diff --git a/EnvelopeGenerator.Web/Views/Home/ShowEnvelope.cshtml b/EnvelopeGenerator.Web/Views/Home/ShowEnvelope.cshtml
index 62ff4ec7..38d7b3fa 100644
--- a/EnvelopeGenerator.Web/Views/Home/ShowEnvelope.cshtml
+++ b/EnvelopeGenerator.Web/Views/Home/ShowEnvelope.cshtml
@@ -160,7 +160,7 @@
         const dateValid_value = dateValid.value;
     
         //check email
-        if (!dateValid.classList.contains('is-invalid')) {
+            if (receiverMail.classList.contains('is-invalid')) {
             Swal.fire({
                 icon: "error",
                 title: "Falsche Email",