Resend incident: Test domain resend.dev failing test emails

1. resolvedJul 30, 2026, 16:23 UTC

   We have resolved the underlying issue, and sending test emails from [resend.dev](http://resend.dev) has resumed.

2. identifiedJul 30, 2026, 09:58 UTC

   Performance degradation when sending test emails from the [resend.dev](http://resend.dev) domain, which is causing the API to return a validation error stating that the domain is not verified.

What APIStatus.watch saw

Our 5-minute checks didn't record a change in Resend's overall status around this incident. Smaller or regional incidents often leave a provider's overall status green.

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