> ## Documentation Index > Fetch the complete documentation index at: https://pigeonpost-developer.27communication.com/llms.txt > Use this file to discover all available pages before exploring further. # Update a draft > The fields you send replace the draft's; the rest is kept. The draft is saved again in the mailbox, so it gets a **new `id`** (the old one no longer works). ## OpenAPI ````yaml /api-reference/openapi.yaml patch /{account_id}/drafts/{draft_id} openapi: 3.1.0 info: title: PigeonPost API version: 1.0.0 description: > Connect your users' mailboxes (Gmail with an app password, and any IMAP/SMTP provider), read, send and manage their email, and receive webhooks when something changes. The API follows Unipile's v2 conventions (ids, lists, events); its own version is v1. **Authentication:** every request needs your access token in the `X-API-KEY` header. Create tokens in your dashboard under **API keys**, or with `POST /api/v1/api-keys`. **Base URL:** `https://{your DSN}/api/v1`. Your DSN is shown in your dashboard. **Emails follow Unipile's v2 email API:** the account goes in the path (`/api/v1/{account_id}/emails`, `/emails/send`, `/folders`, `/drafts`), with separate read, unread, modify and thread actions. IMAP only. **Ids** carry their type: `acc_…` (account), `email_…`, `att_…` (attachment), `fld_…` (folder), `drf_…` (draft), `we_…` (webhook endpoint), `evt_…` (event), `pk_…` (API key). **Lists** are `{ "object": "", "data": [...], "has_more": true|false }`. Accounts, webhook endpoints, conversations and API keys page with `offset` and `limit`. Emails, drafts and contacts page with a `cursor`: pass the `cursor` of a response back to get the next page. **Errors** always have the same JSON shape: `status`, `type`, `title`, `detail`. servers: - url: https://{dsn}/api/v1 description: Your workspace's DSN, from your dashboard variables: dsn: default: mail-api.example.com description: Your DSN, for example mail-api.example.com security: - apiKey: [] tags: - name: Auth description: Connect a mailbox from your app (IMAP/SMTP). - name: Accounts description: The mailboxes connected to your workspace. - name: Emails description: Read, search, send, change and delete emails. - name: Attachments description: Download the files attached to an email. - name: Drafts description: Drafts saved in the user's mailbox. - name: Folders description: Folders (Gmail labels appear as folders over IMAP). - name: Contacts description: The people an account has emailed with. - name: Webhooks description: Get notified when something happens in a mailbox. - name: API keys description: Access tokens for this API. paths: /{account_id}/drafts/{draft_id}: parameters: - $ref: '#/components/parameters/account_id' - $ref: '#/components/parameters/draft_id' patch: tags: - Drafts summary: Update a draft description: > The fields you send replace the draft's; the rest is kept. The draft is saved again in the mailbox, so it gets a **new `id`** (the old one no longer works). operationId: updateDraft requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/SendInput' responses: '200': description: Updated. content: application/json: schema: $ref: '#/components/schemas/DraftResult' '400': $ref: '#/components/responses/BadRequest' '401': $ref: '#/components/responses/InvalidCredentials' '404': $ref: '#/components/responses/NotFound' '502': $ref: '#/components/responses/ProviderError' components: parameters: account_id: name: account_id in: path required: true description: The account's `acc_…` id. schema: type: string example: acc_ba1fa6938d8548298e8ce62e4b4b4e99 draft_id: name: draft_id in: path required: true description: The `drf_…` id from creation, or the synced draft's `email_…` id. schema: type: string example: drf_r-4419383208612875012 schemas: SendInput: type: object properties: to: type: array items: $ref: '#/components/schemas/Recipient' cc: type: array items: $ref: '#/components/schemas/Recipient' bcc: type: array items: $ref: '#/components/schemas/Recipient' reply_to: type: array items: $ref: '#/components/schemas/Recipient' description: The Reply-To header's addresses. from: type: object properties: display_name: type: string email: type: string description: Sender name; `email` can set a send-as alias. subject: type: string html: type: string description: HTML body. plain_text: type: string description: Plain-text body (made from `html` when left out). reply_to_message_id: type: string description: 'The email you answer: its Message-ID, or its `email_…` id.' custom_headers: type: array items: type: object properties: name: type: string value: type: string description: >- X-…, List-Unsubscribe, List-Unsubscribe-Post, Auto-Submitted (no, auto-replied, auto-generated, auto-notified) or Reply-To. metadata: type: string maxLength: 1000 description: >- Your note about this email (never in the email), returned as `sent_by.metadata` on its Sent copy. tracking_options: type: object properties: opens: type: boolean links: type: boolean label: type: string custom_domain: type: string attachments: type: array items: type: object required: - content properties: filename: type: string content_type: type: string content: type: string contentEncoding: base64 DraftResult: type: object properties: object: type: string enum: - DraftCreated - DraftUpdated id: type: string description: '`drf_…`, the draft''s id.' account_id: type: string draft_id: type: string description: '`drf_…`' previous_draft_id: type: string description: 'After an update: the old id, which no longer works.' message_id: type: string tracking_id: type: - string - 'null' Recipient: type: object description: A recipient when sending. properties: email: type: string format: email display_name: type: string required: - email Error: type: object properties: status: type: integer type: type: string enum: - errors/invalid_parameters - errors/unauthorized - errors/invalid_credentials - errors/not_found - errors/already_exists - errors/provider_rejected - errors/provider_error - errors/unexpected_error title: type: string detail: type: string responses: BadRequest: description: A parameter is missing or wrong. `detail` says which. content: application/json: schema: $ref: '#/components/schemas/Error' example: status: 400 type: errors/invalid_parameters title: Invalid parameters detail: limit must be between 1 and 250 InvalidCredentials: description: >- `errors/invalid_credentials`: the mail provider rejected the account's password or token; reconnect it. (`errors/unauthorized`: a bad access token.) content: application/json: schema: $ref: '#/components/schemas/Error' example: status: 401 type: errors/invalid_credentials title: Invalid credentials detail: 'the mail provider rejected the credentials: invalid_grant' NotFound: description: Nothing with this id (a malformed or wrong-type id is also not found). content: application/json: schema: $ref: '#/components/schemas/Error' example: status: 404 type: errors/not_found title: Not found detail: email email_94a0d77db739407e932c3b97fef44aac not found ProviderError: description: The mail provider failed or didn't answer. Try again later. content: application/json: schema: $ref: '#/components/schemas/Error' example: status: 502 type: errors/provider_error title: Mail provider error detail: timed out talking to imap.example.com securitySchemes: apiKey: type: apiKey in: header name: X-API-KEY description: Your access token, from your dashboard under **API keys**. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.