diff --git a/app/Http/Controllers/MailController.php b/app/Http/Controllers/MailController.php
index b51500d..8e5964c 100644
--- a/app/Http/Controllers/MailController.php
+++ b/app/Http/Controllers/MailController.php
@@ -30,6 +30,7 @@ public function index(Request $request)
     public function get(Request $request)
     {
         $email = $request->input('email');
+        $email = strtolower($email);
         $key   = $request->input('key', '');
 
         $validator = Validator::make($request->all(), [
@@ -104,8 +105,8 @@ function ($attribute, $value, $fail) {
             'code' => 1,
             'msg'  => '',
             'data' => [
-                'list'     => $new_email_list,
-                'new_key'  => Crypt::encryptString(json_encode($key)),
+                'list'    => $new_email_list,
+                'new_key' => Crypt::encryptString(json_encode($key)),
             ],
         ]);
     }
@@ -128,7 +129,7 @@ public function put(Request $request)
 
         $mail->from      = $from;
         $mail->from_hash = hash('sha256', $from);
-        $mail->to        = $to;
+        $mail->to        = strtolower($to);
         $mail->to_hash   = hash('sha256', $to);
 
         $mail->title         = $title;