diff --git a/src/Symfony/Component/Mailer/Transport/Smtp/EsmtpTransport.php b/src/Symfony/Component/Mailer/Transport/Smtp/EsmtpTransport.php
index 85809e8f64..3f68227ba4 100644
--- a/src/Symfony/Component/Mailer/Transport/Smtp/EsmtpTransport.php
+++ b/src/Symfony/Component/Mailer/Transport/Smtp/EsmtpTransport.php
@@ -115,6 +115,7 @@ class EsmtpTransport extends SmtpTransport
 
             try {
                 $response = $this->executeCommand(sprintf("EHLO %s\r\n", $this->getLocalDomain()), [250]);
+                $capabilities = $this->getCapabilities($response);
             } catch (TransportExceptionInterface $e) {
                 parent::doHeloCommand();