---
title: "Create Mailbox"
full: true
_openapi:
  method: POST
  toc: []
  structuredData:
    headings: []
    contents:
      - content: "Register a new email mailbox for the active organization under a verified domain"
_apiData:
  document: "https://reloop.sh/api/inbox/openapi/json"
  operationData: [{"path":"/api/inbox/v1/mailboxes/create","method":"post"}]
  parameterList: [{"name":"domainId","type":"string","required":true,"description":"Associated verified Domain ID","location":"body"},{"name":"email","type":"string","required":true,"description":"Full email address for the mailbox","location":"body"},{"name":"password","type":"string","required":false,"description":"Mailbox password","location":"body"},{"name":"quota","type":"string","required":false,"description":"Storage quota, defaults to 5 GB","location":"body"},{"name":"displayName","type":"string","required":false,"description":"Friendly name of the mailbox sender","location":"body"}]
  responseMap: {"200":{"description":"Response for status 200","schema":{"id":"con_123456789","email":"john.doe@example.com","status":"example_status"}},"400":{"description":"Response for status 400","schema":{"message":"Contact already exists","why":"A contact with this email already exists in your organization.","fix":"Use a different email address or update the existing contact instead.","link":"https://reloop.sh/docs/api/contacts"}},"401":{"description":"Response for status 401","schema":{"message":"Contact already exists","why":"A contact with this email already exists in your organization.","fix":"Use a different email address or update the existing contact instead.","link":"https://reloop.sh/docs/api/contacts"}},"403":{"description":"Response for status 403","schema":{"message":"Contact already exists","why":"A contact with this email already exists in your organization.","fix":"Use a different email address or update the existing contact instead.","link":"https://reloop.sh/docs/api/contacts"}},"409":{"description":"Response for status 409","schema":{"message":"Contact already exists","why":"A contact with this email already exists in your organization.","fix":"Use a different email address or update the existing contact instead.","link":"https://reloop.sh/docs/api/contacts"}},"500":{"description":"Response for status 500","schema":{"message":"Contact already exists","why":"A contact with this email already exists in your organization.","fix":"Use a different email address or update the existing contact instead.","link":"https://reloop.sh/docs/api/contacts"}}}
  codeSamples:
    - id: node
      lang: javascript
      label: Node.js
      source: |-
        import { Reloop } from "reloop-email";
        
        const reloop = new Reloop({ apiKey: "rl_123456789" });
        
        const { mailbox, mailboxError } = await reloop.inbox.mailboxes.create({
          domainId: "dom_123456789",
          email: "support@example.com",
          displayName: "Support",
        });
        if (mailboxError) throw mailboxError;
    - id: curl
      lang: bash
      label: cURL
      source: |-
        curl -X POST https://reloop.sh/api/inbox/v1/mailboxes/create \
          -H "x-api-key: rl_123456789" \
          -H "Content-Type: application/json" \
          -d '{"domainId":"dom_123456789","email":"support@example.com","displayName":"Support"}'
    - id: python
      lang: python
      label: Python
      source: |-
        from reloop_email import Reloop
        
        reloop = Reloop(api_key="rl_123456789")
        
        result = reloop.inbox.mailboxes.create({
          "domainId": "dom_123456789",
          "email": "support@example.com",
          "displayName": "Support",
        })
        if result.mailbox_error:
            raise result.mailbox_error
    - id: php
      lang: php
      label: PHP
      source: |-
        <?php
        
        require 'vendor/autoload.php';
        
        use Reloop\Reloop;
        
        $reloop = Reloop::client('rl_123456789');
        
        $mailbox = $reloop->inbox->mailboxes->create([
            'domainId' => 'dom_123456789',
            'email' => 'support@example.com',
            'displayName' => 'Support',
        ]);
    - id: java
      lang: java
      label: Java
      source: |-
        import sh.reloop.ReloopClient;
        ReloopClient reloop = new ReloopClient("rl_123456789");
        
        CreateMailboxParams params = new CreateMailboxParams();
        params.domainId = "dom_123456789";
        params.email = "support@example.com";
        params.displayName = "Support";
        var mailbox = reloop.inbox.mailboxes.create(params);
---
> For the complete documentation index, see [llms-docs.txt](/llms-docs.txt) or the site index [llms.txt](/llms.txt). Full docs corpus: [llms-full-docs.txt](/llms-full-docs.txt). Prefer markdown URLs (append `.md`) for agent consumption. Product skill: [skill.md](/skill.md).


{/* This file was generated by the OpenAPI doc generator. Do not edit this file directly. Run `bun run generate:api-docs` to regenerate. */}

<APIPage />