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A sending domain is the domain that appears as the sender address in your emails (for example, you@yourdomain.com). You need to verify ownership of the domain by adding specific DNS records provided by Nuntly.
You need a Nuntly account and access to the DNS settings of the domain you want to use. If you don’t own a domain yet, register one through any domain registrar.

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Create a sending domain

1

Go to domains

In the dashboard, go to Domains.The Domains page showing the Create Sending Domain button in the bottom right corner
2

Open the creation form

Click Create Sending Domain.
3

Create your domain

Enter your domain name (for example, example.com or sending.example.com) and Click Create Domain.The Create Sending Domain dialog with the domain name input field
You are redirected to the domain detail page, where the DNS records are displayed. DKIM, SPF, and MX are required to verify the domain. DMARC is recommended but optional.

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Configure DNS records

Nuntly generates four types of DNS records that you need to add to your DNS provider:
DMARC is recommended but never required to verify your domain. Nuntly suggests a p=none starting policy, and you are free to publish a stricter policy (p=quarantine or p=reject) with a reporting address. A stricter DMARC policy never blocks domain verification.
The domain detail page showing the DNS records table with DKIM, SPF, DMARC, and MX entries

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Add records manually

For each record in the table, copy the Name and Value fields and add them as new DNS records in your provider’s control panel. The exact steps depend on your provider. Refer to their documentation for instructions.

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Import via zone file

If your DNS provider supports zone file imports, you can add all records at once:
1

Open the DNS zone

On your domain detail page, click the DNS zone button.The domain detail page showing the DNS zone button
2

Copy or download the zone file

Copy the zone file content or click Download Zone File to save it as a .zone file.The DNS zone dialog showing the generated zone file content with copy and download buttons
3

Import into your DNS provider

Import the file into your DNS provider.

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Configure via MCP

You can also set up your sending domain using the Nuntly MCP server, which allows you to manage domains through natural language commands. See the guide: Supercharge your email stack — natural language automation with Nuntly MCP server.

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Domain verification

After you add the DNS records, Nuntly automatically checks for propagation. The status badge on your domain page updates as verification progresses. DNS propagation can take anywhere from a few minutes to 48 hours depending on your provider.

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Enable open and click tracking

Once your domain is verified, you can track recipient engagement. Go to your domain detail page and toggle the switches under Measure engagement:
  • Open tracking. An event is emitted when the recipient opens your email.
  • Click tracking. An event is emitted when the recipient clicks a link in your email.
The Measure engagement section showing the open tracking and click tracking toggle switches
Tracking toggles are only available after your domain is verified.
Events generated by open and click tracking are visible in the Observability page and can be received via webhooks.

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Troubleshooting

Domain is stuck in pending verification Check that the three required DNS records (DKIM, SPF, MX) have been added correctly. Compare the Name and Value fields from the dashboard against what is configured in your DNS provider. Some providers require you to remove trailing dots from record names or values. DMARC is optional and never blocks verification, so a missing or stricter DMARC record is not a cause of stuck verification. DNS records are correct but verification hasn’t completed DNS changes can take up to 48 hours to propagate globally. If verification hasn’t completed after 48 hours and your records are correct, contact support.

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Learn more

SPF, DKIM, and DMARC standards

What RFC 7208, 6376, and 7489 actually define