E04008 — EmailBackendUnavailable
Email is temporarily unavailable.
- HTTP status: 503
- Type: service_unavailable_error
- Name: EmailBackendUnavailable
What to do
This is on our side and usually clears in a moment. Retry with backoff, reusing the same Idempotency-Key so a retry cannot send twice.
Related
- E04xxx — Email sending & delivery: every code in this range
- Errors: the full wire contract, status mapping, and error catalog
- Error handling: branching on type and code, validation details, and vendor_code