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

# Update a draft (alias)

> Identical to `PUT`; both apply a partial update to the supplied fields.



## OpenAPI

````yaml /openapi/generated/email/inboxes.yml patch /email_inboxes/{inbox_id}/drafts/{draft_id}
openapi: 3.1.0
info:
  contact:
    email: support@telnyx.com
  description: API for managing email inboxes, drafts, messages, filters, and threads.
  title: Telnyx Email Inboxes API
  version: 2.0.0
servers:
  - url: https://api.telnyx.com/v2
security:
  - bearerAuth: []
paths:
  /email_inboxes/{inbox_id}/drafts/{draft_id}:
    patch:
      tags:
        - Email Drafts
      summary: Update a draft (alias)
      description: Identical to `PUT`; both apply a partial update to the supplied fields.
      operationId: PatchEmailDraft
      parameters:
        - $ref: '#/components/parameters/DraftInboxId'
        - $ref: '#/components/parameters/DraftId'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/EmailDraftRequest'
      responses:
        '200':
          description: The updated draft.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/EmailDraftResponse'
        '401':
          $ref: '#/components/responses/email_UnauthorizedResponse'
        '404':
          $ref: '#/components/responses/email_NotFoundResponse'
        '422':
          $ref: '#/components/responses/ValidationErrorResponse'
        '503':
          $ref: '#/components/responses/DraftUnavailableResponse'
components:
  parameters:
    DraftInboxId:
      name: inbox_id
      in: path
      required: true
      description: Email inbox UUID.
      schema:
        type: string
        format: uuid
    DraftId:
      name: draft_id
      in: path
      required: true
      description: Email draft UUID.
      schema:
        type: string
        format: uuid
  schemas:
    EmailDraftRequest:
      type: object
      description: >
        All fields are optional — a draft may be saved incomplete. `account_id`,

        `inbox_id`, `status`, `sent_at`, `sent_message_id`,
        `reply_to_message_id` and

        `thread_id` are server-owned and ignored if supplied.
      properties:
        from_email:
          type: string
        from_name:
          type: string
        to:
          type: array
          items:
            $ref: '#/components/schemas/EmailAddressInput'
        cc:
          type: array
          items:
            $ref: '#/components/schemas/EmailAddressInput'
        bcc:
          type: array
          items:
            $ref: '#/components/schemas/EmailAddressInput'
        reply_to:
          type: string
        subject:
          type: string
          maxLength: 255
        text_body:
          type: string
        html_body:
          type: string
        text:
          type: string
          description: Alias for `text_body`, matching the send endpoint.
        html:
          type: string
          description: Alias for `html_body`, matching the send endpoint.
        headers:
          type: object
          additionalProperties:
            type: string
        attachments:
          type: array
          items:
            type: object
        labels:
          type: array
          items:
            type: string
        tags:
          type: array
          items:
            type: string
        metadata:
          type: object
    EmailDraftResponse:
      type: object
      properties:
        data:
          $ref: '#/components/schemas/EmailDraft'
      required:
        - data
    EmailAddressInput:
      oneOf:
        - type: string
        - $ref: '#/components/schemas/EmailAddress'
    EmailDraft:
      type: object
      description: An unsent, mutable draft message belonging to an inbox.
      properties:
        record_type:
          type: string
          enum:
            - email_draft
        id:
          type: string
          format: uuid
        inbox_id:
          type: string
          format: uuid
        status:
          type: string
          enum:
            - draft
            - sending
            - sent
          description: >
            `draft` until the draft is sent. A sent draft is retained for audit
            and

            becomes immutable.
        from:
          type:
            - string
            - 'null'
          description: >-
            Sender address. Defaults to the inbox address at send time when
            null.
        from_name:
          type:
            - string
            - 'null'
        to:
          type: array
          items:
            $ref: '#/components/schemas/EmailAddress'
        cc:
          type: array
          items:
            $ref: '#/components/schemas/EmailAddress'
        bcc:
          type: array
          items:
            $ref: '#/components/schemas/EmailAddress'
        reply_to:
          type:
            - string
            - 'null'
        subject:
          type:
            - string
            - 'null'
        text_body:
          type:
            - string
            - 'null'
        html_body:
          type:
            - string
            - 'null'
        headers:
          type: object
          additionalProperties:
            type: string
          description: Custom headers. Reply drafts carry `In-Reply-To` and `References`.
        attachments:
          type: array
          items:
            type: object
        labels:
          type: array
          items:
            type: string
          description: >-
            Mutable mailbox-state labels. Not propagated to Email Detail
            Records.
        tags:
          type: array
          items:
            type: string
          description: >-
            Transport/reporting attribution tags, propagated to Email Detail
            Records at send time.
        metadata:
          type: object
          description: Arbitrary customer-defined metadata.
        reply_to_message_id:
          type:
            - string
            - 'null'
          format: uuid
          description: >-
            Inbound message this draft replies to. Server-owned; set only on
            reply drafts.
        thread_id:
          type:
            - string
            - 'null'
          format: uuid
          description: Conversation thread inherited from the parent message.
        sent_message_id:
          type:
            - string
            - 'null'
          format: uuid
          description: The email message created when this draft was sent.
        sent_at:
          type:
            - string
            - 'null'
          format: date-time
        created_at:
          type: string
          format: date-time
        updated_at:
          type: string
          format: date-time
      required:
        - record_type
        - id
        - inbox_id
        - status
    email_ErrorResponse:
      type: object
      properties:
        errors:
          type: array
          items:
            $ref: '#/components/schemas/ErrorObject'
        suppressed:
          type: array
          description: >-
            Present when every recipient is suppressed, so the request is
            rejected and no message is created.
          items:
            $ref: '#/components/schemas/SuppressedRecipient'
      required:
        - errors
    EmailAddress:
      type: object
      properties:
        email:
          type: string
        name:
          type: string
      required:
        - email
    ErrorObject:
      type: object
      properties:
        code:
          type: string
          description: >-
            Telnyx error code. Edge idempotency errors use 10027 or 10036.
            Fallback 404/500 responses from the framework may use string status
            codes ('404', '500') instead.
          enum:
            - '10001'
            - '10006'
            - '10007'
            - '10015'
            - '10016'
            - '10019'
            - recipient_suppressed
            - reputation_suspended
            - '404'
            - '500'
            - '10027'
            - '10036'
        title:
          type: string
        detail:
          description: >-
            Human-readable error detail. Changeset responses may return a
            structured object.
          oneOf:
            - type: string
            - type: object
              additionalProperties: true
        source:
          type:
            - object
            - 'null'
          additionalProperties: true
        meta:
          type:
            - object
            - 'null'
          additionalProperties: true
          description: Additional metadata. Present on 401 errors with a documentation URL.
      required:
        - code
        - title
        - detail
    SuppressedRecipient:
      type: object
      properties:
        to:
          type: string
          format: email
          description: Suppressed recipient email address.
        reason:
          type: string
          description: Suppression reason returned by the recipient suppression service.
        scope:
          type: string
          description: Scope at which the suppression applies.
        override_allowed:
          type: boolean
          description: Whether an authorized send may override this suppression.
      required:
        - to
        - reason
        - scope
        - override_allowed
  responses:
    email_UnauthorizedResponse:
      description: Not authorized (10006).
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/email_ErrorResponse'
          example:
            errors:
              - code: '10006'
                title: Not authorized
                detail: Invalid API key
                meta:
                  url: https://developers.telnyx.com/docs/overview/errors/10006
    email_NotFoundResponse:
      description: Resource not found (10001).
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/email_ErrorResponse'
          example:
            errors:
              - code: '10001'
                title: Not Found
                detail: The requested resource was not found
    ValidationErrorResponse:
      description: Validation Failed (10015) or changeset validation error.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/email_ErrorResponse'
          example:
            errors:
              - code: '10015'
                title: Validation Failed
                detail: subject can't be blank
                source:
                  pointer: /data/attributes/subject
    DraftUnavailableResponse:
      description: Drafts or the email domain service are temporarily unavailable (10016).
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/email_ErrorResponse'
          example:
            errors:
              - code: '10016'
                title: Service Unavailable
                detail: Drafts are temporarily unavailable. Please try again later.
  securitySchemes:
    bearerAuth:
      scheme: bearer
      type: http

````