diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2a0c38e7b..ee58ba287 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -143,7 +143,10 @@ include_directories(${kmail_SOURCE_DIR} ${kmail_BINARY_DIR})
 configure_file(kmail-version.h.cmake ${CMAKE_CURRENT_BINARY_DIR}/kmail-version.h @ONLY)
 
 add_definitions(-DQT_DISABLE_DEPRECATED_BEFORE=0x060000)
-
+if (${KF5Config_VERSION} STRGREATER "5.56.0")
+        add_definitions(-DQT_NO_FOREACH)
+        MESSAGE(STATUS "compile without foreach")
+endif()
 add_subdirectory(src)
 add_subdirectory(agents)
 add_subdirectory(ktnef)
diff --git a/agents/archivemailagent/archivemailmanager.cpp b/agents/archivemailagent/archivemailmanager.cpp
index 772d70c79..2be623713 100644
--- a/agents/archivemailagent/archivemailmanager.cpp
+++ b/agents/archivemailagent/archivemailmanager.cpp
@@ -105,7 +105,8 @@ void ArchiveMailManager::removeCollectionId(Akonadi::Collection::Id id)
         group.deleteGroup();
         mConfig->sync();
         mConfig->reparseConfiguration();
-        foreach (ArchiveMailInfo *info, mListArchiveInfo) { //Don't port to for(...:...)
+        const auto lst = mListArchiveInfo;
+        for (ArchiveMailInfo *info : lst) {
             if (info->saveCollectionId() == id) {
                 mListArchiveInfo.removeAll(info);
             }
diff --git a/src/editor/kmcomposerwin.cpp b/src/editor/kmcomposerwin.cpp
index 21af0845b..80a99ed46 100644
--- a/src/editor/kmcomposerwin.cpp
+++ b/src/editor/kmcomposerwin.cpp
@@ -1378,7 +1378,8 @@ void KMComposerWin::initializePluginActions()
         QHash<QString, QList<QAction *> >::const_iterator i = hashActions.constBegin();
 
         while (i != hashActions.constEnd()) {
-            Q_FOREACH (KXMLGUIClient *client, guiFactory()->clients()) {
+            const auto lst = guiFactory()->clients();
+            for (KXMLGUIClient *client : lst) {
                 client->unplugActionList(i.key());
                 client->plugActionList(i.key(), i.value());
             }
@@ -2340,7 +2341,8 @@ void KMComposerWin::setEncryption(bool encrypt, bool setByUser)
 
     if (setByUser) {
         // User has toggled encryption, go over all recipients
-        Q_FOREACH (auto line, mComposerBase->recipientsEditor()->lines()) {
+        const auto lst = mComposerBase->recipientsEditor()->lines();
+        for (auto line : lst) {
             if (encrypt) {
                 // Encryption was enabled, update encryption status of all recipients
                 slotRecipientAdded(qobject_cast<MessageComposer::RecipientLineNG *>(line));
@@ -3420,7 +3422,8 @@ void KMComposerWin::slotRecipientEditorFocusChanged()
     // (unless user enabled it manually), because we want to encrypt by default,
     // but not by force
     bool encrypt = false;
-    Q_FOREACH (auto line_, mComposerBase->recipientsEditor()->lines()) {
+    const auto lst = mComposerBase->recipientsEditor()->lines();
+    for (auto line_ : lst) {
         auto line = qobject_cast<MessageComposer::RecipientLineNG *>(line_);
 
         // There's still a lookup job running, so wait, slotKeyForMailBoxResult()
diff --git a/src/kmkernel.cpp b/src/kmkernel.cpp
index 08196f1dd..f0c2b2c78 100644
--- a/src/kmkernel.cpp
+++ b/src/kmkernel.cpp
@@ -536,7 +536,8 @@ void KMKernel::openReader(bool onlyCheck, bool startInTray)
 {
     KMainWindow *ktmw = nullptr;
 
-    foreach (KMainWindow *window, KMainWindow::memberList()) {
+    const auto lst = KMainWindow::memberList();
+    for (KMainWindow *window : lst) {
         if (::qobject_cast<KMMainWin *>(window)) {
             ktmw = window;
             break;
@@ -685,7 +686,8 @@ bool KMKernel::showMail(qint64 serialNumber)
     KMMainWidget *mainWidget = nullptr;
 
     // First look for a KMainWindow.
-    foreach (KMainWindow *window, KMainWindow::memberList()) {
+    const auto lst = KMainWindow::memberList();
+    for (KMainWindow *window : lst) {
         // Then look for a KMMainWidget.
         QList<KMMainWidget *> l = window->findChildren<KMMainWidget *>();
         if (!l.isEmpty() && l.first()) {
@@ -1078,7 +1080,8 @@ void KMKernel::setFirstInstance(bool value)
 
 void KMKernel::closeAllKMailWindows()
 {
-    foreach (KMainWindow *window, KMainWindow::memberList()) {
+    const auto lst = KMainWindow::memberList();
+    for (KMainWindow *window : lst) {
         if (::qobject_cast<KMMainWin *>(window)
             || ::qobject_cast<KMail::SecondaryWindow *>(window)) {
             // close and delete the window
@@ -1139,7 +1142,8 @@ void KMKernel::dumpDeadLetters()
     }
 
     // make all composer windows autosave their contents
-    foreach (KMainWindow *window, KMainWindow::memberList()) {
+    const auto lst = KMainWindow::memberList();
+    for (KMainWindow *window : lst) {
         if (KMail::Composer *win = ::qobject_cast<KMail::Composer *>(window)) {
             win->autoSaveMessage(true);
 
@@ -1274,7 +1278,8 @@ JobScheduler *KMKernel::jobScheduler() const
 KMainWindow *KMKernel::mainWin()
 {
     // First look for a KMMainWin.
-    foreach (KMainWindow *window, KMainWindow::memberList()) {
+    const auto lst = KMainWindow::memberList();
+    for (KMainWindow *window : lst) {
         if (::qobject_cast<KMMainWin *>(window)) {
             return window;
         }