--- email.module	Thu Jan 20 12:50:00 2011
+++ email.module	Wed Feb 02 12:05:05 2011
@@ -35,6 +35,12 @@
   }
 }
 
+/**
+ * Implements hook_field_widget_error().
+ */
+function email_field_widget_error($element, $error, $form, &$form_state) {
+  form_error($element, $error['message']);
+}
 
 /**
  * Implements hook_content_is_empty().