Resend experienced a minor incident on April 10, 2026 affecting Batch Emails and General API and 1 more component, lasting —. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Apr 10, 2026, 10:56 AM UTC
Status: Investigating 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. Affected components Broadcast Emails (Degraded performance) Batch Emails (Degraded performance) Single Email (Degraded performance)
- identified Apr 10, 2026, 11:16 AM UTC
Status: Identified We’ve identified the root cause and are working on a fix. We’ll share updates as soon as more information becomes available. Affected components Single Email (Full outage) SMTP (Full outage) Broadcast Emails (Full outage) Batch Emails (Full outage) General API (Full outage)
- monitoring Apr 10, 2026, 11:25 AM UTC
Status: Monitoring 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. Affected components General API (Full outage) Single Email (Operational) SMTP (Operational) Broadcast Emails (Operational) Batch Emails (Operational)
- monitoring Apr 10, 2026, 12:05 PM UTC
Status: Monitoring The fix has been pushed to the General API and we are now monitoring the situation. Affected components Single Email (Operational) SMTP (Operational) Broadcast Emails (Operational) Batch Emails (Operational) General API (Operational)
- resolved Apr 10, 2026, 12:20 PM UTC
Status: Resolved We have resolved the underlying issue and service has been resumed. Affected components SMTP (Operational) Broadcast Emails (Operational) Batch Emails (Operational) General API (Operational) Single Email (Operational)