Open & click tracking

Tracking turns recipient behavior into email.opened and email.clicked events:

• Open tracking injects an invisible tracking pixel into the HTML body.
• Click tracking rewrites links in the HTML body to pass through SendSignal’s tracking redirect (on the tracking hostname you CNAMEd during domain setup) before continuing to the destination.

Opens and clicks feed the stats API (opened and clicked count unique emails), fire webhooks, appear on the email’s event timeline, and can trigger automations. Click events include the destination link in their data.

Toggling per domain

Both default to on and are configured per sending domain:

curl -X PATCH https://api.sendsignal.dev/domains/{id} \
  -H "Authorization: Bearer ss_..." -H "Content-Type: application/json" \
  -d '{"open_tracking": false, "click_tracking": true}'

Turn them off where measurement matters less than pristine content, e.g. security or compliance mail where rewritten links are undesirable.