diff --git a/src/Ease/Mailer.php b/src/Ease/Mailer.php
index 1146c4f..4ff1807 100644
--- a/src/Ease/Mailer.php
+++ b/src/Ease/Mailer.php
@@ -229,7 +229,7 @@ public function send()
         }
         $this->sendResult = $this->mailer->send(
             $this->emailAddress,
-            $this->mailHeadersDone,
+            (empty($this->mailHeadersDone) ? $this->mailHeaders : $this->mailHeadersDone),
             $this->mailBody
         );