Update from our Hosted Email partner/provider:
At approximately 5 PM ET (9 PM UTC), our system alerted us to a large-scale DDoS attack to Cluster A of our Hosted Email Service. We effectively mitigated the risks, however the unprecedented size of the attack exposed some limitations in the scalability of our authentication service. Our engineering team moved quickly to identify and address the root problem.
As of the time of this update, normal service operations have been restored, all users are now able to log in without issue, and all new send requests are being processed as expected. The remaining backlog of inbound email requests may take up to 12 hours to clear.
Having addressed the root issue, we are marking this incident as closed. We sincerely apologize for the impact this service interruption has had. In the coming weeks, we will release an Incident Report detailing the what happened, how we approached and resolved it, and how we will perform better in the future.
