diff --git a/apps/api/.env.example b/apps/api/.env.example
index ee79242..1f50f85 100644
--- a/apps/api/.env.example
+++ b/apps/api/.env.example
@@ -12,9 +12,9 @@ NODE_ENV=development
 SUPABASE_URL=https://tu-supabase.tudominio.com
 SUPABASE_SERVICE_ROLE_KEY=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...
 
-# Resend — servicio de email
-# Crear cuenta en https://resend.com y configurar dominio
-RESEND_API_KEY=re_...
+# n8n — relé de email vía webhook (n8n se encarga de enviar por Gmail/SMTP)
+# La URL es la del webhook configurado en el workflow de n8n.
+N8N_EMAIL_WEBHOOK_URL=https://n8n.tudominio.com/webhook/naturcalabacera-email
 EMAIL_FROM=Naturcalabacera <reservas@tudominio.com>
 
 # Destinatarios de notificaciones (parametrizables, sin hardcodear)
diff --git a/apps/api/src/config/env.ts b/apps/api/src/config/env.ts
index b25325c..213374a 100644
--- a/apps/api/src/config/env.ts
+++ b/apps/api/src/config/env.ts
@@ -22,8 +22,8 @@ export const env = {
   SUPABASE_URL: required('SUPABASE_URL'),
   SUPABASE_SERVICE_ROLE_KEY: required('SUPABASE_SERVICE_ROLE_KEY'),
 
-  // Email — Resend
-  RESEND_API_KEY: required('RESEND_API_KEY'),
+  // Email — n8n webhook (relé a Gmail)
+  N8N_EMAIL_WEBHOOK_URL: required('N8N_EMAIL_WEBHOOK_URL'),
   EMAIL_FROM: optional('EMAIL_FROM', 'Naturcalabacera <reservas@naturcalabacera.com>'),
 
   // Destinatarios de notificaciones (configurables, sin hardcodear)
diff --git a/apps/api/src/services/email.ts b/apps/api/src/services/email.ts
index c7fe816..5424e38 100644
--- a/apps/api/src/services/email.ts
+++ b/apps/api/src/services/email.ts
@@ -7,40 +7,34 @@ interface SendEmailOptions {
   replyTo?: string;
 }
 
-interface ResendResponse {
-  id?: string;
-  error?: { message: string; name: string };
-}
-
 /**
- * Envía un email usando la API de Resend.
- * Docs: https://resend.com/docs/api-reference/emails/send-email
+ * Envía un email a través del webhook de n8n.
+ * El workflow de n8n recibe { to, subject, html } y lo envía vía Gmail.
  */
 export async function sendEmail(options: SendEmailOptions): Promise<{ success: boolean; id?: string; error?: string }> {
   try {
-    const res = await fetch('https://api.resend.com/emails', {
+    const to = Array.isArray(options.to) ? options.to.join(', ') : options.to;
+
+    const res = await fetch(env.N8N_EMAIL_WEBHOOK_URL, {
       method: 'POST',
-      headers: {
-        'Authorization': `Bearer ${env.RESEND_API_KEY}`,
-        'Content-Type': 'application/json',
-      },
+      headers: { 'Content-Type': 'application/json' },
       body: JSON.stringify({
-        from: env.EMAIL_FROM,
-        to: Array.isArray(options.to) ? options.to : [options.to],
+        to,
         subject: options.subject,
         html: options.html,
-        ...(options.replyTo && { reply_to: options.replyTo }),
+        from: env.EMAIL_FROM,
+        replyTo: options.replyTo,
       }),
     });
 
-    const data = await res.json() as ResendResponse;
-
-    if (!res.ok || data.error) {
-      const errorMsg = data.error?.message ?? `HTTP ${res.status}`;
+    if (!res.ok) {
+      const text = await res.text().catch(() => '');
+      const errorMsg = `HTTP ${res.status}${text ? ` — ${text.slice(0, 200)}` : ''}`;
       console.error('[email] Error al enviar:', errorMsg);
       return { success: false, error: errorMsg };
     }
 
+    const data = await res.json().catch(() => ({})) as { id?: string };
     return { success: true, id: data.id };
   } catch (err) {
     const errorMsg = err instanceof Error ? err.message : 'Error desconocido';
diff --git a/n8n-workflows/naturcalabacera-email-relay.json b/n8n-workflows/naturcalabacera-email-relay.json
new file mode 100644
index 0000000..80666bc
--- /dev/null
+++ b/n8n-workflows/naturcalabacera-email-relay.json
@@ -0,0 +1,71 @@
+{
+  "name": "Naturcalabacera - Email Relay",
+  "nodes": [
+    {
+      "parameters": {
+        "httpMethod": "POST",
+        "path": "naturcalabacera-email",
+        "responseMode": "responseNode",
+        "options": {}
+      },
+      "id": "webhook-naturcalabacera",
+      "name": "Webhook (POST email)",
+      "type": "n8n-nodes-base.webhook",
+      "typeVersion": 2,
+      "position": [240, 300]
+    },
+    {
+      "parameters": {
+        "sendTo": "={{ $json.body.to }}",
+        "subject": "={{ $json.body.subject }}",
+        "emailType": "html",
+        "message": "={{ $json.body.html }}",
+        "options": {}
+      },
+      "id": "gmail-send",
+      "name": "Gmail — Enviar",
+      "type": "n8n-nodes-base.gmail",
+      "typeVersion": 2.1,
+      "position": [520, 300]
+    },
+    {
+      "parameters": {
+        "respondWith": "json",
+        "responseBody": "={{ { success: true, id: $json.id } }}",
+        "options": {}
+      },
+      "id": "respond-ok",
+      "name": "Responder OK",
+      "type": "n8n-nodes-base.respondToWebhook",
+      "typeVersion": 1.1,
+      "position": [800, 300]
+    }
+  ],
+  "connections": {
+    "Webhook (POST email)": {
+      "main": [
+        [
+          {
+            "node": "Gmail — Enviar",
+            "type": "main",
+            "index": 0
+          }
+        ]
+      ]
+    },
+    "Gmail — Enviar": {
+      "main": [
+        [
+          {
+            "node": "Responder OK",
+            "type": "main",
+            "index": 0
+          }
+        ]
+      ]
+    }
+  },
+  "settings": {
+    "executionOrder": "v1"
+  }
+}