Errors
recipient_invalid
400 – Not an address. One of the addresses in to, cc or bcc is not an address a message can be sent to.
Not an address. Answered with 400.
What it means
One of the addresses in to, cc or bcc is not an address a message can be sent to.
What to do
Send addresses as plain name@example.com; the detail names the one that was refused and the field it was in.
The body
{
"type": "https://tigby.eu/problems/recipient_invalid",
"title": "Not an address",
"status": 400,
"detail": "…what was refused, naming this request's own values",
"code": "recipient_invalid",
"doc_url": "https://docs.tigby.eu/errors/recipient_invalid",
"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.