diff --git a/stalwart/templates/ingress.yaml b/stalwart/templates/ingress.yaml
index 5c76eb8..bcfbfa2 100644
--- a/stalwart/templates/ingress.yaml
+++ b/stalwart/templates/ingress.yaml
@@ -8,6 +8,11 @@ metadata:
     cert-manager.io/cluster-issuer: prod-cluster-issuer
     nginx.ingress.kubernetes.io/backend-protocol: "HTTP"
     nginx.ingress.kubernetes.io/ssl-passthrough: "false"
+    nginx.ingress.kubernetes.io/enable-cors: "true"
+    nginx.ingress.kubernetes.io/cors-allow-origin: "*"
+    nginx.ingress.kubernetes.io/cors-allow-methods: "GET, POST, PUT, DELETE, OPTIONS"
+    nginx.ingress.kubernetes.io/cors-allow-headers: "DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization"
+    nginx.ingress.kubernetes.io/cors-allow-credentials: "true"
 spec:
   ingressClassName: nginx
   rules: