`smtp_senders_off`

HTTP 409invalid_request

Sending through your own mail server is not switched on here yet.

Handling it

Fix the request and send it again. message says what is wrong, and param names the parameter where there is one. Keep the request_id: it lets Parasend find the request.

The error, as the API returns it

{
  "error": {
    "type": "invalid_request",
    "code": "smtp_senders_off",
    "message": "Sending through your own mail server is not switched on here yet.",
    "param": null,
    "request_id": "req_5e69684dc3de68bf8651a712"
  }
}