Your email-sending provider reports delivery events back to Sprwt as they happen — processed, dropped, delivered, deferred, bounced/blocked, opened, clicked, marked as spam, or unsubscribed. Status-type events update the sent message's status; engagement events (open, click, spam, unsubscribe) are logged as separate stats with browser and link detail. Opens and clicks on an automation-flow email are also recorded as flow events, so a later conditional step in the same automation (for example, "if opened, do X") can react to them.