> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sentfrom.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Custom domains

> Send from your own brand with full SPF, DKIM, and DMARC.

Every workspace can send on the shared `mail.sentfrom.ai` domain out of the box. To
send from your own brand — `agent@mail.yourcompany.com` — add a custom domain
(available on **Pro and up**).

<Steps>
  <Step title="Add the domain">
    In the [dashboard](https://console.sentfrom.ai) → **Domains** → add
    `mail.yourcompany.com`. SentFromAI returns the DNS records to publish.
  </Step>

  <Step title="Publish DNS records">
    Add the returned **DKIM**, **SPF/MAIL FROM**, and **DMARC** records at your DNS
    provider. SentFromAI verifies them automatically — no need to poll.
  </Step>

  <Step title="Send from it">
    Once verified, create inboxes on the domain by passing its `domain_id` to
    `POST /inboxes`.
  </Step>
</Steps>

## Reputation isolation

On **Scale and up**, your domain gets a **dedicated sending subdomain** so your
reputation is isolated from other tenants. Enterprise can run on a **dedicated IP**.

## DMARC

Custom domains are provisioned with a DMARC policy and can be ramped from
`none` → `quarantine` → `reject` as you build sending history — the safe path to a
strict, spoofing-proof posture.

<Note>
  Adding a custom domain on the Free plan returns `402 custom_domains_require_paid_plan`.
  Upgrade from the [Billing](https://console.sentfrom.ai) page.
</Note>