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

> Block one or more email domains. Use when managing the outbound-messaging exclusion list — e.g. honouring a recipient opt-out or reconciling against an external suppression system.

# Block email domains



## OpenAPI

````yaml post /blocklist/domains
openapi: 3.1.0
info:
  title: OpenCX API
  description: >

    OpenCX is an AI-powered, all-in-one platform for customer support and
    outbound communications.


    Use this API to manage your OpenCX organization's AI agents, actions,
    conversations, contacts, and more.


    To get started, generate a new API key from the dashboard.


    ## Authentication

    All API endpoints require authentication using a Bearer token. You can
    generate an API key from your OpenCX dashboard.


    ## Rate Limiting

    API requests are rate limited to ensure fair usage. The current limits are:

    - 100 requests per minute for standard endpoints

    - 1000 requests per minute for streaming endpoints


    ## Error Handling

    The API uses standard HTTP status codes and returns detailed error messages
    in the response body.
  version: 1.0-beta
  license:
    name: MIT
    url: https://opensource.org/licenses/MIT
servers:
  - url: https://api.open.cx
    description: Production
security:
  - bearerAuth: []
paths:
  /blocklist/domains:
    post:
      summary: Block email domains
      description: >-
        Block one or more email domains. Pass a comma-separated string for
        multiple domains (e.g. "spam.com, junk.org"). Messages from contacts
        with emails on these domains will be ignored.
      operationId: blockDomains
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/BlockDomainsInputDto'
      responses:
        '200':
          description: Default Response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/BlockDomainsOutput'
        '500':
          description: Internal Server Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorDto'
components:
  schemas:
    BlockDomainsInputDto:
      $schema: https://json-schema.org/draft/2020-12/schema
      $id: '#/components/schemas/BlockDomainsInputDtoInput'
      type: object
      properties:
        domains:
          type: string
          minLength: 1
          description: >-
            Domain(s) to block — comma-separated for multiple (e.g. "spam.com,
            junk.org")
        reason:
          description: Why these domains are being blocked
          type: string
      required:
        - domains
    BlockDomainsOutput:
      $schema: https://json-schema.org/draft/2020-12/schema
      $id: '#/components/schemas/BlockDomainsOutput'
      type: object
      properties:
        blocked:
          type: array
          items:
            type: object
            properties:
              id:
                type: string
                description: Block record ID
              domain:
                type: string
                description: The blocked domain
              reason:
                anyOf:
                  - type: string
                  - type: 'null'
                description: Why the domain was blocked
              created_at:
                type: string
                format: date-time
            required:
              - id
              - domain
              - reason
              - created_at
            additionalProperties: false
          description: Domains that were successfully blocked
        skipped:
          type: array
          items:
            type: string
          description: Domains that were already blocked
        summary:
          type: object
          properties:
            total:
              type: number
            blocked:
              type: number
            skipped:
              type: number
          required:
            - total
            - blocked
            - skipped
          additionalProperties: false
      required:
        - blocked
        - skipped
        - summary
      additionalProperties: false
    ErrorDto:
      type: object
      properties:
        statusCode:
          type: integer
        message:
          type: string
        error:
          type: string
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT

````