Email Delivery delays to Microsoft inboxes

We are considering this incident resolved. Braze has observed continued stability and lower latency across email sends for Microsoft-hosted inboxes over the last few hours.

We are observing signs of recovery from the global Microsoft service outage. Delivery of emails sent through Braze to recipients with Microsoft-hosted inboxes is returning to normal. At the time of this update, average delivery latency is 31 minutes.
At the peak of the incident, between 17:00 and 21:00 on 12 November 2026, latency averaged 6 hours, with a maximum of 18 hours for a small subset of messages.
To review delivery to your recipients, open the Email Performance dashboard in Braze (Analytics > Email Performance) to check delivery and soft bounce rates during the affected period. For more information, see: https://www.braze.com/docs/user_guide/analytics/dashboards/channel_performance/email
Braze services remain fully operational. We will continue monitoring and share further updates as recovery progresses.

Microsoft is currently experiencing a global outage affecting the email services it provides to its customers. This is impacting the delivery of emails sent through Braze to recipients whose mailboxes are hosted by Microsoft, including outlook.com, hotmail.com, live.com addresses, as well as business domains that use Microsoft 365. Delivery to these recipients is delayed and, as of today, 13 November 2026, affected messages continue to be retried.

Braze services continue to fully operational at this time.