diff --git a/docs/configuration.md b/docs/configuration.md
index 6670197..ee1e49f 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -279,6 +279,12 @@ return [
         'type' => 'TXT',
         'parameters' => ['"v=spf1 include:example.com ~all"'],
     ],
+    // MX record
+    [
+        'name' => '@',
+        'type' => 'MX',
+        'parameters' => [10, 'mail.example.com.'], // Priority and mail server
+    ],
 ];
 ```