Paubox experienced a major incident on March 5, 2025 affecting Outbound Security, lasting 7h 44m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Mar 05, 2025, 04:58 PM UTC
We are currently investigating a mail delay in excess of 10 minutes on our outbound servers.
- identified Mar 05, 2025, 05:58 PM UTC
While some customers report an outbound mail delay in excess of 60 minutes, we have identified the issue and are working on a solution. An additional report has been filed demonstrating ~10 minute delay on Email API.
- monitoring Mar 05, 2025, 07:10 PM UTC
We have resolved the root cause of the delay however it will take a few hours for queues to return to normal processing time. We apologize for the inconvenience.
- monitoring Mar 05, 2025, 08:23 PM UTC
Observing significant recovery in outbound queue sizes but delays will continue until they unspool. We will continue to monitor.
- monitoring Mar 05, 2025, 08:34 PM UTC
New email is flowing normally - email sent from ~11am et until ~3pm et is still unspooling.
- monitoring Mar 05, 2025, 10:36 PM UTC
Outbound queues are continuing to drop. We'll continue to monitor until deferred mail is delivered. If you see a "delivery status unknown" in your mail log - very likely it is caught in this delay. Logs should update automatically once queues clear.
- monitoring Mar 05, 2025, 10:36 PM UTC
We are continuing to monitor for any further issues.
- monitoring Mar 05, 2025, 11:40 PM UTC
Queue sizes have been reduced 90%; monitoring is ongoing until we observe deferrals have resolved.
- resolved Mar 06, 2025, 12:42 AM UTC
Deferred mail has been delivered and the incident is now resolved.