---
title: "Set Sender Domain"
method: PUT
path: "/api/branding/sender-domain"
tags: ["branding"]
---

# Set Sender Domain

`PUT /api/branding/sender-domain`

## Request

- Base URL: `https://zsign.io` (the document declares no server; this is the origin it was published from)
- URL: `https://zsign.io/api/branding/sender-domain`
- Auth: HTTP bearer

Register a custom email sending domain with Resend (white-label only).

## Request body

- SenderDomainUpdate
  - `domain` string, required

## Response `200`

Successful Response

- SenderDomainResponse
  - `sender_domain` string, nullable, required
  - `sender_domain_verified` boolean
  - `records` object[]

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/zsign/apis/zsign-api.md) · [All operations](https://skmtc.dev/zsign/apis/zsign-api/llms.txt) · [OpenAPI document](https://skmtc.dev/zsign/apis/zsign-api/revisions/a674ac4137ba?raw)