diff --git a/src/Symfony/Component/Mailer/Bridge/Mailchimp/Http/Api/MandrillTransport.php b/src/Symfony/Component/Mailer/Bridge/Mailchimp/Http/Api/MandrillTransport.php
index c8e313e7b739..34395ad9221e 100644
--- a/src/Symfony/Component/Mailer/Bridge/Mailchimp/Http/Api/MandrillTransport.php
+++ b/src/Symfony/Component/Mailer/Bridge/Mailchimp/Http/Api/MandrillTransport.php
@@ -79,10 +79,14 @@ private function getPayload(Email $email, SmtpEnvelope $envelope): array
                 'type' => $headers->get('Content-Type')->getBody(),
             ];
 
+            if ($name = $headers->getHeaderParameter('Content-Disposition', 'name')) {
+                $att['name'] = $name;
+            }
+
             if ('inline' === $disposition) {
-                $payload['images'][] = $att;
+                $payload['message']['images'][] = $att;
             } else {
-                $payload['attachments'][] = $att;
+                $payload['message']['attachments'][] = $att;
             }
         }