E04007 — UnsupportedEmailFeature
This endpoint does not support what the request asked for: a field it cannot accept, or a combination of fields it cannot accept together.
- HTTP status: 422
- Type: validation_error
- Name: UnsupportedEmailFeature
What to do
The response message names exactly what was refused and what to send instead.
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