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.
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The fix has been pushed to the General API and we are now monitoring the situation.
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.
We’ve identified the root cause and are working on a fix. We’ll share updates as soon as more information becomes available.
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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