Our systems have caught up with the delayed emails and are healthy again. No emails were lost during the period of degraded performance.

We have resolved the underlying issue and confirmed the service has been resumed.

Microsoft is reporting that email is returning to normal sending, with its most recent update stating, "We have a high level of confidence that the incident is largely resolved." From our own metrics, we're also seeing "Delivery Delayed" events reduce, with deliveries now happening upon retry.

We've detected a misconfiguration on one of our load balancers which has caused 429 errors to be returned incorrectly for our APIs between 3:03 PM to 3:10 PM UTC.

Requests sent during this time returned errors because of the aforementioned reason, both on the General API, Email API and SMTP.

All systems are operating normally and no emails were lost.

We have resolved the underlying issue, and email sending has returned to normal. Thank you for your patience while we worked through this. If you have any questions or concerns, please don’t hesitate to reach out to support@resend.com.

We have confirmed the issue is resolved, no emails have been lost, and no further action needs to be taken for now.

We observed a 1.91% 500 error rate on our APIs that lasted for 5 minutes. Customers are urged to retry requests that might have failed.

We have resolved the underlying issue and service has been resumed.

We have resolved the underlying issue and service has been resumed.