diff --git a/public/mail.php b/public/mail.php
index cf346f5..b1a255e 100644
--- a/public/mail.php
+++ b/public/mail.php
@@ -32,10 +32,12 @@
     if (mail($recipient, $subject, $message)) {
       echo "Email sent successfully!";
     } else {
+      header("HTTP/1.1 400 Bad Request");
       echo "Failed to send email. Please try again later.";
     }
   } else {
     // Display errors
+    header("HTTP/1.1 400 Bad Request");
     echo "The form contains the following errors:<br>";
     foreach ($errors as $error) {
       echo "- $error<br>";