---
title: "Create a mailbox (admin)"
method: POST
path: "/v1/mailboxes"
tags: ["mailboxes"]
---

# Create a mailbox (admin)

`POST /v1/mailboxes`

## Request

- Base URL: `https://api.replylayer.ai`
- URL: `https://api.replylayer.ai/v1/mailboxes`
- Auth: HTTP bearer

## Request body

- object
  - `display_name` string
  - `domain_id` string, uuid
  - `expected_domain` string
  - `name` string, required
  - `self_hosted_imap_folder` string

## Response `201`

Created

- object
  - `address` string, required
  - `agent_authoring_mode` 'send_and_draft' | 'draft_only' | 'read_only', required
  - `agent_send_containment` boolean, required
  - `agent_send_policy` 'restricted' | 'open', required
  - `allow_thread_replies` boolean, required
  - `display_name` string, nullable, required
  - `effective_from_display` string, required
  - `hitl_mode` 'disabled' | 'all_outbound' | 'risky_only', required
  - `id` string, required
  - `last_applied_policy_mode` string, nullable, required
  - `name` string, required
  - `recipient_policy_mode` 'blocklist' | 'allowlist', required
  - `restricted_by` 'mailbox_allowlist' | 'agent_containment' | 'null', nullable, required
  - `sender_policy_mode` 'blocklist' | 'allowlist', required

## Other responses

- `400`: Validation error
- `401`: Missing or invalid API key (code: UNAUTHORIZED)
- `403`: Forbidden
- `404`: Not found
- `409`: Conflict
- `422`: Unprocessable entity
- `429`: Rate limited (code: RATE_LIMITED)
- `500`: Internal error (code: INTERNAL_ERROR)

---

[API](https://skmtc.dev/replylayer/apis/replylayer-api.md) · [All operations](https://skmtc.dev/replylayer/apis/replylayer-api/llms.txt) · [OpenAPI document](https://skmtc.dev/replylayer/apis/replylayer-api/revisions/2cae6fbd127e?raw)