GTM Toolkit

Custom tracking domain

A custom tracking domain is a sender's own subdomain used to record link clicks and opens, replacing a sequencer's shared default so link reputation traces back to the sender's own infrastructure, not a domain used by thousands of other senders.

Related terms
Updated July 25, 2026

Ready to engineer your GTM motion?

Tell us how your motion runs today. We'll show you what we'd engineer.

Contact us