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

# Check a domain's email DNS (MX, SPF, DKIM, DMARC)

> One DNS-only report on whether a domain is set up to send mail convincingly, with plain-English findings worst first. DKIM is probed on a fixed list of common selectors (default, google, selector1, selector2, k1, mail, s1, dkim), since DKIM has no way to list them. Nothing connects to a mail server. Limited to 20 requests per minute per IP.



## OpenAPI

````yaml /api-reference/openapi.yaml get /v1/public/email-dns
openapi: 3.1.0
info:
  title: Server.Express API
  version: 1.0.0
  description: >-
    The customer-facing Server.Express API: auth, billing, tickets, cloud and
    dedicated servers, hosting, reselling and account management. Every response
    uses the `{ success, data | error }` envelope.
  contact:
    name: Server.Express
    url: https://server.express
servers:
  - url: https://my.server.express/api
    description: Production
security:
  - bearerAuth: []
  - apiToken: []
tags:
  - name: API Tokens
  - name: Account
  - name: Auth
  - name: Cloud
  - name: Coupons
  - name: Credits
  - name: Dashboard
  - name: Dedicated
  - name: Health
  - name: Hosting
  - name: Integrations
  - name: Invoices
  - name: Livechat
  - name: Notifications
  - name: Passkeys
  - name: Payments
  - name: Products
  - name: Public
  - name: Public Invoices
  - name: Public Tools
  - name: Reseller
  - name: SSH Keys
  - name: Services
  - name: Tasks
  - name: Teams
  - name: Tickets
  - name: Web Hosting
  - name: Webhooks
paths:
  /v1/public/email-dns:
    get:
      tags:
        - Public Tools
      summary: Check a domain's email DNS (MX, SPF, DKIM, DMARC)
      description: >-
        One DNS-only report on whether a domain is set up to send mail
        convincingly, with plain-English findings worst first. DKIM is probed on
        a fixed list of common selectors (default, google, selector1, selector2,
        k1, mail, s1, dkim), since DKIM has no way to list them. Nothing
        connects to a mail server. Limited to 20 requests per minute per IP.
      operationId: publicAuthEmailDnsCheck
      parameters:
        - name: domain
          in: query
          required: true
          schema:
            type: string
      responses:
        '200':
          description: The report.
          content:
            application/json:
              schema:
                type: object
                required:
                  - success
                  - data
                properties:
                  success:
                    type: boolean
                    const: true
                  data:
                    $ref: '#/components/schemas/PublicAuthEmailDnsReport'
        '400':
          $ref: '#/components/responses/BadRequest'
        '429':
          $ref: '#/components/responses/TooManyRequests'
        '500':
          $ref: '#/components/responses/ServerError'
      security: []
components:
  schemas:
    PublicAuthEmailDnsReport:
      type: object
      required:
        - domain
        - mx
        - spf
        - dmarc
        - dkim
        - findings
      properties:
        domain:
          type: string
          description: The cleaned-up domain that was checked.
        mx:
          type: array
          items:
            type: object
            required:
              - priority
              - host
            properties:
              priority:
                type: integer
              host:
                type: string
        spf:
          type:
            - string
            - 'null'
          description: The SPF record, or null if there isn't one.
        dmarc:
          type:
            - string
            - 'null'
          description: The DMARC record, or null if there isn't one.
        dkim:
          type: array
          items:
            type: object
            required:
              - selector
              - found
            properties:
              selector:
                type: string
              found:
                type: boolean
        findings:
          type: array
          description: Worst first. A single `ok` entry when nothing needs flagging.
          items:
            type: object
            required:
              - level
              - text
            properties:
              level:
                type: string
                enum:
                  - error
                  - warn
                  - ok
              text:
                type: string
    ErrorResponse:
      type: object
      required:
        - success
        - error
      properties:
        success:
          type: boolean
          const: false
        error:
          type: string
          description: Human-readable error message.
      additionalProperties: true
  responses:
    BadRequest:
      description: Validation failed or the request is malformed.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    TooManyRequests:
      description: Rate limit exceeded.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    ServerError:
      description: Unexpected server error.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: >-
        Session access token (JWT) from POST /v1/auth/login or /v1/auth/refresh.
        A session satisfies every API scope.
    apiToken:
      type: http
      scheme: bearer
      bearerFormat: se_live_<prefix>_<secret>
      description: >-
        Personal API token created under Settings → API tokens. Only routes
        guarded by verifyApiAuth accept it, and the token must carry the scope
        named in the operation's x-required-scope.

````

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