diff --git a/pkg/services/ngalert/sender/sender.go b/pkg/services/ngalert/sender/sender.go
index df807ad9401..96b1edb9fa9 100644
--- a/pkg/services/ngalert/sender/sender.go
+++ b/pkg/services/ngalert/sender/sender.go
@@ -180,6 +180,15 @@ func (s *ExternalAlertmanager) SendAlerts(alerts apimodels.PostableAlerts) {
 	for _, a := range alerts.PostableAlerts {
 		na := s.alertToNotifierAlert(a)
 		as = append(as, na)
+
+		s.logger.Debug("msg",
+			"Sending alert",
+			"alert",
+			a,
+			"starts_at",
+			a.StartsAt,
+			"ends_at",
+			a.EndsAt)
 	}
 
 	s.manager.Send(as...)