AWS us-east-1 is down and so is Courier. What happens to messages sent to API?

I see AWS us-east-1 is down which means Courier is down. Is the API able to accept/queue for later new notifications despite the internal server error returned, or is there no failure tolerance currently?

We’ve updated our status page. It is related to the AWS outage. Our team is discussing this internally and will update the status page accordingly. Once AWS resolves the outage, message requests that were successfully handed off to Courier will be processed. Any calls that returned a 5xx error will need to be resubmitted.