Resend Outage History
Resend is up right nowPingoru has recorded 104 incidents for Resend: 104 in the last 12 months and 27 in the last 90 days.
Show as a table
| Month | Incidents | Hours with an open incident |
|---|---|---|
| April 2026 | 14 | 12 of 720 (2%) |
| May 2026 | 3 | 28 of 744 (4%) |
| June 2026 | 6 | 7 of 720 (1%) |
| July 2026 | 13 | 79 of 744 (11%) |
| August 2026 | 7 | 19 of 744 (2%) |
| September 2026 | 11 | 78 of 720 (11%) |
| October 2026 | 4 | 3 of 585 (1%) |
Incidents, newest first
Minor July 22, 2026 Errors creating domains and API keys 8m Batch Emails, General API, Email Events, Webhooks and 6 more
Started Jul 22, 2026, 07:43 PM UTC· resolved Jul 22, 2026, 07:51 PM UTC
- identified Jul 22, 2026, 07:43 PM UTC
We have identified an issue with creating API keys and domains and we are working on a fix now.
- resolved Jul 22, 2026, 07:51 PM UTC
We have resolved the underlying issue and service has been resumed.
Minor July 20, 2026 Delivery Delayed Events to Microsoft Hosted Domains 1d 1h
Started Jul 20, 2026, 05:47 PM UTC· resolved Jul 21, 2026, 07:39 PM UTC
- investigating Jul 20, 2026, 05:47 PM UTC
We're currently investigating reports of an increase in Delivery Delayed events to Microsoft-hosted email addresses.
- investigating Jul 21, 2026, 01:16 PM UTC
We're continuing to investigate the causes of Deliverability Delayed events with Microsoft and working with them directly. Thank you for your patience as we investigate this.
- monitoring Jul 21, 2026, 04:39 PM UTC
We've received word from Microsoft that they've addressed the cause of the bounces. While it may still be possible to see emails in the Delivery Delayed status while we wait on retry, newly sent emails are now Delivered.
- resolved Jul 21, 2026, 07:39 PM UTC
Delivery to Microsoft has returned to normal. Thank you for your patience as we worked with them regarding this.
Minor July 16, 2026 Elevated errors on the dashboard 45m Batch Emails, General API, Email Events, Webhooks and 6 more
Started Jul 16, 2026, 11:45 AM UTC· resolved Jul 16, 2026, 12:30 PM UTC
- identified Jul 16, 2026, 11:45 AM UTC
We have identified increased error rates on the dashboard correlated with an upstream provider incident. We're shipping improvements to contain the errors.
- resolved Jul 16, 2026, 12:30 PM UTC
We have resolved the underlying issue and service has been resumed.
Minor July 16, 2026 Domain-related webhooks delayed 38m Webhooks
Started Jul 16, 2026, 11:11 AM UTC· resolved Jul 16, 2026, 11:50 AM UTC
- investigating Jul 16, 2026, 11:11 AM UTC
We are currently investigating increased latency in email sending. At this time, you may experience delays when sending emails via our SMTP service and API.
- monitoring Jul 16, 2026, 11:44 AM UTC
The fix has been pushed and we are now monitoring the situation.
- resolved Jul 16, 2026, 11:50 AM UTC
We have resolved the underlying issue and service has been resumed.
Minor July 12, 2026 Increased latency in CSV imports and automation runs 6m Automations
Started Jul 12, 2026, 08:22 PM UTC· resolved Jul 12, 2026, 08:29 PM UTC
- investigating Jul 12, 2026, 08:22 PM UTC
We are currently investigating increased latency in contact imports via CSV files and automation runs. At this time, you may experience delays in the processes that rely on these features.
- resolved Jul 12, 2026, 08:29 PM UTC
We have resolved the underlying issue and service has been resumed.
Minor July 10, 2026 Increased latency across API endpoints and email sending 53m Batch Emails, General API, Dashboard, Single Email and 2 more
Started Jul 10, 2026, 01:21 PM UTC· resolved Jul 10, 2026, 02:14 PM UTC
- investigating Jul 10, 2026, 01:21 PM UTC
We're noticing increased API latency across different endpoints, causing delays in email sending.
- identified Jul 10, 2026, 01:31 PM UTC
We have identified the issue and are deploying a fix now. The team is monitoring. Latency has recovered, but we're keeping this incident open for the next few minutes to monitor downstream services.
- monitoring Jul 10, 2026, 01:53 PM UTC
The deployment has been completed, and we're still monitoring. Latency has stabilized since 13:38 UTC.
- resolved Jul 10, 2026, 02:14 PM UTC
We have resolved the underlying issue and service has been resumed.
Minor July 3, 2026 Email sending delay 1h 3m Batch Emails, Single Email, SMTP, Broadcast Emails
Started Jul 03, 2026, 10:17 AM UTC· resolved Jul 03, 2026, 11:21 AM UTC
- investigating Jul 03, 2026, 10:17 AM UTC
We are currently investigating increased latency in email sending. At this time, you may experience delays when sending emails via our SMTP service and API.
- resolved Jul 03, 2026, 11:21 AM UTC
We have resolved the underlying issue and services have been recovered.
Minor July 1, 2026 Elevated error rates across our APIs and SMTP services 24m Batch Emails, General API, Email Events, Webhooks and 6 more
Started Jul 01, 2026, 03:36 PM UTC· resolved Jul 01, 2026, 04:00 PM UTC
- identified Jul 01, 2026, 03:36 PM UTC
Our team has identified an issue causing elevated error rates across our APIs and SMTP services. The impact is currently affecting email sending requests, which may result in increased 500 errors for some customers. We are actively working on mitigation and will provide further updates as we make progress.
- monitoring Jul 01, 2026, 03:43 PM UTC
Services are recovering to normal. Our team is actively monitoring to ensure no further issues are impacting the requests.
- resolved Jul 01, 2026, 04:00 PM UTC
Our team has mitigated the issue and this incident is fully resolved. All services are operational.
Minor June 22, 2026 Delayed webhooks 23m Email Events, Webhooks
Started Jun 22, 2026, 08:34 PM UTC· resolved Jun 22, 2026, 08:57 PM UTC
- investigating Jun 22, 2026, 08:34 PM UTC
We are currently investigating increased latency in email events. Emails are being sent normally without any delays, but their respective statuses are taking longer to appear in the dashboard or via webhooks. Email sending is not affected.
- investigating Jun 22, 2026, 08:38 PM UTC
We have identified that email events are being updated correctly in the dashboard, but webhook sending is delayed. The team is still investigating.
- identified Jun 22, 2026, 08:48 PM UTC
We have identified the issue and we are working on a fix now.
- monitoring Jun 22, 2026, 08:48 PM UTC
Affected webhooks are now being sent. We expect the affected webhooks to be sent within the next 20 minutes. No webhooks were lost.
- resolved Jun 22, 2026, 08:57 PM UTC
We have resolved the underlying issue, and all the affected webhooks have been sent.
Minor June 22, 2026 Degraded perfomance in Metrics 4h 1m Dashboard
Started Jun 22, 2026, 06:05 PM UTC· resolved Jun 22, 2026, 10:07 PM UTC
- identified Jun 22, 2026, 06:05 PM UTC
We've identified an issue that is causing increased latency in Metrics. At this time, you may experience delays seeing your email sending metrics in the Metrics tab.
- resolved Jun 22, 2026, 10:07 PM UTC
We have resolved the underlying issue and service has been resumed.
Major June 17, 2026 Email Events partially unavailable 38m Email Events
Started Jun 17, 2026, 04:29 PM UTC· resolved Jun 17, 2026, 05:07 PM UTC
- identified Jun 17, 2026, 04:28 PM UTC
We have identified the issue and we are working on a fix now.
- identified Jun 17, 2026, 04:29 PM UTC
We have identified the issue and we are working on a fix now.
Minor June 17, 2026 Automations not starting 36m Batch Emails, General API, Email Events, Webhooks and 6 more
Started Jun 17, 2026, 04:19 PM UTC· resolved Jun 17, 2026, 04:55 PM UTC
- investigating Jun 17, 2026, 04:19 PM UTC
We are currently investigating an issue with automations not starting.
- resolved Jun 17, 2026, 04:55 PM UTC
We have resolved the underlying issue and service has been resumed.
Minor June 15, 2026 Issues downloading attachments 1h 19m General API
Started Jun 15, 2026, 07:55 PM UTC· resolved Jun 15, 2026, 09:14 PM UTC
- investigating Jun 15, 2026, 07:55 PM UTC
We are currently investigating issues with downloading attachments where existing download URLs would incorrectly return a 403 response.
- monitoring Jun 15, 2026, 08:40 PM UTC
The fix for downloading email attachments has been pushed and we are now monitoring the situation.
- resolved Jun 15, 2026, 09:14 PM UTC
We have resolved the underlying issue and service has been resumed.
Minor June 3, 2026 API quota reporting incorrect numbers 30m Batch Emails, Single Email, Broadcast Emails
Started Jun 03, 2026, 03:45 PM UTC· resolved Jun 03, 2026, 04:15 PM UTC
- identified Jun 03, 2026, 03:45 PM UTC
We are currently reverting a change that cause quotas to be calculated incorrectly.
- monitoring Jun 03, 2026, 04:10 PM UTC
The fix has been pushed and we are now monitoring the situation.
- resolved Jun 03, 2026, 04:15 PM UTC
We have resolved the underlying issue and service has been resumed.
Minor May 26, 2026 Resend dashboard facing intermittent errors 7m Batch Emails, General API, Email Events, Webhooks and 5 more
Started May 26, 2026, 03:29 PM UTC· resolved May 26, 2026, 03:36 PM UTC
- investigating May 26, 2026, 03:29 PM UTC
We are currently investigating increased latency in Resend dashboard. At this time, you may experience delays and errors while trying to access our dashboard.
- resolved May 26, 2026, 03:36 PM UTC
We have resolved the underlying issue and service has been resumed.
Minor May 7, 2026 Inbound emails with incorrect "To" field when forwarded 1d 2h Batch Emails, General API, Email Events, Webhooks and 5 more
Started May 07, 2026, 02:54 PM UTC· resolved May 08, 2026, 05:47 PM UTC
- identified May 07, 2026, 02:54 PM UTC
A recent change to how Resend processes inbound emails affected customers who receive emails via server-side forwarding rules, where a mail server automatically redirects an email to a different address without rewriting its headers. When an email is forwarded this way to a Resend inbound address, the to field in the inbound webhook payload began reflecting the original "To" header (e.g. [email protected]) rather than the address that actually received the delivery (e.g. your Resend inbound address). Direct emails and client-side forwards were not affected.
- resolved May 08, 2026, 05:47 PM UTC
We have resolved the underlying issue by reverting the unintended breaking change and service has been resumed.
Minor May 6, 2026 Custom tracking domains failing to provision for new customers 51m
Started May 06, 2026, 09:57 AM UTC· resolved May 06, 2026, 10:48 AM UTC
- investigating May 06, 2026, 09:57 AM UTC
Since 09:45 UTC on May 5, 2026, new customers are unable to create custom tracking domains. Existing tracking domains and email sending are not affected. We've identified the cause as an upstream infrastructure limit and are working with our provider to resolve it.
- monitoring May 06, 2026, 10:22 AM UTC
Issue identified and resolved for new requests. New customers can now create custom tracking domains again. We're replaying the failed provisioning requests from the outage window. This may take some time to fully process.
- resolved May 06, 2026, 10:48 AM UTC
This incident is resolved. All failed provisioning requests have been reprocessed, and custom tracking domain creation is operating normally.
Minor April 28, 2026 Email Events Displaying Queued 44m Email Events
Started Apr 28, 2026, 07:17 PM UTC· resolved Apr 28, 2026, 08:01 PM UTC
- investigating Apr 28, 2026, 07:17 PM UTC
We are currently investigating a delay in updating of email events. Emails are being sent/delivered, though the events may display as Queued.
- identified Apr 28, 2026, 07:17 PM UTC
We've identified the cause of the delay in email events. Event statuses are beginning to catch up. Emails continue to be sent and delivered as normal. Only the displayed status was affected.
- monitoring Apr 28, 2026, 07:29 PM UTC
We've deployed a fix for the delayed events. Webhook deliveries and email event statuses have caught up and are updating in real time. We're monitoring to confirm the fix holds.
- resolved Apr 28, 2026, 08:01 PM UTC
This incident is resolved. Webhook deliveries and metrics page updates have been stable since our fix was deployed. Sending and receiving were unaffected throughout. Thanks for your patience.
Minor April 24, 2026 Email events delayed 2h 48m Email Events
Started Apr 24, 2026, 04:37 PM UTC· resolved Apr 24, 2026, 07:26 PM UTC
- investigating Apr 24, 2026, 04:37 PM UTC
We are currently investigating increased latency in email events being updated.
- identified Apr 24, 2026, 05:58 PM UTC
We've identified the cause of the Queued events are currently working through the backlog of events.
- identified Apr 24, 2026, 06:55 PM UTC
We're continuing to work through the backlog of events.
- resolved Apr 24, 2026, 07:26 PM UTC
The processing backlog is fully cleared. All systems are operational.
Minor April 23, 2026 Degraded performance in email sending via API and SMTP –
Started Apr 23, 2026, 06:36 PM UTC· resolved Apr 23, 2026, 06:36 PM UTC
No vendor updates were posted for this incident.
Minor April 15, 2026 Increased latency for broadcast sending and domain verification 2h 46m
Started Apr 15, 2026, 02:19 PM UTC· resolved Apr 15, 2026, 05:05 PM UTC
No vendor updates were posted for this incident.
Minor April 10, 2026 Email sending error 1h 23m Batch Emails, General API, Single Email, SMTP and 1 more
Started Apr 10, 2026, 10:56 AM UTC· resolved Apr 10, 2026, 12:20 PM UTC
- investigating Apr 10, 2026, 10:56 AM UTC
We are currently investigating an issue affecting email sending. At this time, you may encounter 404 errors when sending emails via our SMTP service and API.
- identified Apr 10, 2026, 11:16 AM UTC
We’ve identified the root cause and are working on a fix. We’ll share updates as soon as more information becomes available.
- monitoring Apr 10, 2026, 11:25 AM UTC
A fix has been applied for Email Sending and SMTP, and we are now monitoring the situation. You may still notice errors on our general API endpoints.
- monitoring Apr 10, 2026, 12:05 PM UTC
The fix has been pushed to the General API and we are now monitoring the situation.
- resolved Apr 10, 2026, 12:20 PM UTC
We have resolved the underlying issue and service has been resumed.
Minor April 3, 2026 Delay on sending emails –
Started Apr 03, 2026, 06:25 AM UTC· resolved Apr 03, 2026, 06:25 AM UTC
No vendor updates were posted for this incident.
Minor April 2, 2026 Email Sending Delay –
Started Apr 02, 2026, 03:05 PM UTC· resolved Apr 02, 2026, 03:05 PM UTC
No vendor updates were posted for this incident.
Minor March 24, 2026 Contacts are encountering errors when unsubscribing from the audience 1h 11m
Started Mar 24, 2026, 08:12 PM UTC· resolved Mar 24, 2026, 09:23 PM UTC
- investigating Mar 24, 2026, 08:12 PM UTC
We're currently investigating errors when contacts try to unsubscribe the audience/segment.
- resolved Mar 24, 2026, 09:23 PM UTC
We have resolved the underlying issue and service has been resumed.