Errors

Mailofly uses conventional HTTP response codes to indicate request success or failure.

Status Codes

Code	Meaning
`200 OK`	Request succeeded.
`201 Created`	Resource created successfully.
`400 Bad Request`	Missing or malformed parameters.
`401 Unauthorized`	Missing or invalid API key.
`403 Forbidden`	Sender domain not verified or permission denied.
`404 Not Found`	Requested resource ID does not exist.
`429 Too Many Requests`	Rate limit exceeded.
`500 Internal Error`	Mailofly server issue.

{
  "statusCode": 400,
  "message": "The 'to' field must contain at least one valid email address.",
  "name": "validation_error"
}