start() {@inheritdoc}

string setKey(string $key) Set the API key being used by the transport

stop() {@inheritdoc}

stop() {@inheritdoc}

string getDomain() Get the domain being used by the transport.

string setKey(string $key) Set the API key being used by the transport

send(Swift_Mime_Message $message, $failedRecipients = null) {@inheritdoc}

isStarted() {@inheritdoc}

isStarted() {@inheritdoc}

stop() {@inheritdoc}