diff --git a/src/Symfony/Component/Mailer/Transport/AbstractTransport.php b/src/Symfony/Component/Mailer/Transport/AbstractTransport.php
index cf21c724b313..4571508da893 100644
--- a/src/Symfony/Component/Mailer/Transport/AbstractTransport.php
+++ b/src/Symfony/Component/Mailer/Transport/AbstractTransport.php
@@ -65,6 +65,8 @@ public function send(RawMessage $message, Envelope $envelope = null): ?SentMessa
         }
 
         if (!$envelope->getRecipients()) {
+            $this->getLogger()->notice('There are no recipients in the mailer envelope. Nothing was sent.');
+
             return null;
         }