E12017 — SMSSenderReserved
This sender identity is reserved and cannot be used as a sender.
- HTTP status: 422
- Type: validation_error
- Name: SMSSenderReserved
What to do
Choose a different sender; this identity is reserved and cannot be used.
Related
- E12xxx — SMS 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