Symfony – Sending Failed Messages on purpose

I’m currently using Messenger to send mails with Mailer through my MessageHandler.

Here’s my messenger.yaml config file.

# config/packages/messenger.yaml
framework:
    messenger:
        transports:
            async: 
                dsn: '%env(MESSENGER_TRANSPORT_DSN)%'
                options:
                      table_name: messenger_message

            failed:
                dsn: '%env(MESSENGER_TRANSPORT_DSN)%'
                options:
                    queue_name: failed
                    table_name: messenger_message_failed

        routing:
            AppMessageSendEmailMessage: async

How can I send failed messages on purpose to see if my messenger_message_failed receives the data ?