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

# Get a mailbox filter



## OpenAPI

````yaml https://inbound.new/openapi.json get /api/e2/mailboxes/{id}/filters/{filterId}
openapi: 3.1.0
info:
  title: Inbound Email API
  description: >+

    # Inbound API


    The Inbound API allows you to manage email infrastructure programmatically -
    domains, email addresses, webhooks, and more.


    ## Authentication


    All API requests require a Bearer token in the Authorization header:


    ```bash

    curl -H "Authorization: Bearer YOUR_API_KEY" \
      https://inbound.new/api/e2/domains
    ```


    ## Base URL


    ```

    https://inbound.new/api/e2

    ```


    ## Quick Start


    1. **Create a domain** - Register your domain with Inbound

    2. **Configure DNS** - Add the provided DNS records to your domain

    3. **Create an email address** - Set up addresses to receive emails

    4. **Create an endpoint** - Configure where emails are delivered (webhook,
    forwarding, etc.)

  version: 2.0.0
servers:
  - url: https://inbound.new
    description: Production API server
security:
  - bearerAuth: []
tags:
  - name: Webhooks
    description: Webhooks sent by Inbound to your configured endpoints when events occur.
  - name: Emails
    description: >-
      Send, list, and manage emails. Supports immediate sending, scheduling,
      replies, and retry functionality.
  - name: Mail
    description: >-
      Inbox and thread views for received emails. Filter by domain, address, or
      search.
  - name: Domains
    description: >-
      Manage domains for sending and receiving emails. Domains must be verified
      via DNS before use.
  - name: Endpoints
    description: >-
      Configure where incoming emails are delivered - webhooks, email
      forwarding, or custom handlers.
  - name: Email Addresses
    description: Create and manage email addresses on your verified domains.
  - name: Attachments
    description: Download email attachments using authenticated requests.
paths:
  /api/e2/mailboxes/{id}/filters/{filterId}:
    get:
      tags:
        - Mailboxes
      summary: Get a mailbox filter
      operationId: getApiE2MailboxesByIdFiltersByFilterId
      parameters:
        - name: id
          in: path
          required: true
          schema:
            type: string
        - name: filterId
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Response for status 200
          content:
            application/json:
              schema:
                type: object
                properties:
                  id:
                    type: string
                  name:
                    type: string
                  position:
                    type: number
                  enabled:
                    type: boolean
                  match:
                    type: string
                    enum:
                      - all
                      - any
                  conditions:
                    type: array
                    items:
                      type: object
                      properties:
                        field:
                          type: string
                          enum:
                            - from
                            - to
                            - cc
                            - recipient
                            - subject
                            - header
                            - body
                            - has_attachment
                            - size
                            - junk
                            - jev
                        operator:
                          type: string
                          enum:
                            - contains
                            - not_contains
                            - equals
                            - not_equals
                            - starts_with
                            - ends_with
                            - domain_is
                            - exists
                            - greater_than
                            - less_than
                            - gte
                        value:
                          anyOf:
                            - maxLength: 1024
                              type: string
                            - type: number
                            - type: boolean
                        header:
                          maxLength: 255
                          description: Header name, required when field is `header`
                          type: string
                        label:
                          maxLength: 64
                          description: >-
                            Jev dimension, required when field is `jev`: spam,
                            phishing, fraud, impersonation or malware
                          type: string
                      required:
                        - field
                        - operator
                  actions:
                    type: array
                    items:
                      type: object
                      properties:
                        type:
                          type: string
                          enum:
                            - move_to
                            - mark_read
                            - flag
                            - add_keyword
                            - mark_junk
                            - mark_not_junk
                            - move_to_trash
                            - stop
                        value:
                          maxLength: 1024
                          description: >-
                            Folder path for `move_to`, keyword for
                            `add_keyword`; omitted otherwise
                          type: string
                      required:
                        - type
                  stopProcessing:
                    type: boolean
                  createdAt:
                    format: date-time
                    type: string
                  updatedAt:
                    format: date-time
                    type: string
                required:
                  - id
                  - name
                  - position
                  - enabled
                  - match
                  - conditions
                  - actions
                  - stopProcessing
                  - createdAt
                  - updatedAt
        '400':
          description: Response for status 400
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: string
                required:
                  - error
        '401':
          description: Response for status 401
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: string
                required:
                  - error
        '403':
          description: Response for status 403
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: string
                required:
                  - error
        '404':
          description: Response for status 404
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: string
                required:
                  - error
        '409':
          description: Response for status 409
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: string
                required:
                  - error
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: API Key
      description: >-
        Your Inbound API key. Include it in the Authorization header as: Bearer
        <your-api-key>

````

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