---
title: "How do I set up a sending subdomain in Sarbacane Campaigns?"
description: "Send your campaigns from a subdomain of your website: creation in Sarbacane, TXT and NS records, validation."
url: https://help.sarbacane.com/en/articles/176-how-do-i-set-up-a-sending-subdomain-in-sarbacane-campaigns
collection: "Settings"
updated: 2026-11-02
language: en
alternates: [fr, es]
---

# How do I set up a sending subdomain in Sarbacane Campaigns?

Send your campaigns from a subdomain of your website: creation in Sarbacane, TXT and NS records, validation.

To send your campaigns with your own domain name, create a sending subdomain (for example news.your-site.com) in Sarbacane Campaigns, then add two types of records with your hosting provider. Allow about ten minutes to enter them, then up to 48 hours for validation.

## Prerequisites

-   You are the account owner or an administrator.
    
-   You own a domain name, for example the one of your website.
    
-   You have access to this domain's DNS zone at your hosting provider, or help from your IT department or webmaster. Sarbacane cannot add these records for you.
    
-   Your hosting provider accepts NS records on a subdomain (see Related articles).
    
-   The domain applies to your whole account: Sarbacane Campaigns, Sarbacane Pages and Sarbacane Forms.
    

## Steps

1.  In Sarbacane Campaigns, in the left sidebar, click the gear icon (**Settings**).
    
2.  In the left menu, click Domains.
    
3.  Above the list of domains, click **Add a domain**.
    

![Domains page in Sarbacane Campaigns](https://staticfiles.gleap.io/helpcenter/683050d8834924b5aeaea8b7/20260325204839_8442.png)

4.  Under **Existing domain**, click **Select**. The **Configuration of your domain by delegation** window opens.
    

![Existing domain option](https://staticfiles.gleap.io/helpcenter/683050d8834924b5aeaea8b7/20260325204839_5075.jpg)

**Important**: add the records with your hosting provider within 48 hours of creating the subdomain. After that, the subdomain is not validated and you must delete it and create it again.

5.  In **Step 1: create a subdomain**, enter the subdomain to use (for example news.your-site.com), then click **Check**.
    
6.  In **Step 2: add this TXT record at your provider.**, click the value to copy it. Add it with your hosting provider as a TXT record on the root of your domain (your-site.com), not on the subdomain.
    

![TXT record to add](https://staticfiles.gleap.io/helpcenter/683050d8834924b5aeaea8b7/20260325205803_0460.png)

7.  Click **Next**.
    
8.  In **Step 3: add these NS records to the configuration of your domain**, copy the two values. Add them with your hosting provider as NS records on the subdomain (news.your-site.com).
    

**Note**: the two NS values are always dns.customizedurl.com. and dns2.customizedurl.com. Enter them with the final dot, otherwise the delegation does not work.

![NS records to add](https://staticfiles.gleap.io/helpcenter/683050d8834924b5aeaea8b7/20260325205803_0477.png)

9.  Click **Save**.
    
10.  Once the domain is active, at the top right of the Domains page, select it in the **Default domain** list to apply it to all your sends.
     

![Default domain list](https://staticfiles.gleap.io/helpcenter/683050d8834924b5aeaea8b7/20260325204839_6264.png)

**Note**: the default domain is visible to and usable by all users of the account.

## Expected result

The subdomain appears in the list with the type **Delegation** and the state **Awaiting validation...** It changes to **Activated** once the records have propagated, usually within 48 hours.

**Best practice**: before your first large sends, increase your volumes gradually (see [Warming up a sending domain or subdomain](https://help.sarbacane.com/en/articles/111.md)).

## Troubleshooting

### A message says the subdomain is already registered

This subdomain already exists in your account. Check the list on the Domains page.

### My subdomain stays in the Invalid state

Follow the checks in the article [Why does my subdomain remain in "Invalid" status?](https://help.sarbacane.com/en/articles/179.md).

### My hosting provider does not accept NS records

Write to technical support at aide@sarbacane.com.

## Related articles

-   [Configure my subdomain with my hosting provider](https://help.sarbacane.com/en/articles/177.md)
    
-   [Why does my subdomain remain in "Invalid" status?](https://help.sarbacane.com/en/articles/179.md)
    
-   [Warming up a sending domain or subdomain](https://help.sarbacane.com/en/articles/111.md)