Use qCDebug here

src/kmmainwidget.cpp

@@ -4455,7 +4455,7 @@ void KMMainWidget::slotMessageSelected(const Akonadi::Item &item)
 
 void KMMainWidget::itemsReceived(const Akonadi::Item::List &list)
 {
-    qDebug() << " list count  " << list.count();
+    qCDebug(KMAIL_LOG) << " list count  " << list.count();
     // Q_ASSERT(list.size() == 1);
     delete mShowBusySplashTimer;
     mShowBusySplashTimer = nullptr;