Resolved
This has been resolved. All inbound email processing have been caught up. No messages have been lost.
Monitoring
We have been alerted to an incident with our email provider, affecting US hosted Pylon workspaces, causing delayed processing of inbound delays that began at 8:25 PDT. No messages were lost and were queued for processing.
As of 9:03 PDT they have implemented a fix and inbound message processing is now recovering. Delayed messages are being worked through, and processing times are returning to normal. We are continuing to monitor this fix to confirm a full recover.