.. index:: single: Configuration Reference; Swiftmailer
.. configuration-block:: .. code-block:: yaml swiftmailer: transport: smtp username: ~ password: ~ host: localhost port: false encryption: ~ auth_mode: ~ spool: type: file path: %kernel.cache_dir%/swiftmailer/spool sender_address: ~ antiflood: threshold: 99 sleep: 0 delivery_address: ~ disable_delivery: ~ logging: true