Send several at once

POST /emails/batch — an array of the same objects, up to 100.

{
  "data": [
    { "id": "1043", "status": "queued" },
    { "id": "", "status": "validation_error" },
    { "id": "1044", "status": "queued" }
  ]
}

Results are positional and each message is queued independently. An entry with an empty id failed and its status carries the reason — one bad address does not discard the rest.