diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/config/mailer_transports.php b/src/Symfony/Bundle/FrameworkBundle/Resources/config/mailer_transports.php
index ec6dd28aaf..9c330ab2c7 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/config/mailer_transports.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/config/mailer_transports.php
@@ -34,6 +34,7 @@ return static function (ContainerConfigurator $container) {
                 service('http_client')->ignoreOnInvalid(),
                 service('logger')->ignoreOnInvalid(),
             ])
+            ->tag('monolog.logger', ['channel' => 'mailer'])
 
         ->set('mailer.transport_factory.amazon', SesTransportFactory::class)
             ->parent('mailer.transport_factory.abstract')
diff --git a/src/Symfony/Component/Mailer/CHANGELOG.md b/src/Symfony/Component/Mailer/CHANGELOG.md
index cca04f11aa..b5a1800502 100644
--- a/src/Symfony/Component/Mailer/CHANGELOG.md
+++ b/src/Symfony/Component/Mailer/CHANGELOG.md
@@ -1,6 +1,11 @@
 CHANGELOG
 =========
 
+5.3.0
+-----
+
+ * added the `mailer` monolog channel and set it on all transport definitions
+
 5.2.0
 -----