# POST /email/sending-domains

**Resource:** [Email](./email.md)  
**MCP tool:** `register_sending_domain`  
**Scopes:** `email-config:write`  
**Write operation:** yes

Register your own domain for sending. Returns two DNS records (a DKIM TXT and a Return-Path CNAME) to add at your DNS host — no SPF or MX change, your existing inbox keeps receiving. After adding them, call verify_sending_domain. Once verified, set it as the sending address via update_email_config { from_email_domain }.

## Parameters

| Name | In | Type | Required | Description |
|------|----|------|----------|-------------|
| `domain` | body | string | yes | Bare domain, e.g. "yourcompany.com". No scheme, no @, no path. |

## Request example

```bash
curl -X POST   "https://api.trustpager.com/functions/v1/api/v1/email/sending-domains"   -H "Authorization: Bearer YOUR_API_KEY"   -H "Content-Type: application/json"   -d '{"domain":"..."}'
```

---
Base URL: `https://api.trustpager.com/functions/v1/api/v1` — Auth: `Authorization: Bearer YOUR_API_KEY`