Open tracking
A 1x1 transparent pixel is embedded in each outgoing email. When the recipient’s email client loads the image, harp records an open event.trackingId is unique per email send.
Some email clients block image loading by default. Open tracking is an approximation, not an exact count.
Click tracking
Links in outgoing emails are rewritten to pass through harp’s click tracker. When clicked, the recipient is redirected to the original URL.302 redirect to the original URL. The click event is recorded before redirecting.
Privacy considerations
- Tracking is per-email, not per-recipient — no cross-session tracking
- No cookies are set by tracking endpoints
- Open and click data is visible only within your workspace