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), the domain that sends an email message or the links to which its content point matters.
Spam filters and recipient servers review links within email messages. They base the trustworthiness of the email message on the reputation of the domain of the message and its links. When you implement link labeling, email deliverability improves as you track clicks through your domain.
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Link branding, not whitelabel
You might encounter the term whitelabel. The term link branding replaces that term and eliminates any potential racial or cultural connotations associated with the earlier term.