Open and click tracking
You can now see who opened your emails and which links they clicked. Turn on tracking from the Emails page in the dashboard (opens and clicks are separate switches), and every new send records its engagement: counts in the email log, a per-event timeline on each email, and email.opened / email.clicked webhook events for your own systems. Any single send can override the project setting with the new tracking field on the send API.
Tracking links live on our tracking host by default, but you can put them on your own domain instead. On the Domains page, enable branded tracking links, add the one CNAME record we show you, and we handle the certificate automatically. Until the record is live your emails simply keep using the shared host, so nothing ever breaks.
Tracking is off by default and never applies retroactively: only emails sent after you switch it on are measured.