gistfile1.txt

<service id="swiftmailer.message" class="Swift_Message" factory-method="newInstance" shared="false">
    <file>%swiftmailer.init_file%</file>
    <argument>null</argument>
    <argument>null</argument>
    <argument>null</argument>
    <argument>%kernel.charset%</argument>
    <call method="setFrom">
        <argument>noreply@example.com</argument>
    </call>
</service>

<service id="new_message" alias="swiftmailer.message" />