Leaf Email, Reports shows, for each sent campaign, how many were sent, failed, skipped or are waiting, the delivery rate and the reasons for failures. With a licence you can export per-recipient results; the file contains email addresses, so treat it as personal data.
Open and click tracking
Tracking is off by default. Tick “Track opens and clicks in new campaigns” at the top of Reports. Leaf Email then adds a tiny image and routes links through your own site. It stores only the campaign, the contact and the time: no IP address and no browser details. Deleting a subscriber deletes their tracking events. Check that your privacy policy and local law allow tracking.
Treat opens as estimates: many mail apps pre-load images (counted as opens) and some block them (not counted). Clicks can include security scanners. Only campaigns sent after you switch tracking on are tracked. Welcome series emails are tracked too, and the Automations screen shows people who opened and clicked.