diff --git a/src/Illuminate/Mail/Transport/SparkPostTransport.php b/src/Illuminate/Mail/Transport/SparkPostTransport.php
index 98612f9885b5..9fec38354418 100644
--- a/src/Illuminate/Mail/Transport/SparkPostTransport.php
+++ b/src/Illuminate/Mail/Transport/SparkPostTransport.php
@@ -54,6 +54,7 @@ public function send(Swift_Mime_Message $message, &$failedRecipients = null)
                 'content' => [
                     'html' => $message->getBody(),
                     'from' => $this->getFrom($message),
+                    'reply_to' => $this->getReplyTo($message),
                     'subject' => $message->getSubject(),
                 ],
             ],
@@ -106,6 +107,19 @@ protected function getFrom(Swift_Mime_Message $message)
         }, array_keys($message->getFrom()), $message->getFrom())[0];
     }
 
+    /**
+     * Get the 'reply_to' headers and format as required by SparkPost.
+     *
+     * @param  Swift_Mime_Message  $message
+     * @return string
+     */
+    protected function getReplyTo(Swift_Mime_Message $message)
+    {
+        if (is_array($message->getReplyTo())) {
+            return current($message->getReplyTo()).' <'.key($message->getReplyTo()).'>';
+        }
+    }
+
     /**
      * Get the API key being used by the transport.
      *