After continued monitoring, impacted Gateway servers remain healthy and no additional customers have been impacted.

If you continue to have issues, please contact Support for assistance.

As of April 27th 2026, 20:45 UTC - all impacted customer Gateways have been remediated.
- Mail sent to a Gateway while it was unresponsive will now be accepted, processed, and delivered.
- New mail can now be safely routed to the Gateway again.

If you were impacted and have additional questions or concerns, we'd encourage you to open a support ticket if you have not done so already.

Although there is not longer an active impact; Proofpoint will continue with heightened monitoring for the next 24 hours to be safe.

Remediation of impacted customers continues.

As the remediation task runs, additional individual customers fully recover. Customers who have recovered will observe mail queued from earlier start to flow through their Gateway.
As a general estimate, we expect recovery of all remaining customers within the next 1-2 hours.

Our team has identified the issue, and continues to work to mitigate.

We have taken steps to prevent any additional customers from being impacted.

For impacted customers, mitigation efforts are underway. Once complete, queued mail impacted by this issue will flow through your Tessian Gateway again.
At that time, you can look to re-enable your routing rules and send new messages to the Gateway, if you've previously disabled them.

We will update here as mitigations efforts continue for impacted customers.