLS yet.
* **Size Limit:** Emails are currently capped at default **10mb** max **4GB**.