Errors

recipient_domain_refused

400 – Domain too broad. The entry is a freemail or disposable domain.

Domain too broad. Answered with 400.

What it means

The entry is a freemail or disposable domain. Allowing all of one would void the rule the Allowed Recipients exist for.

What to do

Add the exact addresses instead – individual addresses on those domains are fine.

The body

{
  "type": "https://tigby.eu/problems/recipient_domain_refused",
  "title": "Domain too broad",
  "status": 400,
  "detail": "…what was refused, naming this request's own values",
  "code": "recipient_domain_refused",
  "doc_url": "https://docs.tigby.eu/errors/recipient_domain_refused",
  "agent_hint": "…the next step, for software"
}

Branch on code. The detail names this request's own Handle, id or limit and is not part of the contract.