Deliverability
Custom tracking domain
Keep tracking links aligned with a domain you control.
Keep tracking links aligned with a domain you control.

How to use it
In Settings, add a tracking hostname, create the exact CNAME returned by Terlido, then verify or recheck it.
Important behavior
Do not hardcode a target from this guide; use the value shown in Terlido. Open and click tracking stays off until verification succeeds.