# Custom Tracking URLs

When using Whitelabel URLs, subscribers will only see your domain for all links from within your email.

This also gives you the advantage of higher control of your deliverability by controlling the domains that appear in your emails.

![](/files/2oRZKItUy0BKWxYG1VVT)

You need to be the owner of the domain you want to use. Set up a CNAME record, so that your domain points to Mailblast before entering it in the configuration panel.

Go to the DNS configuration panel of your DNS provider and enter in the following:

| Name/Host   | Enter in the subdomain you want to use e.g "emails" or "tracking" |
| ----------- | ----------------------------------------------------------------- |
| Value       | [www.mailblast.io](http://www.mailblast.io)                       |
| Record Type | Set this to CNAME                                                 |


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.mailblast.io/using-mailblast/custom-tracking-urls.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.