Is SEDNA down?

Our Engineering team is investigating intermittent slowness affecting customers in Dublin 2. We will provide further updates as more information becomes available.

A fix has been implemented for the intermittent slowness affecting customers in Dublin 2. Our Engineering team is monitoring the platform closely.

This incident has been resolved.

An application outage has been identified and is affecting all Sedna customers on the Sedna mobile app. Affected users will be unable to log in to or access the Sedna mobile app. The issue is under investigation by engineering as an emergency.

This incident has been resolved.

Platform performance issues have been identified and are affecting some Sedna customers across clusters. Affected users may experience intermittent slowness when accessing the platform. The issue is under investigation by engineering as an emergency.

We are continuing to investigate this issue.

We are investigating reports of platform performance affecting some customers. We will provide further updates as we learn more.

We are continuing to investigate reports of platform performance affecting some customers. We will provide further updates as we learn more.

The platform performance issue identified earlier today has been resolved. We're continuing to investigate separate reports of the application becoming unresponsive for a subset of users, and are working directly with affected customers to gather diagnostic information. We'll share further updates as we progress.

This incident has been resolved.

An outage affecting Sedna’s mail egress services has been identified. Affected users are unable to send mail. The issue is under investigation by engineering as an emergency.

We are investigating an issue affecting outbound email from Sedna to recipients hosted on Microsoft 365 and Outlook. Microsoft's anti-spam filtering is rejecting messages sent from a number of our outbound IP addresses, and senders are receiving bounce-back notifications (NDRs) for affected messages. Inbound mail is not affected, and delivery to recipients outside of Microsoft 365 / Outlook is unaffected.

We are continuing to investigate an issue affecting outbound email from Sedna to recipients hosted on Microsoft 365 and Outlook. What's happening: Microsoft's anti-spam filtering is rejecting messages sent from a number of our outbound IP addresses. Senders are receiving bounce-back notifications (NDRs) for affected messages. We will post updates as the investigation progresses.

We are seeing signs of recovery in mail delivery to Microsoft 365 and Outlook recipients, and are continuing to monitor closely to confirm the issue is fully resolved. Microsoft has acknowledged the issue on their end, and updates from Microsoft can be tracked at: https://x.com/MSFT365Status. We will post a further update once we've confirmed full recovery.

We are continuing to see a recovery in our services for customers sending to Microsoft and MS 365 supported recipients, and we'll continue to monitor. We'll provide more updates as soon as they become available

We are continuing to see a recovery in our services for customers sending to Microsoft and MS 365 supported recipients, and we'll continue to monitor. We'll provide more updates as soon as they become available

This incident has been resolved. Mail delivery to Microsoft 365 and Outlook recipients has returned to normal. We saw no further reports of delayed or failed delivery following confirmation from affected customers and our monitoring.

Microsoft has reported service degradation that may affect outbound emails sent from Sedna via Microsoft Graph. Customers may experience delays or failures when sending emails. We are monitoring the situation and will provide updates as they become available.

We are continuing to investigate this issue.

The Microsoft service degradation is still ongoing. Microsoft has not yet provided an estimated time for resolution. We continue to monitor the situation and will provide further updates as they become available.

Some users are reporting improved mail flow this morning. Microsoft's service degradation (EX1464935) remains listed as active as of 06:39 UTC, and we continue to monitor closely. We will post a further update once Microsoft confirms full resolution or if conditions change.

We have received reports that services have returned to normal. Microsoft’s service degradation, EX1464935, remains listed as active as of September 2, 2026, at 01:32:37 UTC. We will continue to monitor the situation closely and provide a further update once Microsoft confirms full resolution or if conditions change.

We are continuing to investigate this issue.

Microsoft has reported that core mail flow and search functionality are recovering, with service availability above 99%. The majority of users should no longer be experiencing impact. We are continuing to monitor to confirm persistent stability before closing this incident. Microsoft's next update is expected by September 2, 2026, at 4:30 PM UTC. We will update this page accordingly.

Resolved – Microsoft has confirmed full recovery from the service degradation affecting Graph-based mail flow (EX1464935). All Sedna services related to Microsoft Graph email egress are now operating normally. We've seen no further reports of impact since our last update. Thank you for your patience while we monitored this alongside Microsoft.