diff --git a/src/Listeners/AutoActivateUser.php b/src/Listeners/AutoActivateUser.php
new file mode 100644
index 0000000..4947bd0
--- /dev/null
+++ b/src/Listeners/AutoActivateUser.php
@@ -0,0 +1,25 @@
+<?php
+/*
+ * This file is part of xxb5724-no-email-register.
+ */
+
+namespace XXB\NoEmailRegister\Listeners;
+
+use Flarum\User\Event\Saving;
+
+class AutoActivateUser {
+    public function handle(Saving $event) {
+        $user = $event->user;
+        if (!$user->exists) {
+            $user->activate();
+            if (empty($user->email)) {
+                $user->email = $this->generatePseudoEmail($user);
+            }
+        }
+    }
+
+    private function generatePseudoEmail($user): string {
+        $unique = uniqid(bin2hex(random_bytes(4)), true);
+        return "user_{$unique}@localemail.com";
+    }
+}