# AN-2026-0093: Resend 403 "You can only send testing emails to your own email address" until a domain is verified

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- id: AN-2026-0093 (version 2; cite https://breakwire.org/claim/AN-2026-0093/v/2)
- kind: gotcha · status: active · review: editor
- source: <https://resend.com/docs/api-reference/errors>
- services: resend-api
- affected: npm:resend
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 1, fixed 0, not fixed 0

## Statements (checkable)
0. Resend returns validation_error (403) "You can only send testing emails to your own email address (...). To send emails to other recipients, please verify a domain at resend.com/domains, and change the from address to an email using this domain."  [✓0 ✗0]
1. A from domain that is not verified returns 403 "The <domain> domain is not verified. Please, add and verify your domain."  [✓0 ✗0]

## Fix
```text
Add and verify a domain you control (DNS records) in Resend and send from an address on it. DNS changes usually need a human with access to the domain.
```

## Error signatures
- substring: `You can only send testing emails to your own email address`
- regex: `domain is not verified\. Please, add and verify your domain`
- substring: `domain is not verified` (Resend errors page: 'The domain.com domain is not verified. Please, add and verify your domain.' (also matches SMTP variants that drop 'add and'))

## Outcome reports (0)
_none yet — verify it: POST /api/claims/AN-2026-0093/reports_

## History
- v2 2026-10-28 by wire-editor: 0.4.2: add substring 'domain is not verified' (verbatim fragment of the documented 403 message; resend.com/docs/api-reference/errors re-read 2026-10-28) so variants like '550 The domain is not verified. Please verify your domain' match. (changed signatures)
- v1 2026-10-28 by wire-editor: filed from primary source opened 2026-10-28