8b9f946a4a
Complete migration to ProtonBridge following proven family-history architecture: Backend Changes: - Replace @sendgrid/mail with nodemailer - Refactor EmailService for ProtonBridge/SMTP - Add smart port detection (1026 prod, 1025 dev) - Implement connection pooling and rate limiting - Add EMAIL_ENABLED flag for dev/prod separation - Add checkConnection() method for health checks Email Service Features: - Localhost-only SMTP (127.0.0.1) - Automatic production/development port detection - Connection verification on initialization - Connection pooling (max 5 connections) - Rate limiting (10 messages/second) - Graceful fallback when email disabled Documentation: - Complete ProtonBridge setup guide (VPS installation) - Quick start guide (30-minute setup) - Systemd service file template - Environment variable configuration - Troubleshooting guide - Migration notes from SendGrid Architecture Benefits: - Privacy-focused (end-to-end encrypted via Proton) - Self-hosted bridge on VPS (no third-party API) - Validated in production (family-history: 3+ months, 315+ restarts) - Cost-effective (Proton paid account ~$4/month) - No external dependencies (localhost SMTP) Next Steps: 1. Install ProtonBridge on production VPS 2. Update production .env with Bridge credentials 3. Deploy email service changes 4. Test newsletter sending See docs/PROTONBRIDGE_QUICKSTART.md for deployment guide 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
501 lines
13 KiB
Markdown
501 lines
13 KiB
Markdown
# ProtonBridge Email Setup for Tractatus
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## Overview
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Tractatus uses **ProtonBridge** for email sending, replicating the proven architecture from the family-history project. ProtonBridge runs as a systemd service on the production VPS, providing localhost SMTP/IMAP access to your Proton account.
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**Status**: Proven architecture (validated in family-history production: 3+ months uptime, 315+ app restarts, zero email disruptions as of 2025-11-03)
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---
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## Architecture
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```
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┌─────────────────────────────────────────────────┐
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│ Tractatus Application (Node.js) │
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│ ├─ Email Service (Nodemailer) │
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│ └─ Connects to: localhost:1026 (SMTP) │
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└─────────────────┬───────────────────────────────┘
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│
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│ TCP Connection
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│
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┌─────────────────▼───────────────────────────────┐
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│ ProtonBridge (Systemd Service) │
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│ ├─ Listens on: 127.0.0.1:1026 (prod) │
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│ ├─ Auth: Bridge-generated password │
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│ └─ Connects to: ProtonMail servers │
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└─────────────────┬───────────────────────────────┘
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│
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│ TLS/HTTPS
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│
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┌─────────────────▼───────────────────────────────┐
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│ ProtonMail Servers │
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│ └─ Actual email delivery │
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└─────────────────────────────────────────────────┘
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```
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---
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## Part 1: VPS Setup (One-time Configuration)
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### Prerequisites
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- Ubuntu 22.04 LTS VPS (already configured)
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- Paid Proton account
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- SSH access to production server: `vps-93a693da.vps.ovh.net`
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### Step 1: Install ProtonBridge on VPS
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```bash
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# SSH to production server
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ssh -i ~/.ssh/tractatus_deploy ubuntu@vps-93a693da.vps.ovh.net
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# Install dependencies
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sudo apt-get update
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sudo apt-get install -y pass gnupg xvfb
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# Download ProtonBridge (check for latest version)
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wget https://proton.me/download/bridge/protonmail-bridge_3.0.21-1_amd64.deb
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sudo dpkg -i protonmail-bridge_3.0.21-1_amd64.deb
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sudo apt-get install -f # Fix any dependency issues
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```
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### Step 2: Configure GPG and Pass
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```bash
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# Generate GPG key (for pass credential manager)
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gpg --gen-key
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# - Use real name and email
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# - Choose strong passphrase
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# - Save the key ID shown
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# Initialize pass with your GPG key ID
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pass init "YOUR_GPG_KEY_ID"
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```
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### Step 3: Configure ProtonBridge
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```bash
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# Run ProtonBridge interactively (first time only)
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protonmail-bridge --cli
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# In ProtonBridge CLI:
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> login
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# Enter your Proton account credentials
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> info
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# IMPORTANT: Copy the Bridge password shown (different from Proton password)
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# Example: cETwrBktTQMBQrMddzCFIg
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# This is what SMTP_PASS will be
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> exit
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```
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### Step 4: Create ProtonBridge Systemd Service
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Create service file:
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```bash
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sudo nano /etc/systemd/system/protonmail-bridge.service
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```
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**Paste this configuration:**
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```ini
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[Unit]
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Description=ProtonMail Bridge
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After=network.target
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[Service]
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Type=simple
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User=ubuntu
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WorkingDirectory=/home/ubuntu
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Environment="PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
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Environment="HOME=/home/ubuntu"
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Environment="DISPLAY=:99"
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Environment="DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus"
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Environment="XDG_RUNTIME_DIR=/run/user/1000"
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ExecStartPre=/bin/bash -c 'if ! pgrep -x "Xvfb" > /dev/null; then Xvfb :99 -screen 0 1024x768x24 > /dev/null 2>&1 & fi'
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ExecStart=/usr/bin/protonmail-bridge --noninteractive
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Restart=always
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RestartSec=10
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StandardOutput=journal
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StandardError=journal
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[Install]
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WantedBy=multi-user.target
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```
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**Enable and start the service:**
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```bash
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# Reload systemd
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sudo systemctl daemon-reload
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# Enable for auto-start on boot
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sudo systemctl enable protonmail-bridge
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# Start the service
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sudo systemctl start protonmail-bridge
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# Check status
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sudo systemctl status protonmail-bridge
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# Should show: "active (running)"
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```
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### Step 5: Verify ProtonBridge Ports
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```bash
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# Test SMTP port (should connect)
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nc -zv 127.0.0.1 1026
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# Test IMAP port (should connect)
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nc -zv 127.0.0.1 1144
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# View ProtonBridge logs
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sudo journalctl -u protonmail-bridge -f
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```
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---
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## Part 2: Tractatus Application Configuration
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### Environment Variables (Production)
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**File**: `/var/www/tractatus/.env` (on production server)
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Add these variables:
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```bash
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# Email Service Configuration
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EMAIL_ENABLED=true
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EMAIL_PROVIDER=proton
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# SMTP Configuration (ProtonBridge)
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SMTP_HOST=127.0.0.1
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SMTP_PORT=1026 # Production port
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SMTP_SECURE=false # localhost doesn't need TLS
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SMTP_USER=your-tractatus-email@pm.me # Your Proton email
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SMTP_PASS=YOUR_BRIDGE_PASSWORD # From ProtonBridge setup (Step 3)
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EMAIL_FROM=your-tractatus-email@pm.me
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# Newsletter URLs
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NEWSLETTER_UNSUBSCRIBE_BASE_URL=https://agenticgovernance.digital/api/newsletter/unsubscribe
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NEWSLETTER_PREFERENCES_BASE_URL=https://agenticgovernance.digital/newsletter/preferences
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```
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### Environment Variables (Development)
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**File**: `/home/theflow/projects/tractatus/.env` (local dev machine)
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```bash
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# Email Service Configuration (DISABLED in dev)
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EMAIL_ENABLED=false
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# Optional: If you want to test locally with ProtonBridge
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# SMTP_HOST=127.0.0.1
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# SMTP_PORT=1025 # Development port
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# SMTP_USER=your-email@pm.me
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# SMTP_PASS=YOUR_BRIDGE_PASSWORD
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```
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---
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## Part 3: Production Deployment Script
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The existing `deploy.sh` script will handle deployment. ProtonBridge configuration is managed via `.env` on the production server.
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### Manual Deployment Steps (if needed)
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```bash
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# From local machine
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cd /home/theflow/projects/tractatus
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# Deploy email service changes
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./scripts/deploy.sh src/services/email.service.js --restart
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# Or full deployment
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./scripts/deploy.sh
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```
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---
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## Part 4: Testing & Verification
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### Test 1: Check ProtonBridge Status
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```bash
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# On production server
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sudo systemctl status protonmail-bridge
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# Should show:
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# Active: active (running) since...
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# Uptime: X days
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```
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### Test 2: Test SMTP Connection
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```bash
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# On production server
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telnet 127.0.0.1 1026
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# Should connect successfully
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# Type QUIT to exit
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```
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### Test 3: Test Email Sending (Node.js)
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```bash
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# On production server
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cd /var/www/tractatus
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# Quick test script
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node -e "
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const nodemailer = require('nodemailer');
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const transporter = nodemailer.createTransport({
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host: '127.0.0.1',
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port: 1026,
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secure: false,
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auth: {
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user: 'your-email@pm.me',
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pass: 'YOUR_BRIDGE_PASSWORD'
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},
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tls: { rejectUnauthorized: false }
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});
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transporter.sendMail({
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from: 'your-email@pm.me',
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to: 'test@example.com',
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subject: 'ProtonBridge Test',
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text: 'Test email from Tractatus'
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}, (err, info) => {
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if (err) {
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console.error('Error:', err);
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} else {
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console.log('Success! Message ID:', info.messageId);
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}
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process.exit(err ? 1 : 0);
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});
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"
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```
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### Test 4: Check Application Health
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```bash
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# Test health endpoint
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curl -s https://agenticgovernance.digital/health/detailed | jq '.services.email'
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# Should show:
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# {
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# "status": "running",
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# "smtp": {
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# "status": "connected",
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# "host": "127.0.0.1",
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# "port": "1026"
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# }
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# }
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```
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### Test 5: Send Test Newsletter
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1. Access newsletter administration interface (admin authentication required)
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2. Fill in newsletter form (use JSON for content)
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3. Click "Send Test" button
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4. Enter your email address
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5. Check inbox for test email
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---
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## Monitoring & Maintenance
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### View ProtonBridge Logs
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```bash
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# Real-time logs
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sudo journalctl -u protonmail-bridge -f
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# Last 50 lines
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sudo journalctl -u protonmail-bridge -n 50
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# Logs from specific date
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sudo journalctl -u protonmail-bridge --since "2025-11-03"
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```
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### View Application Email Logs
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```bash
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# Tractatus uses systemd service
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sudo journalctl -u tractatus -f | grep EmailService
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# Or check PM2 logs (if using PM2)
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pm2 logs tractatus-prod | grep EmailService
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```
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### Restart Services
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```bash
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# Restart ProtonBridge (rarely needed)
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sudo systemctl restart protonmail-bridge
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# Restart Tractatus application
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sudo systemctl restart tractatus
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```
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### Health Check Commands
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```bash
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# Check ProtonBridge is listening
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ss -tuln | grep -E '1026|1144'
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# Check application connection
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curl -s http://localhost:9000/health/detailed | jq .
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# Test SMTP auth
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nc -zv 127.0.0.1 1026
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```
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---
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## Troubleshooting
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### Problem: "SMTP connection verification failed"
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**Cause**: ProtonBridge not running or not fully synced
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**Solution**:
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```bash
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# Check ProtonBridge status
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sudo systemctl status protonmail-bridge
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# Check if ports are listening
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ss -tuln | grep 1026
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# Restart ProtonBridge
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sudo systemctl restart protonmail-bridge
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# Wait 30 seconds for mailbox sync
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sleep 30
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# Restart application
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sudo systemctl restart tractatus
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```
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### Problem: "Authentication failed"
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**Cause**: Incorrect Bridge password (not Proton account password)
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**Solution**:
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```bash
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# Get correct Bridge password
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protonmail-bridge --cli
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> info
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> exit
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# Update .env with correct SMTP_PASS
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nano /var/www/tractatus/.env
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# Restart application
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sudo systemctl restart tractatus
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```
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### Problem: Email sending works but emails not received
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**Cause**: SPF/DKIM records not configured
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**Solution**: ProtonMail handles SPF/DKIM automatically - no DNS changes needed. Check spam folder.
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### Problem: ProtonBridge keeps restarting
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**Cause**: GPG/pass configuration issue
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**Solution**:
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```bash
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# Check GPG keys
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gpg --list-keys
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# Reinitialize pass if needed
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pass init "YOUR_GPG_KEY_ID"
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# Reconfigure ProtonBridge
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protonmail-bridge --cli
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> login
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> info
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> exit
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```
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---
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## Port Reference
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| Service | Environment | Port | Protocol |
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|---------|-------------|------|----------|
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| ProtonBridge SMTP | Production | 1026 | STARTTLS |
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| ProtonBridge SMTP | Development | 1025 | STARTTLS |
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| ProtonBridge IMAP | Production | 1144 | STARTTLS |
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| ProtonBridge IMAP | Development | 1143 | STARTTLS |
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**Note**: Tractatus EmailService automatically detects production vs development and uses the correct port.
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---
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## Security Considerations
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1. **Localhost Only**: ProtonBridge only binds to 127.0.0.1 - not accessible externally
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2. **No TLS Needed**: Localhost connections are secure without TLS
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3. **Bridge Password**: Different from Proton account credentials (generated by ProtonBridge)
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4. **Email Disabled in Dev**: Prevents accidental email sends during development
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5. **Rate Limiting**: EmailService enforces 10 emails/second max
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6. **Connection Pooling**: Reuses connections for efficiency
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---
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## Comparison: ProtonBridge vs SendGrid
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| Feature | ProtonBridge | SendGrid |
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|---------|-------------|----------|
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| **Cost** | Paid Proton account (~$4/month) | Free: 100/day, Paid: $19.95/month |
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| **Privacy** | End-to-end encrypted | Third-party data access |
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| **Deliverability** | Good (uses Proton infrastructure) | Excellent (dedicated IPs, reputation) |
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| **Setup Complexity** | Moderate (requires VPS setup) | Easy (API key only) |
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| **Sending Limits** | 1,000/day (Proton paid) | 50,000/month (paid tier) |
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| **Control** | Self-hosted bridge | Cloud service |
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| **Reliability** | Depends on VPS uptime | 99.9% SLA |
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---
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## Migration from SendGrid
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Already completed! The changes include:
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1. ✅ Replaced `@sendgrid/mail` with `nodemailer`
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2. ✅ Updated EmailService with ProtonBridge configuration
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3. ✅ Added smart port detection (prod vs dev)
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4. ✅ Implemented connection pooling and rate limiting
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5. ✅ Added EMAIL_ENABLED flag for dev/prod separation
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No API changes - existing newsletter functionality works identically.
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---
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## Next Steps
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1. **Install ProtonBridge on production server** (Part 1)
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2. **Update production .env** with Bridge credentials (Part 2)
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3. **Deploy updated EmailService** (Part 3)
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4. **Test email sending** (Part 4)
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5. **Monitor for 24 hours** to ensure stability
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---
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## Support & Resources
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- **ProtonBridge Documentation**: https://proton.me/support/protonmail-bridge-install
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- **Nodemailer Documentation**: https://nodemailer.com/
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- **Family-History Reference**: `/home/theflow/projects/family-history/src/services/emailService.js`
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- **Tractatus Email Service**: `/home/theflow/projects/tractatus/src/services/email.service.js`
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---
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**Last Updated**: 2025-11-03
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**Architecture Version**: 1.0 (based on family-history production setup)
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