diff --git a/lib/private/Mail/Mailer.php b/lib/private/Mail/Mailer.php
index df23b66936577..71ff08fea8020 100644
--- a/lib/private/Mail/Mailer.php
+++ b/lib/private/Mail/Mailer.php
@@ -282,6 +282,6 @@ protected function getSendMailInstance(): \Swift_SendmailTransport {
 				break;
 		}
 
-		return new \Swift_SendmailTransport($binaryPath . ' -bs');
+		return new \Swift_SendmailTransport($binaryPath . ' -t');
 	}
 }