# Link branding

*Marketing*. Change the domain for open and click tracking links to your domain.

As email authentication relies on the [domain name system (DNS)][dns], the domain that sends an email message or the links to which its content point matters.

[Spam filters][spam-filter] and recipient servers review links within email messages. They base the trustworthiness of the email message on the [reputation][ers] of the domain of the message and its links.

[spam-filter]: /docs/glossary/spam-filter

[dns]: /docs/glossary/dns

[ers]: /docs/glossary/email-reputation-score