Duration: 8 hours

Affected Components: Resend → Email Sending → Single Email, Resend → General API, Resend → Email Events

Jul 22, 19:51:00 GMT+0
Resolved - We have resolved the underlying issue and service has been resumed..

Jul 22, 19:43:00 GMT+0
Identified - We have identified an issue with creating API keys and domains and we are working on a fix now..

Duration: 4 days, 16 hours and 15 minutes

Affected Components: Cloudflare → Cloudflare Sites and Services → Firewall

Jul 22, 08:19:31 GMT+0
Resolved - This incident has been resolved..

Jul 22, 06:27:16 GMT+0
Investigating - Cloudflare Malicious Upload Detection Issues Cloudflare is investigating issues with elevated errors in Malicious Upload Detection service. We are working to understand the full impact and mitigate this problem. More updates to follow shortly..

Jul 22, 06:37:13 GMT+0
Identified - The issue has been identified and a fix is being implemented..

Jul 22, 07:09:34 GMT+0
Monitoring - A fix has been implemented and we are monitoring the results..

Duration: 4 days, 7 hours and 13 minutes

Affected Components: Cloudflare → Cloudflare Sites and Services → CDN/Cache

Jul 17, 15:02:12 GMT+0
Investigating - Cloudflare is aware of and investigating an issue where some customers may be experiencing POST requests not reaching origin servers correctly. We are working to analyse and mitigate this problem. More updates to follow shortly..

Jul 17, 15:06:16 GMT+0
Investigating - We are continuing to investigate this issue..

Jul 17, 15:50:28 GMT+0
Identified - The issue has been identified and a fix is being implemented..

Jul 17, 16:30:40 GMT+0
Monitoring - A fix has been implemented and we are monitoring the results..

Jul 17, 16:45:25 GMT+0
Resolved - This incident has been resolved..

Duration: 2 days, 18 hours and 55 minutes

Affected Components: Vercel → Functions

Jul 17, 14:12:58 GMT+0
Investigating - There are elevated rates of invocation failures for Hobby Team functions in new deployments. Existing deployments are unaffected. We are investigating. Mitigation is possible by rolling back to a previous deployment..

Jul 17, 14:19:52 GMT+0
Identified - We have identified the source of errors and are implementing a fix..

Jul 17, 14:27:39 GMT+0
Monitoring - We have deployed a fix and are continuing to monitor. Function invocations for new Hobby Team deployments should no longer fail. If you are still experiencing function invocation errors, redeploy or rollback to a previous deployment..

Jul 17, 15:19:53 GMT+0
Resolved - This incident has been resolved. A subset of deployments created under the Hobby plan teams during Jul 17, 2026 10:18 - Jul 17, 2026 14:10 UTC were impacted by this incident. New deployments after this window are unaffected..

Duration: 19 hours and 45 minutes

Affected Components: Cloudflare → Cloudflare Sites and Services → Network

Jul 17, 07:31:00 GMT+0
Investigating - Cloudflare is investigating issues with Network Performance for customers using AWS ap-northeast-1 region. Customers may see increased latency and HTTP 5xx errors. We are working to analyze and mitigate this problem. More updates to follow shortly..

Jul 17, 07:36:01 GMT+0
Identified - The issue has been identified and a fix is being implemented..

Jul 17, 07:44:12 GMT+0
Monitoring - A fix has been implemented and we are monitoring the results..

Jul 17, 07:50:45 GMT+0
Resolved - This incident has been resolved..

Duration: 17 hours and 1 minute

Affected Components: Cloudflare → Cloudflare Sites and Services → Network

Jul 17, 01:25:53 GMT+0
Identified - Cloudflare is investigating an increased level of HTTP 500 errors in Querétaro, Mexico. We are working to analyse and mitigate this problem. More updates to follow shortly..

Jul 17, 01:26:35 GMT+0
Monitoring - A fix has been implemented and we are monitoring the results..

Jul 17, 01:42:54 GMT+0
Resolved - This incident has been resolved..

Duration: 1 day and 21 hours

Affected Components: Resend → General API, Resend → Email Sending → Single Email, Resend → Email Events

Jul 16, 12:30:00 GMT+0
Resolved - We have resolved the underlying issue and service has been resumed..

Jul 16, 11:45:00 GMT+0
Identified - We have identified increased error rates on the dashboard correlated with an upstream provider incident. We're shipping improvements to contain the errors..

Duration: 23 days, 13 hours and 37 minutes

Affected Components: Cloudflare → Cloudflare Sites and Services → Network

Jul 15, 11:00:03 GMT+0
Monitoring - Cloudflare is investigating an increased level of HTTP 502 errors originating from the Hong Kong datacenter. We are working to analyse and mitigate this problem. More updates to follow shortly..

Jul 15, 20:25:40 GMT+0
Resolved - This incident has been resolved..

Duration: 2 days, 5 hours and 27 minutes

Affected Components: Resend → General API, Resend → Email Sending → Single Email

Jul 10, 13:21:07 GMT+0
Investigating - We're noticing increased API latency across different endpoints, causing delays in email sending..

Jul 10, 13:53:56 GMT+0
Monitoring - The deployment has been completed, and we're still monitoring. Latency has stabilized since 13:38 UTC..

Jul 10, 14:14:35 GMT+0
Resolved - We have resolved the underlying issue and service has been resumed..

Jul 10, 13:31:11 GMT+0
Identified - 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..

Duration: 1 day, 12 hours and 3 minutes

Affected Components: Cloudflare → Cloudflare Sites and Services → Network

Jul 8, 01:56:02 GMT+0
Investigating - Cloudflare is investigating issues with Network Performance in London. Some customers may experience increased latency or timeouts for the uksouth Azure region. We are working to analyze and mitigate this problem. More updates to follow shortly..

Jul 8, 02:32:05 GMT+0
Resolved - This incident has been resolved..

Jul 8, 01:56:46 GMT+0
Monitoring - A fix has been implemented and we are monitoring the results..

Duration: 2 days, 15 hours and 17 minutes

Affected Components: Resend → Email Sending → Single Email

Jul 3, 10:17:49 GMT+0
Investigating - 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..

Jul 3, 11:21:06 GMT+0
Resolved - We have resolved the underlying issue and services have been recovered..

Duration: 14 hours and 38 minutes

Affected Components: Vercel → Functions, Vercel → CDN → IAD1 - Washington DC, USA

Jul 2, 16:39:55 GMT+0
Monitoring - A fix has been implemented and we are observing recovery across CDN, Dashboard, & Functions in Washington, Cleveland (iad1, cle1). We are continuing to monitor..

Jul 2, 16:33:07 GMT+0
Identified - The issue has been identified and a fix is being implemented..

Jul 2, 16:46:33 GMT+0
Resolved - This incident has been resolved..

Jul 2, 16:31:55 GMT+0
Investigating - We are investigating an issue causing degraded performance across CDN, Dashboard, & Functions in Washington, Cleveland (iad1, cle1). We'll provide additional updates as they become available..

Duration: 1 day

Affected Components: Resend → Email Sending → Single Email, Resend → General API, Resend → Email Events

Jul 1, 15:43:00 GMT+0
Monitoring - Services are recovering to normal. Our team is actively monitoring to ensure no further issues are impacting the requests..

Jul 1, 16:00:00 GMT+0
Resolved - Our team has mitigated the issue and this incident is fully resolved. All services are operational..

Jul 1, 15:36:00 GMT+0
Identified - 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..

Duration: 23 hours and 17 minutes

Affected Components: Resend → Email Events

Jun 22, 20:34:04 GMT+0
Investigating - 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..

Jun 22, 20:38:00 GMT+0
Investigating - We have identified that email events are being updated correctly in the dashboard, but webhook sending is delayed. The team is still investigating..

Jun 22, 20:48:03 GMT+0
Identified - We have identified the issue and we are working on a fix now..

Jun 22, 20:48:36 GMT+0
Monitoring - Affected webhooks are now being sent. We expect the affected webhooks to be sent within the next 20 minutes. No webhooks were lost..

Jun 22, 20:57:22 GMT+0
Resolved - We have resolved the underlying issue, and all the affected webhooks have been sent..

Affected Components: Vercel → Functions

Jun 19, 17:54:16 GMT+0
Resolved - Between Jun 19 09:09 and 16:16 UTC, a subset of Vercel Functions using node-fetch@2 may have experienced intermittent invocation errors that surfaced as ERR_STREAM_PREMATURE_CLOSE. As part of Node.js June 2026 security releases, we began rolling out new Node.js versions. Those versions contain an upstream regression that breaks response streaming for node-fetch@2, which caused the errors https://github.com/nodejs/node/issues/63989 We have resolved the issue by reverting to the previous Node.js version. No action is required — affected functions are now operating normally. We will re-land the Node.js upgrade once the upstream issue is fixed..

Duration: 1 day and 12 hours

Affected Components: Resend → General API, Resend → Email Sending → Single Email, Resend → Email Events

Jun 17, 16:19:00 GMT+0
Investigating - We are currently investigating an issue with automations not starting..

Jun 17, 16:55:00 GMT+0
Resolved - We have resolved the underlying issue and service has been resumed..

Duration: 3 days, 7 hours and 30 minutes

Affected Components: Resend → General API

Jun 15, 20:40:47 GMT+0
Monitoring - The fix for downloading email attachments has been pushed and we are now monitoring the situation..

Jun 15, 21:14:40 GMT+0
Resolved - We have resolved the underlying issue and service has been resumed..

Jun 15, 19:55:10 GMT+0
Investigating - We are currently investigating issues with downloading attachments where existing download URLs would incorrectly return a 403 response..

Duration: 2 days, 14 hours and 24 minutes

Affected Components: Vercel → Functions

Jun 8, 18:57:47 GMT+0
Identified - The issue has been identified and a fix is being implemented. A small number of requests may have seen elevated error rates in function invocations during this period..

Jun 8, 19:04:25 GMT+0
Identified - We're continuing to work on a fix. In the meantime, deployments with multiple function regions or failover regions are being rerouted to the nearest healthy region. If your project uses only the dub1 function region, you can switch to the nearest region, lhr1, and redeploy to mitigate the issue..

Jun 8, 19:36:38 GMT+0
Monitoring - A fix has been implemented and we are monitoring the results..

Jun 8, 19:36:44 GMT+0
Monitoring - We are continuing to monitor for any further issues..

Jun 8, 20:00:11 GMT+0
Resolved - This incident has been resolved..

Duration: 1 day, 6 hours and 2 minutes

Affected Components: Resend → Email Sending → Single Email

Jun 3, 15:45:19 GMT+0
Identified - We are currently reverting a change that cause quotas to be calculated incorrectly..

Jun 3, 16:10:54 GMT+0
Monitoring - The fix has been pushed and we are now monitoring the situation..

Jun 3, 16:15:21 GMT+0
Resolved - We have resolved the underlying issue and service has been resumed..

Duration: 2 days, 11 hours and 34 minutes

Affected Components: Vercel → Functions

May 28, 16:00:14 GMT+0
Investigating - We've identified an issue where some customers may experience elevated error rates when invoking functions in the ARN1 Edge Region. We are currently investigating this issue..

May 28, 16:18:09 GMT+0
Identified - The issue has been identified and a fix is being implemented..

May 28, 16:37:04 GMT+0
Monitoring - A fix has been implemented and we are monitoring the results..

May 28, 16:59:49 GMT+0
Resolved - This incident has been resolved..

Duration: 7 hours

Affected Components: Resend → General API, Resend → Email Sending → Single Email, Resend → Email Events

May 26, 15:29:00 GMT+0
Investigating - We are currently investigating increased latency in Resend dashboard. At this time, you may experience delays and errors while trying to access our dashboard..

May 26, 15:36:00 GMT+0
Resolved - We have resolved the underlying issue and service has been resumed..

Duration: 1 hour

Affected Components: Resend → Email Events

May 20, 15:13:56 GMT+0
Completed - We've completed our Email Events maintenance, and they are now showing the up-to-date status..

May 19, 11:58:27 GMT+0
Scheduled - During the scheduled maintenance window, emails will continue to be sent. Their status will show as queued on the Dashboard and in the API. Email events will also experience delays on the Dashboard. There will be no impact on any other parts of the platform or dashboard except for the emails page..

May 20, 14:05:31 GMT+0
Identified - We are starting our planned maintenance of Email Events. During this maintenance, emails may appear as Queued while they are actually being sent. After the maintenance, the Email Events will be updated..

Duration: 13 days, 8 hours and 42 minutes

Affected Components: Vercel → Functions

May 8, 01:18:59 GMT+0
Identified - Some Vercel functions that run in the IAD1 region are experiencing elevated invocation failures. We are investigating the issue and will share more information as it becomes available..

May 8, 01:47:09 GMT+0
Identified - Traffic to the IAD1 region has been re-routed to nearby regions. Functions configured in IAD1 will be invoked in a different region if failover regions are configured, but if no other regions are configured, the function will still be invoked in IAD1..

May 8, 02:13:23 GMT+0
Identified - New messages to Vercel Workflows and Vercel Queues are being queued, but message processing is paused. Queued messages will be processed when service is restored..

May 8, 02:18:42 GMT+0
Identified - We are continuing to work on a fix for this issue..

May 8, 02:33:12 GMT+0
Identified - New workflow runs and queue messages are being processed now. Processing the backlog of existing workflow runs and queued messages is still being investigated..

May 8, 04:54:34 GMT+0
Monitoring - We implemented a fix and are monitoring the results. Backlogs for Workflows and Queues will be processed within the next few hours..

May 8, 06:39:41 GMT+0
Resolved - We've deployed mitigations and all services are operating normally. Traffic may continue to reroute to nearby regions for the next few hours, but we will restore traffic gradually after verifying system availability in the IAD1 region..

Duration: 8 days and 5 hours

Affected Components: Resend → General API, Resend → Email Sending → Single Email, Resend → Email Events

May 8, 17:47:00 GMT+0
Resolved - We have resolved the underlying issue by reverting the unintended breaking change and service has been resumed..

May 7, 14:54:00 GMT+0
Identified - 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. support@yourcompany.com) rather than the address that actually received the delivery (e.g. your Resend inbound address). Direct emails and client-side forwards were not affected..

Affected Components: Vercel → Functions

May 1, 11:30:44 GMT+0
Resolved - Between May 1, 11:01 am – May 1, 11:09 am UTC, users may have seen increased function invocation errors for traffic originated near the ICN1 Vercel CDN region. Requests to static assets/cached content were unaffected this time. We have reverted the change that caused the issue to mitigate this..

Duration: 1 day, 20 hours and 13 minutes

Affected Components: Resend → Email Events

Apr 28, 19:17:04 GMT+0
Investigating - We are currently investigating a delay in updating of email events. Emails are being sent/delivered, though the events may display as Queued..

Apr 28, 19:17:48 GMT+0
Identified - 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..

Apr 28, 19:29:26 GMT+0
Monitoring - 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..

Apr 28, 20:01:18 GMT+0
Resolved - 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..