diff --git a/src/Illuminate/Mail/MailManager.php b/src/Illuminate/Mail/MailManager.php
index 80cab9856388..ea530c83fe82 100644
--- a/src/Illuminate/Mail/MailManager.php
+++ b/src/Illuminate/Mail/MailManager.php
@@ -303,7 +303,7 @@ protected function addSesCredentials(array $config)
     protected function createResendTransport(array $config)
     {
         return new ResendTransport(
-            Resend::client($this->app['config']->get('services.resend.key')),
+            Resend::client($config['key'] ?? $this->app['config']->get('services.resend.key')),
         );
     }