# Sendy + n8n Integration Guide for Rust Meetup 2025\n\n## Overview\n\nComplete integration guide for connecting Sendy (self-hosted email marketing) with your event management stack using n8n for workflow automation on Kubernetes.\n\n## Architecture Overview\n\n```plaintext\nEvent Registration Flow:\nQR Code/Landing Page → Typebot → n8n → Sendy + Baserow + Formbricks\n                                ↓\nLive Event Polls → Claper → n8n → Sendy Segments + Analytics\n                                ↓\nPost-Event Follow-up → Automated Email Sequences + Survey Distribution\n```\n\n## Sendy API Integration\n\n### Authentication & Setup\n\n```bash\n# Sendy API Configuration\nSENDY_API_KEY="your-api-key"\nSENDY_INSTALLATION_URL="https://sendy.yourdomain.com"\nSENDY_LIST_ID="your-list-id"\n```\n\n### Key API Endpoints\n\n```javascript\n// Subscribe endpoint\nPOST /api/subscribe.php\n{\n  "api_key": "your-api-key",\n  "email": "attendee@example.com",\n  "list": "list-id",\n  "name": "Attendee Name",\n  "custom_fields": {\n    "registration_source": "rust-meetup-2025",\n    "interest_level": "high",\n    "experience": "intermediate"\n  }\n}\n\n// Unsubscribe endpoint\nPOST /api/unsubscribe.php\n\n// Get subscriber status\nPOST /api/subscriber-status.php\n\n// Create campaign\nPOST /api/create-send.php\n```\n\n## n8n Kubernetes Deployment\n\n### Namespace and ConfigMap\n\n```yaml\n# n8n-namespace.yaml\napiVersion: v1\nkind: Namespace\nmetadata:\n  name: n8n-automation\n  labels:\n    name: n8n-automation\n    app: event-automation\n\n---\n# n8n-config.yaml\napiVersion: v1\nkind: ConfigMap\nmetadata:\n  name: n8n-config\n  namespace: n8n-automation\ndata:\n  N8N_BASIC_AUTH_ACTIVE: "true"\n  N8N_BASIC_AUTH_USER: "admin"\n  N8N_HOST: "n8n.rust-meetup.local"\n  N8N_PORT: "5678"\n  N8N_PROTOCOL: "https"\n  WEBHOOK_URL: "https://n8n.rust-meetup.local"\n  GENERIC_TIMEZONE: "Europe/Madrid"\n  N8N_METRICS: "true"\n  N8N_LOG_LEVEL: "info"\n  N8N_EDITOR_BASE_URL: "https://n8n.rust-meetup.local"\n  N8N_DISABLE_UI: "false"\n  N8N_PERSONALIZATION_ENABLED: "false"\n  N8N_VERSION_NOTIFICATIONS_ENABLED: "false"\n  N8N_DIAGNOSTICS_ENABLED: "false"\n  N8N_PUBLIC_API_DISABLED: "false"\n  EXECUTIONS_PROCESS: "main"\n  EXECUTIONS_MODE: "regular"\n  QUEUE_BULL_REDIS_HOST: "redis-cluster"\n  QUEUE_BULL_REDIS_PORT: "6379"\n  DB_TYPE: "postgresdb"\n  DB_POSTGRESDB_HOST: "postgresql-ha-primary"\n  DB_POSTGRESDB_PORT: "5432"\n  DB_POSTGRESDB_DATABASE: "n8n"\n  DB_POSTGRESDB_USER: "n8n"\n```\n\n### Secrets\n\n```yaml\n# n8n-secrets.yaml\napiVersion: v1\nkind: Secret\nmetadata:\n  name: n8n-secrets\n  namespace: n8n-automation\ntype: Opaque\nstringData:\n  N8N_BASIC_AUTH_PASSWORD: "secure-password-here"\n  DB_POSTGRESDB_PASSWORD: "postgres-password"\n  ENCRYPTION_KEY: "your-encryption-key-32-chars-long"\n  # Sendy Configuration\n  SENDY_API_KEY: "your-sendy-api-key"\n  SENDY_INSTALLATION_URL: "https://sendy.yourdomain.com"\n  SENDY_LIST_ID: "rust-meetup-list-id"\n  # Integration Keys\n  TYPEBOT_API_KEY: "your-typebot-api-key"\n  FORMBRICKS_API_KEY: "your-formbricks-api-key"\n  BASEROW_API_KEY: "your-baserow-api-key"\n  CLAPER_WEBHOOK_SECRET: "claper-webhook-secret"\n```\n\n### PersistentVolumeClaim\n\n```yaml\n# n8n-storage.yaml\napiVersion: v1\nkind: PersistentVolumeClaim\nmetadata:\n  name: n8n-data\n  namespace: n8n-automation\nspec:\n  accessModes:\n    - ReadWriteOnce\n  resources:\n    requests:\n      storage: 10Gi\n  storageClassName: fast-ssd\n```\n\n### Deployment\n\n```yaml\n# n8n-deployment.yaml\napiVersion: apps/v1\nkind: Deployment\nmetadata:\n  name: n8n\n  namespace: n8n-automation\n  labels:\n    app: n8n\n    version: v1\nspec:\n  replicas: 1\n  selector:\n    matchLabels:\n      app: n8n\n      version: v1\n  template:\n    metadata:\n      labels:\n        app: n8n\n        version: v1\n    spec:\n      containers:\n      - name: n8n\n        image: n8nio/n8n:1.57.0\n        ports:\n        - containerPort: 5678\n          name: http\n        envFrom:\n        - configMapRef:\n            name: n8n-config\n        - secretRef:\n            name: n8n-secrets\n        volumeMounts:\n        - name: n8n-data\n          mountPath: /home/node/.n8n\n        resources:\n          requests:\n            memory: "512Mi"\n            cpu: "250m"\n          limits:\n            memory: "2Gi"\n            cpu: "1000m"\n        livenessProbe:\n          httpGet:\n            path: /healthz\n            port: 5678\n          initialDelaySeconds: 60\n          periodSeconds: 30\n        readinessProbe:\n          httpGet:\n            path: /healthz\n            port: 5678\n          initialDelaySeconds: 30\n          periodSeconds: 10\n        securityContext:\n          runAsNonRoot: true\n          runAsUser: 1000\n          allowPrivilegeEscalation: false\n          readOnlyRootFilesystem: false\n      volumes:\n      - name: n8n-data\n        persistentVolumeClaim:\n          claimName: n8n-data\n      securityContext:\n        fsGroup: 1000\n```\n\n### Service\n\n```yaml\n# n8n-service.yaml\napiVersion: v1\nkind: Service\nmetadata:\n  name: n8n\n  namespace: n8n-automation\n  labels:\n    app: n8n\nspec:\n  selector:\n    app: n8n\n  ports:\n  - name: http\n    port: 80\n    targetPort: 5678\n    protocol: TCP\n  type: ClusterIP\n```\n\n### Ingress (Traditional)\n\n```yaml\n# n8n-ingress.yaml\napiVersion: networking.k8s.io/v1\nkind: Ingress\nmetadata:\n  name: n8n-ingress\n  namespace: n8n-automation\n  annotations:\n    kubernetes.io/ingress.class: "nginx"\n    nginx.ingress.kubernetes.io/ssl-redirect: "true"\n    nginx.ingress.kubernetes.io/force-ssl-redirect: "true"\n    nginx.ingress.kubernetes.io/proxy-body-size: "50m"\n    nginx.ingress.kubernetes.io/proxy-connect-timeout: "300"\n    nginx.ingress.kubernetes.io/proxy-send-timeout: "300"\n    nginx.ingress.kubernetes.io/proxy-read-timeout: "300"\n    cert-manager.io/cluster-issuer: "letsencrypt-prod"\nspec:\n  tls:\n  - hosts:\n    - n8n.rust-meetup.local\n    secretName: n8n-tls\n  rules:\n  - host: n8n.rust-meetup.local\n    http:\n      paths:\n      - path: /\n        pathType: Prefix\n        backend:\n          service:\n            name: n8n\n            port:\n              number: 80\n```\n\n### Istio VirtualService\n\n```yaml\n# n8n-virtualservice.yaml\napiVersion: networking.istio.io/v1beta1\nkind: VirtualService\nmetadata:\n  name: n8n-vs\n  namespace: n8n-automation\nspec:\n  hosts:\n  - n8n.rust-meetup.local\n  gateways:\n  - rust-meetup-gateway\n  http:\n  - match:\n    - uri:\n        prefix: /\n    route:\n    - destination:\n        host: n8n.n8n-automation.svc.cluster.local\n        port:\n          number: 80\n    timeout: 300s\n    headers:\n      request:\n        add:\n          X-Forwarded-Proto: "https"\n          X-Forwarded-For: "%DOWNSTREAM_REMOTE_ADDRESS%"\n\n---\napiVersion: networking.istio.io/v1beta1\nkind: DestinationRule\nmetadata:\n  name: n8n-dr\n  namespace: n8n-automation\nspec:\n  host: n8n.n8n-automation.svc.cluster.local\n  trafficPolicy:\n    connectionPool:\n      tcp:\n        maxConnections: 50\n      http:\n        http1MaxPendingRequests: 100\n        maxRequestsPerConnection: 10\n    outlierDetection:\n      consecutiveErrors: 3\n      interval: 30s\n      baseEjectionTime: 30s\n```\n\n## n8n Workflow Templates\n\n### 1. Event Registration Workflow\n\n```json\n{\n  "name": "Rust Meetup Registration Flow",\n  "nodes": [\n    {\n      "parameters": {\n        "httpMethod": "POST",\n        "path": "registration",\n        "responseMode": "responseNode"\n      },\n      "id": "webhook-registration",\n      "name": "Registration Webhook",\n      "type": "n8n-nodes-base.webhook",\n      "position": [240, 300]\n    },\n    {\n      "parameters": {\n        "url": "={{ $env.SENDY_INSTALLATION_URL }}/api/subscribe.php",\n        "sendHeaders": true,\n        "headerParameters": {\n          "parameters": [\n            {\n              "name": "Content-Type",\n              "value": "application/x-www-form-urlencoded"\n            }\n          ]\n        },\n        "sendBody": true,\n        "bodyParameters": {\n          "parameters": [\n            {\n              "name": "api_key",\n              "value": "={{ $env.SENDY_API_KEY }}"\n            },\n            {\n              "name": "email",\n              "value": "={{ $json.email }}"\n            },\n            {\n              "name": "list",\n              "value": "={{ $env.SENDY_LIST_ID }}"\n            },\n            {\n              "name": "name",\n              "value": "={{ $json.name }}"\n            },\n            {\n              "name": "custom_fields",\n              "value": "{{ JSON.stringify({ registration_source: 'rust-meetup-2025', interest_level: $json.interest_level, experience: $json.experience, registration_date: new Date().toISOString() }) }}"\n            }\n          ]\n        }\n      },\n      "id": "sendy-subscribe",\n      "name": "Add to Sendy List",\n      "type": "n8n-nodes-base.httpRequest",\n      "position": [460, 300]\n    },\n    {\n      "parameters": {\n        "url": "={{ $env.BASEROW_API_URL }}/api/database/rows/table/{{ $env.BASEROW_ATTENDEES_TABLE_ID }}/",\n        "sendHeaders": true,\n        "headerParameters": {\n          "parameters": [\n            {\n              "name": "Authorization",\n              "value": "Token {{ $env.BASEROW_API_KEY }}"\n            }\n          ]\n        },\n        "sendBody": true,\n        "bodyParameters": {\n          "parameters": [\n            {\n              "name": "name",\n              "value": "={{ $json.name }}"\n            },\n            {\n              "name": "email",\n              "value": "={{ $json.email }}"\n            },\n            {\n              "name": "registration_source",\n              "value": "typebot"\n            },\n            {\n              "name": "registration_date",\n              "value": "={{ new Date().toISOString() }}"\n            },\n            {\n              "name": "status",\n              "value": "registered"\n            }\n          ]\n        }\n      },\n      "id": "baserow-create",\n      "name": "Save to Baserow",\n      "type": "n8n-nodes-base.httpRequest",\n      "position": [680, 300]\n    }\n  ],\n  "connections": {\n    "Registration Webhook": {\n      "main": [\n        [\n          {\n            "node": "Add to Sendy List",\n            "type": "main",\n            "index": 0\n          }\n        ]\n      ]\n    },\n    "Add to Sendy List": {\n      "main": [\n        [\n          {\n            "node": "Save to Baserow",\n            "type": "main",\n            "index": 0\n          }\n        ]\n      ]\n    }\n  }\n}\n```\n\n### 2. Pre-Event Email Sequence\n\n```json\n{\n  "name": "Pre-Event Email Automation",\n  "nodes": [\n    {\n      "parameters": {\n        "rule": {\n          "interval": [\n            {\n              "field": "cronExpression",\n              "value": "0 9 * * *"\n            }\n          ]\n        }\n      },\n      "id": "daily-trigger",\n      "name": "Daily Check Trigger",\n      "type": "n8n-nodes-base.cron",\n      "position": [240, 300]\n    },\n    {\n      "parameters": {\n        "url": "={{ $env.SENDY_INSTALLATION_URL }}/api/create-send.php",\n        "sendBody": true,\n        "bodyParameters": {\n          "parameters": [\n            {\n              "name": "api_key",\n              "value": "={{ $env.SENDY_API_KEY }}"\n            },\n            {\n              "name": "from_name",\n              "value": "Rust Meetup Team"\n            },\n            {\n              "name": "from_email",\n              "value": "hello@rust-meetup.com"\n            },\n            {\n              "name": "reply_to",\n              "value": "hello@rust-meetup.com"\n            },\n            {\n              "name": "subject",\n              "value": "¡Solo quedan {{ $json.days_remaining }} días para el Rust Meetup!"\n            },\n            {\n              "name": "html_text",\n              "value": "{{ $json.email_template }}"\n            },\n            {\n              "name": "list_ids",\n              "value": "={{ $env.SENDY_LIST_ID }}"\n            },\n            {\n              "name": "send_campaign",\n              "value": "1"\n            }\n          ]\n        }\n      },\n      "id": "send-reminder",\n      "name": "Send Reminder Email",\n      "type": "n8n-nodes-base.httpRequest",\n      "position": [680, 300]\n    }\n  ]\n}\n```\n\n### 3. Live Event Integration\n\n```json\n{\n  "name": "Live Event Poll Integration",\n  "nodes": [\n    {\n      "parameters": {\n        "httpMethod": "POST",\n        "path": "poll-response",\n        "responseMode": "responseNode"\n      },\n      "id": "poll-webhook",\n      "name": "Poll Response Webhook",\n      "type": "n8n-nodes-base.webhook",\n      "position": [240, 300]\n    },\n    {\n      "parameters": {\n        "url": "={{ $env.BASEROW_API_URL }}/api/database/rows/table/{{ $env.BASEROW_LIVE_ENGAGEMENT_TABLE_ID }}/",\n        "sendHeaders": true,\n        "headerParameters": {\n          "parameters": [\n            {\n              "name": "Authorization",\n              "value": "Token {{ $env.BASEROW_API_KEY }}"\n            }\n          ]\n        },\n        "sendBody": true,\n        "bodyParameters": {\n          "parameters": [\n            {\n              "name": "attendee_email",\n              "value": "={{ $json.email }}"\n            },\n            {\n              "name": "poll_question",\n              "value": "={{ $json.question }}"\n            },\n            {\n              "name": "response",\n              "value": "={{ $json.answer }}"\n            },\n            {\n              "name": "timestamp",\n              "value": "={{ new Date().toISOString() }}"\n            },\n            {\n              "name": "engagement_score",\n              "value": "={{ $json.engagement_points || 10 }}"\n            }\n          ]\n        }\n      },\n      "id": "save-engagement",\n      "name": "Save Engagement Data",\n      "type": "n8n-nodes-base.httpRequest",\n      "position": [460, 300]\n    },\n    {\n      "parameters": {\n        "conditions": {\n          "string": [\n            {\n              "value1": "={{ $json.engagement_score }}",\n              "operation": "largerEqual",\n              "value2": "50"\n            }\n          ]\n        }\n      },\n      "id": "check-engagement",\n      "name": "High Engagement?",\n      "type": "n8n-nodes-base.if",\n      "position": [680, 300]\n    },\n    {\n      "parameters": {\n        "url": "={{ $env.SENDY_INSTALLATION_URL }}/api/subscribe.php",\n        "sendBody": true,\n        "bodyParameters": {\n          "parameters": [\n            {\n              "name": "api_key",\n              "value": "={{ $env.SENDY_API_KEY }}"\n            },\n            {\n              "name": "email",\n              "value": "={{ $json.email }}"\n            },\n            {\n              "name": "list",\n              "value": "={{ $env.SENDY_HIGH_ENGAGEMENT_LIST_ID }}"\n            },\n            {\n              "name": "custom_fields",\n              "value": "{{ JSON.stringify({ segment: 'high_engagement', last_interaction: new Date().toISOString() }) }}"\n            }\n          ]\n        }\n      },\n      "id": "segment-high-engagement",\n      "name": "Add to High Engagement Segment",\n      "type": "n8n-nodes-base.httpRequest",\n      "position": [900, 200]\n    }\n  ]\n}\n```\n\n## QR Code Integration Strategy\n\n### 1. Dynamic QR Code Generation\n\n```javascript\n// QR Code Generation Service\nconst QRCode = require('qrcode');\n\nasync function generateEventQR(attendeeEmail, source = 'general') {\n  const registrationUrl = `https://typebot.rust-meetup.local/rust-meetup-registration?email=${encodeURIComponent(attendeeEmail)}&source=${source}&utm_campaign=rust-meetup-2025`;\n\n  const qrOptions = {\n    errorCorrectionLevel: 'M',\n    type: 'image/png',\n    quality: 0.92,\n    margin: 1,\n    color: {\n      dark: '#000000',\n      light: '#FFFFFF',\n    },\n    width: 256\n  };\n\n  return await QRCode.toDataURL(registrationUrl, qrOptions);\n}\n```\n\n### 2. Landing Page Integration\n\n```html\n<!-- Landing Page Template -->\n<!DOCTYPE html>\n<html lang="es">\n<head>\n    <meta charset="UTF-8">\n    <meta name="viewport" content="width=device-width, initial-scale=1.0">\n    <title>Rust Meetup 2025 - Registro</title>\n    <meta name="description" content="Únete al Rust Meetup 2025: Infrastructure Automation with Rust, Nushell & KCL">\n    <link rel="canonical" href="https://rust-meetup.local/registro">\n\n    <!-- Open Graph -->\n    <meta property="og:title" content="Rust Meetup 2025 - Infrastructure Automation">\n    <meta property="og:description" content="Aprende sobre automatización de infraestructura con Rust, Nushell y KCL">\n    <meta property="og:image" content="https://rust-meetup.local/images/meetup-banner.jpg">\n    <meta property="og:url" content="https://rust-meetup.local/registro">\n\n    <style>\n        body {\n            font-family: 'Inter', sans-serif;\n            margin: 0;\n            padding: 20px;\n            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);\n            min-height: 100vh;\n        }\n        .container {\n            max-width: 600px;\n            margin: 0 auto;\n            background: white;\n            padding: 40px;\n            border-radius: 12px;\n            box-shadow: 0 10px 25px rgba(0,0,0,0.1);\n        }\n        .logo {\n            text-align: center;\n            margin-bottom: 30px;\n        }\n        .rust-logo {\n            width: 80px;\n            height: 80px;\n            margin-bottom: 20px;\n        }\n        h1 {\n            color: #2c3e50;\n            text-align: center;\n            margin-bottom: 10px;\n            font-size: 2.2em;\n        }\n        .subtitle {\n            text-align: center;\n            color: #7f8c8d;\n            margin-bottom: 30px;\n            font-size: 1.1em;\n        }\n        .typebot-container {\n            width: 100%;\n            height: 600px;\n            border: none;\n            border-radius: 8px;\n            box-shadow: 0 4px 6px rgba(0,0,0,0.1);\n        }\n        .event-info {\n            background: #f8f9fa;\n            padding: 20px;\n            border-radius: 8px;\n            margin-bottom: 30px;\n        }\n        .info-item {\n            display: flex;\n            align-items: center;\n            margin-bottom: 10px;\n        }\n        .info-icon {\n            width: 20px;\n            margin-right: 10px;\n            color: #e74c3c;\n        }\n    </style>\n</head>\n<body>\n    <div class="container">\n        <div class="logo">\n            <img src="/images/rust-logo.svg" alt="Rust Logo" class="rust-logo">\n            <h1>Rust Meetup 2025</h1>\n            <p class="subtitle">Infrastructure Automation with Rust, Nushell & KCL</p>\n        </div>\n\n        <div class="event-info">\n            <div class="info-item">\n                <span class="info-icon">📅</span>\n                <span><strong>Fecha:</strong> 15 de Marzo, 2025</span>\n            </div>\n            <div class="info-item">\n                <span class="info-icon">🕕</span>\n                <span><strong>Hora:</strong> 18:00 - 21:00 CET</span>\n            </div>\n            <div class="info-item">\n                <span class="info-icon">📍</span>\n                <span><strong>Lugar:</strong> Tech Hub Madrid</span>\n            </div>\n            <div class="info-item">\n                <span class="info-icon">👥</span>\n                <span><strong>Capacidad:</strong> 100 asistentes</span>\n            </div>\n        </div>\n\n        <!-- Typebot Integration -->\n        <iframe\n            src="https://typebot.rust-meetup.local/rust-meetup-registration?utm_source=landing&utm_campaign=rust-meetup-2025"\n            class="typebot-container"\n            title="Registro Rust Meetup 2025">\n        </iframe>\n    </div>\n\n    <!-- Analytics -->\n    <script>\n        // Track page view\n        fetch('/api/analytics/pageview', {\n            method: 'POST',\n            headers: { 'Content-Type': 'application/json' },\n            body: JSON.stringify({\n                page: 'landing-registration',\n                timestamp: new Date().toISOString(),\n                referrer: document.referrer,\n                utm_source: new URLSearchParams(window.location.search).get('utm_source') || 'direct'\n            })\n        });\n    </script>\n</body>\n</html>\n```\n\n## Email Template System\n\n### Welcome Email Template\n\n```html\n<!-- Sendy Email Template -->\n<html>\n<head>\n    <meta charset="UTF-8">\n    <meta name="viewport" content="width=device-width, initial-scale=1.0">\n    <title>¡Bienvenido al Rust Meetup 2025!</title>\n</head>\n<body style="margin:0;padding:0;font-family:Arial,sans-serif;background-color:#f4f4f4;">\n    <table width="100%" cellpadding="0" cellspacing="0" style="background-color:#f4f4f4;">\n        <tr>\n            <td align="center">\n                <table width="600" cellpadding="0" cellspacing="0" style="background-color:#ffffff;margin:20px auto;border-radius:8px;overflow:hidden;box-shadow:0 4px 6px rgba(0,0,0,0.1);">\n                    <!-- Header -->\n                    <tr>\n                        <td style="background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);padding:40px;text-align:center;">\n                            <img src="https://rust-meetup.local/images/rust-logo.png" alt="Rust Logo" style="width:60px;height:60px;margin-bottom:20px;">\n                            <h1 style="color:#ffffff;margin:0;font-size:28px;">¡Registro Confirmado!</h1>\n                            <p style="color:#ffffff;margin:10px 0 0 0;font-size:16px;">Rust Meetup 2025</p>\n                        </td>\n                    </tr>\n\n                    <!-- Content -->\n                    <tr>\n                        <td style="padding:40px;">\n                            <h2 style="color:#2c3e50;margin:0 0 20px 0;">Hola [name],</h2>\n\n                            <p style="color:#34495e;font-size:16px;line-height:1.6;margin:0 0 20px 0;">\n                                ¡Gracias por registrarte en el <strong>Rust Meetup 2025</strong>! Estamos emocionados de tenerte con nosotros para explorar Infrastructure Automation with Rust, Nushell & KCL.\n                            </p>\n\n                            <div style="background:#f8f9fa;padding:25px;border-radius:8px;margin:25px 0;">\n                                <h3 style="color:#2c3e50;margin:0 0 15px 0;font-size:18px;">📅 Detalles del Evento</h3>\n                                <p style="margin:5px 0;color:#34495e;"><strong>Fecha:</strong> 15 de Marzo, 2025</p>\n                                <p style="margin:5px 0;color:#34495e;"><strong>Hora:</strong> 18:00 - 21:00 CET</p>\n                                <p style="margin:5px 0;color:#34495e;"><strong>Lugar:</strong> Tech Hub Madrid</p>\n                                <p style="margin:5px 0;color:#34495e;"><strong>Dirección:</strong> Calle Innovation 42, Madrid</p>\n                            </div>\n\n                            <div style="background:#e8f5e8;border-left:4px solid #27ae60;padding:20px;margin:25px 0;">\n                                <h4 style="color:#27ae60;margin:0 0 10px 0;">🎯 Lo que aprenderás:</h4>\n                                <ul style="color:#34495e;margin:0;padding-left:20px;">\n                                    <li>Automatización de infraestructura con Rust</li>\n                                    <li>Uso avanzado de Nushell para DevOps</li>\n                                    <li>Configuración declarativa con KCL</li>\n                                    <li>Mejores prácticas de Cloud Native</li>\n                                </ul>\n                            </div>\n\n                            <div style="text-align:center;margin:30px 0;">\n                                <a href="https://calendar.rust-meetup.local/add-event?token=[calendar_token]"\n                                   style="background:#e74c3c;color:#ffffff;text-decoration:none;padding:15px 30px;border-radius:5px;font-weight:bold;display:inline-block;">\n                                    📅 Añadir al Calendario\n                                </a>\n                            </div>\n\n                            <div style="background:#fff3cd;border:1px solid #ffeaa7;padding:20px;border-radius:8px;margin:25px 0;">\n                                <h4 style="color:#856404;margin:0 0 10px 0;">📋 Antes del evento:</h4>\n                                <p style="color:#856404;margin:0;">\n                                    Te enviaremos un cuestionario previo para personalizar mejor la experiencia.\n                                    ¡Mantente atento a tu email!\n                                </p>\n                            </div>\n\n                            <p style="color:#34495e;font-size:16px;line-height:1.6;margin:25px 0 0 0;">\n                                Si tienes alguna pregunta, no dudes en responder este email.\n                            </p>\n\n                            <p style="color:#34495e;font-size:16px;line-height:1.6;margin:20px 0 0 0;">\n                                ¡Nos vemos pronto!<br>\n                                <strong>El equipo de Rust Meetup</strong>\n                            </p>\n                        </td>\n                    </tr>\n\n                    <!-- Footer -->\n                    <tr>\n                        <td style="background:#2c3e50;padding:30px;text-align:center;">\n                            <p style="color:#bdc3c7;margin:0 0 15px 0;font-size:14px;">\n                                Síguenos en redes sociales:\n                            </p>\n                            <a href="https://twitter.com/rustmeetup" style="color:#3498db;text-decoration:none;margin:0 10px;">Twitter</a>\n                            <a href="https://github.com/rust-meetup" style="color:#3498db;text-decoration:none;margin:0 10px;">GitHub</a>\n                            <a href="https://linkedin.com/company/rust-meetup" style="color:#3498db;text-decoration:none;margin:0 10px;">LinkedIn</a>\n\n                            <p style="color:#95a5a6;margin:20px 0 10px 0;font-size:12px;">\n                                Rust Meetup Madrid | Tech Hub Madrid<br>\n                                Calle Innovation 42, 28001 Madrid\n                            </p>\n\n                            <a href="[unsubscribe]" style="color:#95a5a6;font-size:12px;text-decoration:underline;">\n                                Darse de baja\n                            </a>\n                        </td>\n                    </tr>\n                </table>\n            </td>\n        </tr>\n    </table>\n</body>\n</html>\n```\n\n## Integration Monitoring\n\n### Prometheus Metrics\n\n```yaml\n# n8n-monitoring.yaml\napiVersion: v1\nkind: ServiceMonitor\nmetadata:\n  name: n8n-metrics\n  namespace: n8n-automation\n  labels:\n    app: n8n\nspec:\n  selector:\n    matchLabels:\n      app: n8n\n  endpoints:\n  - port: http\n    path: /metrics\n    interval: 30s\n```\n\n### Grafana Dashboard\n\n```json\n{\n  "dashboard": {\n    "title": "Rust Meetup - n8n & Sendy Integration",\n    "panels": [\n      {\n        "title": "Registration Rate",\n        "type": "stat",\n        "targets": [\n          {\n            "expr": "rate(n8n_workflow_executions_total{workflow_name=\"Rust Meetup Registration Flow\"}[5m])",\n            "legendFormat": "Registrations/min"\n          }\n        ]\n      },\n      {\n        "title": "Email Delivery Success Rate",\n        "type": "stat",\n        "targets": [\n          {\n            "expr": "rate(n8n_workflow_executions_total{workflow_name=\"Pre-Event Email Automation\",status=\"success\"}[1h]) / rate(n8n_workflow_executions_total{workflow_name=\"Pre-Event Email Automation\"}[1h])",\n            "legendFormat": "Success Rate %"\n          }\n        ]\n      },\n      {\n        "title": "Live Engagement Score",\n        "type": "graph",\n        "targets": [\n          {\n            "expr": "avg(baserow_engagement_score) by (poll_question)",\n            "legendFormat": "{{ poll_question }}"\n          }\n        ]\n      }\n    ]\n  }\n}\n```\n\n## Best Practices\n\n### 1. Registration Flow Optimization\n\n- **Multiple Entry Points**: QR codes, direct URLs, social media links\n- **Progressive Profiling**: Collect minimal info initially, expand during event\n- **A/B Testing**: Test different landing page versions\n- **Mobile First**: Ensure perfect mobile experience\n\n### 2. Segmentation Strategy\n\n```javascript\n// Sendy Custom Fields for Segmentation\nconst segmentationFields = {\n  experience_level: ['beginner', 'intermediate', 'advanced'],\n  interest_areas: ['infrastructure', 'automation', 'rust', 'devops'],\n  company_size: ['startup', 'small', 'medium', 'enterprise'],\n  role: ['developer', 'devops', 'architect', 'manager'],\n  previous_attendee: ['yes', 'no'],\n  engagement_score: 'numeric',\n  last_interaction: 'datetime'\n};\n```\n\n### 3. Email Automation Sequences\n\n```plaintext\nPre-Event Sequence:\nDay -7: Welcome + Event Details + Calendar Invite\nDay -3: Pre-event Survey + Preparation Materials\nDay -1: Final Reminder + Access Instructions\nDay 0: Event Day - Location & Last-minute Updates\n\nPost-Event Sequence:\nDay +1: Thank You + Survey + Resources\nDay +3: Presentation Slides + Additional Resources\nDay +7: Community Follow-up + Next Events\nDay +30: Long-term Engagement Survey\n```\n\n### 4. Security Considerations\n\n```yaml\n# Security Headers for n8n\nannotations:\n  nginx.ingress.kubernetes.io/configuration-snippet: |\n    add_header X-Frame-Options "SAMEORIGIN" always;\n    add_header X-Content-Type-Options "nosniff" always;\n    add_header X-XSS-Protection "1; mode=block" always;\n    add_header Referrer-Policy "strict-origin-when-cross-origin" always;\n    add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline';" always;\n```\n\n## Deployment Commands\n\n```bash\n# Deploy n8n\nkubectl apply -f n8n-namespace.yaml\nkubectl apply -f n8n-secrets.yaml\nkubectl apply -f n8n-config.yaml\nkubectl apply -f n8n-storage.yaml\nkubectl apply -f n8n-deployment.yaml\nkubectl apply -f n8n-service.yaml\nkubectl apply -f n8n-ingress.yaml\nkubectl apply -f n8n-virtualservice.yaml\n\n# Verify deployment\nkubectl get pods -n n8n-automation\nkubectl logs -f deployment/n8n -n n8n-automation\n\n# Access n8n\nkubectl port-forward svc/n8n 8080:80 -n n8n-automation\n# Then access: http://localhost:8080\n```\n\nThis complete setup provides a robust, scalable integration between Sendy and your event management tools using n8n on Kubernetes with both traditional Ingress and Istio support.