Outage in Resend
Email sending error
Resolved Major
April 10, 2026 - Started 7 days ago
- Lasted about 1 hour
Incident Report
Summary AI Generated
Resend experienced a major service incident where users encountered 404 errors when attempting to send emails through both the SMTP service and API. The issue affected email sending functionality for 1.4 hours before engineers identified the root cause and applied fixes to restore service. The incident was resolved after monitoring confirmed the fixes were successful across all affected systems.
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.
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Latest Updates ( sorted recent to last )
MONITORING
7 days ago - at 04/10/2026 12:05PM
The fix has been pushed to the General API and we are now monitoring the situation.
MONITORING
7 days ago - at 04/10/2026 11:25AM
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.
IDENTIFIED
7 days ago - at 04/10/2026 11:16AM
We’ve identified the root cause and are working on a fix. We’ll share updates as soon as more information becomes available.
INVESTIGATING
7 days ago - at 04/10/2026 10:56AM
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.
Latest Resend outages
Email sending delay - 20 days ago
Email events delayed - 22 days ago
Delayed Email Events - 28 days ago
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