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

# Sending domain

> Authenticate your domain with DNS so your email lands in the inbox.

Your **sending domain** is the domain your email is sent from. Authenticating it with DNS records tells mailbox providers your mail is legitimate, which is essential for deliverability. Configure it in **Settings → Domain**.

## Choose a domain

| Option            | When to use                                                                          |
| ----------------- | ------------------------------------------------------------------------------------ |
| **Custom domain** | Recommended for production. Send from your own domain (e.g. `mail.yourcompany.com`). |
| **System domain** | Get started quickly on `your-workspace.railmail.com`. Carries Railmail branding.     |

## Verify with DNS

<Steps>
  <Step title="Copy the records">
    Railmail shows the **SPF, DKIM and DMARC** records to add. For each, note its **name**, **value** and **TTL**.
  </Step>

  <Step title="Add them at your DNS provider">
    Create the records in your domain's DNS settings. Changes can take some time to propagate.
  </Step>

  <Step title="Verify">
    Back in Railmail, click **Verify DNS**. Once the records are found, the domain becomes verified.
  </Step>
</Steps>

Railmail also shows a **domain health / reputation score** so you can monitor how mailbox providers view your domain.

## Warming

New domains are **warmed**: they send under a daily quota that increases over time, moving from an initial phase toward a mature one. This protects your sender reputation. You can monitor the daily limit, bounce rate and complaint rate, and **pause or resume** warming.

<Warning>
  The warming quota can cap how many recipients a campaign reaches per day. If a send is limited, that's expected during warming.
</Warning>

## Domain statuses

| Status               | Meaning                                 |
| -------------------- | --------------------------------------- |
| Active               | Verified and sending.                   |
| Pending verification | Waiting for DNS records to be found.    |
| Verification failed  | Records not found or incorrect.         |
| Degraded             | Reputation or configuration issue.      |
| Suspended / Blocked  | Sending stopped due to a serious issue. |
| Expired              | Verification needs to be renewed.       |

## Email footer

Under **Settings → Email**, configure the compliant footer added to every email: company name and address, and the wording for the unsubscribe and preference-center links (always included). You can add custom footer text, and remove the *Powered by Railmail* badge on paid plans.