System, has remained stable for several hours. We identified a problem host that had processing we believe was the root case of instability. That host has been disabled and is undergoing further investigation.

We believe that the service is now stabilising. Investigation into the cause continues.

We are seeing some service instability related to the identified cause. Efforts are being made to keep the service up while a stop-gap solution is created.

Service has been restored, and a probable cause identified.

Impact is that no inbound mail will be processed at this time. Issue events fired by Jira Cloud during this time will also not result in notifications being sent. Investigation is already in progress.