Outage in Resend
Contact webhook events are delayed in delivery
Resolved Minor
August 18, 2026 - Started 8 days ago
- Lasted about 14 hours
Incident Report
Summary AI Generated
Resend experienced a 14-hour incident where contact webhook deliveries were significantly delayed, with delays peaking at approximately 3 hours due to an infrastructure change that reduced webhook processing throughput and caused a growing backlog. No webhooks were lost, and contact management via the dashboard and API remained fully functional throughout. A fix was deployed to the underlying infrastructure to restore normal processing speed, and the backlog was fully cleared as the incident was resolved.
We are currently investigating increased latency in contact webhook delivery. We have noticed a delay of approximately 50 minutes in sending webhooks related to contact events.
The team is investigating and mitigating this processing delay issue.
Contact management via dashbaord and its API are not affected.
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Latest Updates ( sorted recent to last )
MONITORING
8 days ago - at 08/19/2026 01:06AM
We have processed more than 66% of the backlog at this point. Within the next hour, the backlog will be fully processed, and this incident will be marked as resolved.
MONITORING
8 days ago - at 08/18/2026 11:01PM
We are still monitoring the progress on processing the backlog.
The impact has been reduced from a peak 3-hour delay in delivering a contact webhook to 2h 20 min. The delay is being reduced further as we process the backlog.
Within 2-3 hours, the backlog will be completely processed.
MONITORING
8 days ago - at 08/18/2026 10:33PM
A fix has been deployed to the underlying infrastructure and we can now confirm we're processing the backlog with the correct volume.
Delayed webhooks are now being delivered. We will post another update in 30 minutes to share more about the progress on processing the backlog.
IDENTIFIED
8 days ago - at 08/18/2026 09:11PM
We have identified the issue and are working on mitigating its effects.
The volume of contact webhooks processed over time was affected by an infrastructure change, and now we have an increasing backlog of contact webhooks to process.
The team is working on increasing the speed of processing the backlog. No contact webhooks were lost.
INVESTIGATING
8 days ago - at 08/18/2026 07:53PM
We are currently investigating increased latency in contact webhook delivery. We have noticed a delay of approximately 50 minutes in sending webhooks related to contact events.
The team is investigating and mitigating this processing delay issue.
Contact management via dashbaord and its API are not affected.
Latest Resend outages
Increased latency across API endpoints - 7 days ago
Errors during the domain creation process - 14 days ago
Delayed contact webhook events - 18 days ago
Delayed contact related webhook events - 20 days ago
Increased failure rate in Domain verifications - 27 days ago
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