> ## Documentation Index
> Fetch the complete documentation index at: https://resend.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Send Draft

> Send an existing draft from the inbox address.

export const ResendParamField = ({children, body, path, ...props}) => {
  const [lang, setLang] = useState(() => {
    return localStorage.getItem('code') || '"Node.js"';
  });
  useEffect(() => {
    const onStorage = event => {
      const key = event.detail.key;
      if (key === 'code') {
        setLang(event.detail.value);
      }
    };
    document.addEventListener('mintlify-localstorage', onStorage);
    return () => {
      document.removeEventListener('mintlify-localstorage', onStorage);
    };
  }, []);
  const toCamelCase = str => typeof str === 'string' ? str.replace(/[_-](\w)/g, (_, c) => c.toUpperCase()) : str;
  const resolvedBody = useMemo(() => {
    const value = JSON.parse(lang);
    return value === 'Node.js' ? toCamelCase(body) : body;
  }, [body, lang]);
  const resolvedPath = useMemo(() => {
    const value = JSON.parse(lang);
    return value === 'Node.js' ? toCamelCase(path) : path;
  }, [path, lang]);
  return <ParamField body={resolvedBody} path={resolvedPath} {...props}>
      {children}
    </ParamField>;
};

<Warning>
  Inboxes are currently in private beta and only available to a limited
  number of users. The response shape might change before GA.

  <span />

  [Get early access](https://resend.com/settings/labs) if you're interested in testing this feature.

  <span />

  Once you have access, upgrade your Resend SDK to use the new methods:

  <CodeGroup>
    ```bash Node.js theme={"theme":{"light":"github-light","dark":"vesper"}}
    npm install resend@6.33.0
    ```

    ```bash CLI theme={"theme":{"light":"github-light","dark":"vesper"}}
    npm install -g resend-cli@2.25.0
    ```
  </CodeGroup>
</Warning>

Sends the draft from the inbox address. A reply draft is sent in its thread. A
draft without a thread starts a new thread. Attachments saved on the draft are
sent with it.

The draft must have at least one `to` recipient, a non-empty `subject`, and
`html` or `text`, or the request returns a `422`. A draft that was already sent
returns a `409`.

A reply draft is sent with the same `In-Reply-To` and `References` headers as
[Reply to Thread Email](/docs/api-reference/inboxes/reply-thread-email). A draft for
a new conversation has neither.

## Path Parameters

<ResendParamField path="inbox_id" type="string" required>
  The Inbox ID. An email address is not accepted.
</ResendParamField>

<ResendParamField path="draft_id" type="string" required>
  The Draft ID.
</ResendParamField>

## Body Parameters

The request body is optional and takes only `headers`. Without headers, send no
body.

<ParamField body="headers" type="object">
  Custom headers to add to the email. Resend sets the `In-Reply-To`,
  `References`, and `Reply-To` headers, so you cannot set them here. Sending one
  of them, in any letter case, returns a `422`. A header name cannot be empty,
  and names and values cannot contain line breaks or null characters, or the
  request returns a `422`.
</ParamField>

## Headers

<ParamField header="Idempotency-Key" type="string">
  Add an idempotency key to prevent duplicated emails.

  * Should be **unique per API request**
  * Idempotency keys expire after **24 hours**
  * Have a maximum length of **256 characters**
  * A retry with the same key returns the first successful response, with the
    `idempotent-replayed: true` header
  * A failed request is not stored, so you can retry it with the same key
  * Reusing the key with a different body, or while the first request is still
    running, returns a `409`

  [Learn more](/docs/dashboard/emails/idempotency-keys)
</ParamField>

## Response Fields

<ParamField body="id" type="string">
  The ID of the sent email. Use it with the [emails
  endpoints](/docs/api-reference/emails/retrieve-email).
</ParamField>

<RequestExample>
  ```ts Node.js theme={"theme":{"light":"github-light","dark":"vesper"}}
  import { Resend } from 'resend';

  const resend = new Resend('re_xxxxxxxxx');

  const { data, error } = await resend.inboxes.drafts.send({
    inboxId: 'b3e2b2b6-3f0e-4c8e-9ad3-2f43a1e2c7f1',
    draftId: 'c3a1e8b4-2d5f-4a7c-9e10-6b8d7f5a4c32',
  });
  ```

  ```bash cURL theme={"theme":{"light":"github-light","dark":"vesper"}}
  curl -X POST 'https://api.resend.com/inboxes/b3e2b2b6-3f0e-4c8e-9ad3-2f43a1e2c7f1/drafts/c3a1e8b4-2d5f-4a7c-9e10-6b8d7f5a4c32/send' \
       -H 'Authorization: Bearer re_xxxxxxxxx'
  ```

  ```bash CLI theme={"theme":{"light":"github-light","dark":"vesper"}}
  resend inboxes drafts send b3e2b2b6-3f0e-4c8e-9ad3-2f43a1e2c7f1 c3a1e8b4-2d5f-4a7c-9e10-6b8d7f5a4c32
  ```
</RequestExample>

<ResponseExample>
  ```json Response theme={"theme":{"light":"github-light","dark":"vesper"}}
  {
    "id": "6a0c8e58-3d9e-4f7a-8b14-2e3f4a5b6c71"
  }
  ```
</ResponseExample>