diff --git a/Plugin/Magento/Framework/Mail/Message.php b/Plugin/Magento/Framework/Mail/Message.php
index 4eecfcb..01b056a 100644
--- a/Plugin/Magento/Framework/Mail/Message.php
+++ b/Plugin/Magento/Framework/Mail/Message.php
@@ -51,6 +51,7 @@ public function __construct(
 	 */
 	public function afterSetBody(\Magento\Framework\Mail\Message $subject, $result)
 	{
+		$this->registry->unregister('mageplaza_smtp_message');
 		$this->registry->register('mageplaza_smtp_message', $subject);
 
 		return $result;