diff --git a/src/librssguard/gui/dialogs/formmessagefiltersmanager.cpp b/src/librssguard/gui/dialogs/formmessagefiltersmanager.cpp
index 0fa2fa08d..7e5c19121 100644
--- a/src/librssguard/gui/dialogs/formmessagefiltersmanager.cpp
+++ b/src/librssguard/gui/dialogs/formmessagefiltersmanager.cpp
@@ -15,6 +15,7 @@
 #include "miscellaneous/iconfactory.h"
 #include "network-web/webfactory.h"
 #include "services/abstract/accountcheckmodel.h"
+#include "services/abstract/feed.h"
 
 FormMessageFiltersManager::FormMessageFiltersManager(FeedReader* reader, const QList<ServiceRoot*>& accounts, QWidget* parent)
   : QDialog(parent), m_feedsModel(new AccountCheckModel(this)), m_rootItem(new RootItem()),
@@ -45,15 +46,16 @@ FormMessageFiltersManager::FormMessageFiltersManager(FeedReader* reader, const Q
   connect(m_ui.m_txtScript, &QPlainTextEdit::textChanged, this, &FormMessageFiltersManager::saveSelectedFilter);
   connect(m_ui.m_btnTest, &QPushButton::clicked, this, &FormMessageFiltersManager::testFilter);
   connect(m_ui.m_btnBeautify, &QPushButton::clicked, this, &FormMessageFiltersManager::beautifyScript);
-  connect(m_ui.m_cmbAccounts, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this, [this]() {
-    // Load feeds/categories of the account and check marks.
-    loadSelectedAccount();
-    loadFilterFeedAssignments();
-  });
+  connect(m_ui.m_cmbAccounts, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged),
+          this,
+          &FormMessageFiltersManager::onAccountChanged);
   connect(m_ui.m_btnCheckAll, &QPushButton::clicked, m_feedsModel, &AccountCheckModel::checkAllItems);
   connect(m_ui.m_btnUncheckAll, &QPushButton::clicked, m_feedsModel, &AccountCheckModel::uncheckAllItems);
+  connect(m_feedsModel, &AccountCheckModel::checkStateChanged, this,
+          &FormMessageFiltersManager::onFeedChecked);
 
   initializeTestingMessage();
+  loadFilters();
   loadFilter();
   loadAccounts();
 }
@@ -77,6 +79,14 @@ ServiceRoot* FormMessageFiltersManager::selectedAccount() const {
   return dat.isNull() ? nullptr : dat.value<ServiceRoot*>();
 }
 
+void FormMessageFiltersManager::loadFilters() {
+  for (auto* fltr : m_reader->messageFilters()) {
+    auto* it = new QListWidgetItem(fltr->name(), m_ui.m_listFilters);
+
+    it->setData(Qt::ItemDataRole::UserRole, QVariant::fromValue<MessageFilter*>(fltr));
+  }
+}
+
 void FormMessageFiltersManager::addNewFilter() {
   auto* fltr = m_reader->addMessageFilter(
     tr("New message filter"),
@@ -111,6 +121,7 @@ void FormMessageFiltersManager::loadFilter() {
   auto* acc = selectedAccount();
 
   showFilter(filter);
+  loadFilterFeedAssignments(filter, acc);
 }
 
 void FormMessageFiltersManager::testFilter() {
@@ -165,12 +176,60 @@ void FormMessageFiltersManager::testFilter() {
   m_ui.m_tcMessage->setCurrentIndex(1);
 }
 
-void FormMessageFiltersManager::loadSelectedAccount() {
-  m_feedsModel->setRootItem(selectedAccount(), false, true);
+void FormMessageFiltersManager::loadAccount(ServiceRoot* account) {
+  m_feedsModel->setRootItem(account, false, true);
   m_ui.m_treeFeeds->expandAll();
 }
 
-void FormMessageFiltersManager::loadFilterFeedAssignments() {}
+void FormMessageFiltersManager::loadFilterFeedAssignments(MessageFilter* filter, ServiceRoot* account) {
+  if (account == nullptr || filter == nullptr) {
+    return;
+  }
+
+  m_loadingFilter = true;
+
+  for (auto* feed : account->getSubTreeFeeds()) {
+    if (feed->messageFilters().contains(filter)) {
+      m_feedsModel->setItemChecked(feed, Qt::CheckState::Checked);
+    }
+  }
+
+  m_loadingFilter = false;
+}
+
+void FormMessageFiltersManager::onAccountChanged() {
+  // Load feeds/categories of the account and check marks.
+  auto* filter = selectedFilter();
+  auto* acc = selectedAccount();
+
+  loadAccount(acc);
+  loadFilterFeedAssignments(filter, acc);
+}
+
+void FormMessageFiltersManager::onFeedChecked(RootItem* item, Qt::CheckState state) {
+  if (m_loadingFilter) {
+    return;
+  }
+
+  auto* feed = qobject_cast<Feed*>(item);
+
+  if (feed == nullptr) {
+    return;
+  }
+
+  switch (state) {
+    case Qt::CheckState::Checked:
+      m_reader->assignMessageFilterToFeed(feed, selectedFilter());
+      break;
+
+    case Qt::CheckState::Unchecked:
+      m_reader->removeMessageFilterToFeedAssignment(feed, selectedFilter());
+      break;
+
+    case Qt::CheckState::PartiallyChecked:
+      break;
+  }
+}
 
 void FormMessageFiltersManager::showFilter(MessageFilter* filter) {
   m_loadingFilter = true;
diff --git a/src/librssguard/gui/dialogs/formmessagefiltersmanager.h b/src/librssguard/gui/dialogs/formmessagefiltersmanager.h
index 1f1e16d58..ee32d2392 100644
--- a/src/librssguard/gui/dialogs/formmessagefiltersmanager.h
+++ b/src/librssguard/gui/dialogs/formmessagefiltersmanager.h
@@ -27,13 +27,17 @@ class FormMessageFiltersManager : public QDialog {
     void addNewFilter();
     void saveSelectedFilter();
     void loadFilter();
+    void loadFilters();
     void testFilter();
 
     // Load feeds/categories tree.
-    void loadSelectedAccount();
+    void loadAccount(ServiceRoot* account);
 
     // Load checkmarks according to already active assignments.
-    void loadFilterFeedAssignments();
+    void loadFilterFeedAssignments(MessageFilter* filter, ServiceRoot* account);
+
+    void onAccountChanged();
+    void onFeedChecked(RootItem* item, Qt::CheckState state);
 
     // Display filter title/contents.
     void showFilter(MessageFilter* filter);
diff --git a/src/librssguard/miscellaneous/feedreader.cpp b/src/librssguard/miscellaneous/feedreader.cpp
index aff7fcd70..c2ad1227a 100644
--- a/src/librssguard/miscellaneous/feedreader.cpp
+++ b/src/librssguard/miscellaneous/feedreader.cpp
@@ -167,6 +167,18 @@ void FeedReader::updateMessageFilter(MessageFilter* filter) {
   // TODO: Filter's name or script is changed, save to database.
 }
 
+void FeedReader::assignMessageFilterToFeed(Feed* feed, MessageFilter* filter) {
+  feed->appendMessageFilter(filter);
+
+  // TODO: Add assignment to database.
+}
+
+void FeedReader::removeMessageFilterToFeedAssignment(Feed* feed, MessageFilter* filter) {
+  feed->removeMessageFilter(filter);
+
+  // TODO: Remove assignment from database.
+}
+
 void FeedReader::updateAllFeeds() {
   updateFeeds(m_feedsModel->rootItem()->getSubTreeFeeds());
 }
diff --git a/src/librssguard/miscellaneous/feedreader.h b/src/librssguard/miscellaneous/feedreader.h
index 4bc375a90..dd8080c8f 100644
--- a/src/librssguard/miscellaneous/feedreader.h
+++ b/src/librssguard/miscellaneous/feedreader.h
@@ -56,6 +56,8 @@ class RSSGUARD_DLLSPEC FeedReader : public QObject {
     QList<MessageFilter*> messageFilters() const;
     MessageFilter* addMessageFilter(const QString& title, const QString& script);
     void updateMessageFilter(MessageFilter* filter);
+    void assignMessageFilterToFeed(Feed* feed, MessageFilter* filter);
+    void removeMessageFilterToFeedAssignment(Feed* feed, MessageFilter* filter);
 
   public slots:
     void updateAllFeeds();
diff --git a/src/librssguard/services/abstract/accountcheckmodel.cpp b/src/librssguard/services/abstract/accountcheckmodel.cpp
index b686a44c2..f0852aafe 100644
--- a/src/librssguard/services/abstract/accountcheckmodel.cpp
+++ b/src/librssguard/services/abstract/accountcheckmodel.cpp
@@ -229,18 +229,28 @@ bool AccountCheckModel::setData(const QModelIndex& index, const QVariant& value,
       item = item->parent();
 
       // Check children of this new parent item.
-      Qt::CheckState parent_state = Qt::Unchecked;
+      bool all_checked = true;
+      bool all_unchecked = true;
 
       for (RootItem* child_of_parent : item->childItems()) {
-        if (m_checkStates.contains(child_of_parent) && m_checkStates[child_of_parent] == Qt::Checked) {
-          // We found out, that some child of this item is checked,
-          // therefore this item must be checked too.
-          parent_state = Qt::Checked;
-          break;
+        if (m_checkStates.contains(child_of_parent)) {
+          all_checked &= m_checkStates[child_of_parent] == Qt::CheckState::Checked;
+          all_unchecked &= m_checkStates[child_of_parent] == Qt::CheckState::Unchecked;
+        }
+        else {
+          all_checked = false;
         }
       }
 
-      setData(parent_index, parent_state, Qt::CheckStateRole);
+      if (all_checked) {
+        setData(parent_index, Qt::CheckState::Checked, Qt::CheckStateRole);
+      }
+      else if (all_unchecked) {
+        setData(parent_index, Qt::CheckState::Unchecked, Qt::CheckStateRole);
+      }
+      else {
+        setData(parent_index, Qt::CheckState::PartiallyChecked, Qt::CheckStateRole);
+      }
     }
 
     m_recursiveChange = false;
diff --git a/src/librssguard/services/abstract/accountcheckmodel.h b/src/librssguard/services/abstract/accountcheckmodel.h
index f11e027bd..13bee3533 100644
--- a/src/librssguard/services/abstract/accountcheckmodel.h
+++ b/src/librssguard/services/abstract/accountcheckmodel.h
@@ -44,7 +44,7 @@ class AccountCheckModel : public QAbstractItemModel {
     void uncheckAllItems();
 
   signals:
-    void checkStateChanged(RootItem* item, Qt::CheckState);
+    void checkStateChanged(RootItem* item, Qt::CheckState state);
 
   protected:
     RootItem* m_rootItem;
diff --git a/src/librssguard/services/abstract/feed.cpp b/src/librssguard/services/abstract/feed.cpp
index 1de515805..1c43ab6d9 100755
--- a/src/librssguard/services/abstract/feed.cpp
+++ b/src/librssguard/services/abstract/feed.cpp
@@ -52,7 +52,7 @@ Feed::Feed(const Feed& other) : RootItem(other) {
   setAutoUpdateType(other.autoUpdateType());
   setAutoUpdateInitialInterval(other.autoUpdateInitialInterval());
   setAutoUpdateRemainingInterval(other.autoUpdateRemainingInterval());
-  setFilters(other.messageFilters());
+  setMessageFilters(other.messageFilters());
 }
 
 Feed::~Feed() = default;
@@ -288,10 +288,20 @@ QList<QPointer<MessageFilter>> Feed::messageFilters() const {
   return m_messageFilters;
 }
 
-void Feed::setFilters(const QList<QPointer<MessageFilter>>& filters) {
+void Feed::setMessageFilters(const QList<QPointer<MessageFilter>>& filters) {
   m_messageFilters = filters;
 }
 
+void Feed::removeMessageFilter(MessageFilter* filter) {
+  // TODO: check this.
+
+  int idx = m_messageFilters.indexOf(filter);
+
+  if (idx >= 0) {
+    m_messageFilters.removeAll(filter);
+  }
+}
+
 QString Feed::additionalTooltip() const {
   return tr("Auto-update status: %1\n"
             "Active message filters: %2\n"
diff --git a/src/librssguard/services/abstract/feed.h b/src/librssguard/services/abstract/feed.h
index 1b9edcffe..dffef60c7 100644
--- a/src/librssguard/services/abstract/feed.h
+++ b/src/librssguard/services/abstract/feed.h
@@ -71,7 +71,8 @@ class Feed : public RootItem {
 
     void appendMessageFilter(MessageFilter* filter);
     QList<QPointer<MessageFilter>> messageFilters() const;
-    void setFilters(const QList<QPointer<MessageFilter>>& messageFilters);
+    void setMessageFilters(const QList<QPointer<MessageFilter>>& messageFilters);
+    void removeMessageFilter(MessageFilter* filter);
 
     bool markAsReadUnread(ReadStatus status);
     bool cleanMessages(bool clean_read_only);