diff --git a/mailcow/src/mailcow-dockerized/data/web/inc/ajax/sieve_validation.php b/mailcow/src/mailcow-dockerized/data/web/inc/ajax/sieve_validation.php
new file mode 100644
index 0000000..eb421b4
--- /dev/null
+++ b/mailcow/src/mailcow-dockerized/data/web/inc/ajax/sieve_validation.php
@@ -0,0 +1,22 @@
+<?php
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/prerequisites.inc.php';
+header('Content-Type: application/json');
+if (!isset($_SESSION['mailcow_cc_role'])) {
+  exit();
+}
+if (isset($_GET['script'])) {
+  $sieve = new Sieve\SieveParser();
+  try {
+    if (empty($_GET['script'])) {
+      echo json_encode(array('type' => 'danger', 'msg' => $lang['danger']['script_empty']));
+      exit();
+    }
+    $sieve->parse($_GET['script']);
+  }
+  catch (Exception $e) {
+    echo json_encode(array('type' => 'danger', 'msg' => $e->getMessage()));
+    exit();
+  }
+  echo json_encode(array('type' => 'success', 'msg' => $lang['add']['validation_success']));
+}
+?>