diff --git a/src/Illuminate/Mail/Transport/SparkPostTransport.php b/src/Illuminate/Mail/Transport/SparkPostTransport.php
index cc58eac6dbc3..85ee3ad1260d 100644
--- a/src/Illuminate/Mail/Transport/SparkPostTransport.php
+++ b/src/Illuminate/Mail/Transport/SparkPostTransport.php
@@ -54,7 +54,9 @@ public function send(Swift_Mime_SimpleMessage $message, &$failedRecipients = nul
 
         $message->setBcc([]);
 
-        $response = $this->client->post('https://api.sparkpost.com/api/v1/transmissions', [
+        $endpoint = $this->getOptions()['endpoint'] ?? 'https://api.sparkpost.com/api/v1/transmissions';
+
+        $response = $this->client->post($endpoint, [
             'headers' => [
                 'Authorization' => $this->key,
             ],