# email.domain.configure

Start verification of an organization-owned custom sending and receiving domain.

`POST /api/v1/accounting/email.domain.configure`

Permissions: `accounting:read`, `accounting:write`, `accounting:admin` · Roles: admin · Idempotency key required · Reaches outside Oatmilk (email or a provider)

MCP tool: `accounting_email_domain_configure`

## Fields

| Field | Type | Required | Notes |
| --- | --- | --- | --- |
| `domain` | string | Yes | 4–253 characters. |
| `idempotencyKey` | string | Yes | Any unique text you generate once per intended change, so a retried request only happens once. Send it as the Idempotency-Key header instead if you prefer; if you send both they must match. 8–200 characters. |

## Example request

```bash
curl https://app.getoatmilk.com/api/v1/accounting/email.domain.configure \
  -H "Authorization: Bearer $OATMILK_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
  "domain": "example"
}'
```

Reference page: https://app.getoatmilk.com/docs/api/email.domain.configure