diff --git a/src/Symfony/Component/Mailer/Transport/AbstractTransport.php b/src/Symfony/Component/Mailer/Transport/AbstractTransport.php
index 90b04c19ab..a50e3c9b34 100644
--- a/src/Symfony/Component/Mailer/Transport/AbstractTransport.php
+++ b/src/Symfony/Component/Mailer/Transport/AbstractTransport.php
@@ -39,8 +39,6 @@ abstract class AbstractTransport implements TransportInterface
         $this->logger = $logger ?: new NullLogger();
     }
 
-    abstract public function getName(): string;
-
     /**
      * Sets the maximum number of messages to send per second (0 to disable).
      */
diff --git a/src/Symfony/Component/Mailer/Transport/SendmailTransport.php b/src/Symfony/Component/Mailer/Transport/SendmailTransport.php
index db57221750..4fa7b8a7fe 100644
--- a/src/Symfony/Component/Mailer/Transport/SendmailTransport.php
+++ b/src/Symfony/Component/Mailer/Transport/SendmailTransport.php
@@ -75,7 +75,11 @@ class SendmailTransport extends AbstractTransport
 
     public function getName(): string
     {
-        return $this->transport->getName();
+        if ($this->transport) {
+            return $this->transport->getName();
+        }
+
+        return 'smtp://sendmail';
     }
 
     protected function doSend(SentMessage $message): void