diff --git a/kcms/componentchooser/componentchooseremail.cpp b/kcms/componentchooser/componentchooseremail.cpp
--- a/kcms/componentchooser/componentchooseremail.cpp
+++ b/kcms/componentchooser/componentchooseremail.cpp
@@ -22,11 +22,15 @@
 #include <KConfigGroup>
 #include <KSharedConfig>
 #include <KService>
+#include <KBuildSycocaProgressDialog>
+
 #include <QDBusConnection>
 #include <QDBusMessage>
 #include <QUrl>
 #include <QFile>
 #include <QCheckBox>
+#include <QDBusConnection>
+#include <QDBusMessage>
 
 // for chmod:
 #include <sys/types.h>
@@ -138,14 +142,23 @@
             defaultApp.writeXdgListEntry("x-scheme-handler/mailto", QStringList(m_emailClientService->storageId()));
         }
         profile->sync();
+
+        KBuildSycocaProgressDialog::rebuildKSycoca(this);
     }
 
+    QDBusMessage message  = QDBusMessage::createMethodCall(QStringLiteral("org.kde.klauncher5"),
+                                                           QStringLiteral("/KLauncher"),
+                                                           QStringLiteral("org.kde.KLauncher"),
+                                                           QStringLiteral("reparseConfiguration"));
+    QDBusConnection::sessionBus().send(message);
+
     // insure proper permissions -- contains sensitive data
     QString cfgName(QStandardPaths::locate(QStandardPaths::ConfigLocation, QStringLiteral("emails")));
     if (!cfgName.isEmpty())
         ::chmod(QFile::encodeName(cfgName), 0600);
     QDBusMessage message = QDBusMessage::createSignal(QStringLiteral("/Component"), QStringLiteral("org.kde.Kcontrol"), QStringLiteral("KDE_emailSettingsChanged") );
     QDBusConnection::sessionBus().send(message);
+
     emit changed(false);
 }