isStarted() {@inheritdoc}

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

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

stop() {@inheritdoc}

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

stop() {@inheritdoc}

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

isStarted() {@inheritdoc}

string getKey() Get the API key being used by the transport.

isStarted() {@inheritdoc}