diff --git a/CMakeLists.txt b/CMakeLists.txt
index a2d2258..164a06f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,10 +17,9 @@ include_directories(${PROJECT_SOURCE_DIR}/src)
 
 # Resources
 qt6_add_resources(WinoMailQtResources
-    PREFIX
-        /
     FILES
         resources/qml/main.qml
+        resources/qml/Shell.qml
 )
 
 # Source files
@@ -32,10 +31,18 @@ set(SRC_FILES
     src/core/models/folder.cpp
     src/services/synchronizer.cpp
     src/services/imap/imapsynchronizer.cpp
+    src/services/outlook/outlooksynchronizer.cpp
+    src/services/gmail/gmailsynchronizer.cpp
+    src/services/request.cpp
+    src/services/concreterequests.cpp
+    src/services/requestprocessor.cpp
+    src/services/changetype.cpp
+    src/services/changprocessor.cpp
     src/db/databasemanager.cpp
     src/db/dao/accountdao.cpp
     src/db/dao/folderdao.cpp
     src/db/dao/mailitemdao.cpp
+    src/db/dbchangeprocessor.cpp
 )
 
 # Executable
diff --git a/resources.qrc b/resources.qrc
index 3d86720..1d39c46 100644
--- a/resources.qrc
+++ b/resources.qrc
@@ -1,5 +1,6 @@
 <RCC>
     <qresource prefix="/">
         <file>resources/qml/main.qml</file>
+        <file>resources/qml/Shell.qml</file>
     </qresource>
 </RCC>
\ No newline at end of file
diff --git a/resources/qml/MailListPage.qml b/resources/qml/MailListPage.qml
new file mode 100644
index 0000000..9f2d976
--- /dev/null
+++ b/resources/qml/MailListPage.qml
@@ -0,0 +1,136 @@
+import QtQuick 2.15
+import QtQuick.Controls 2.15
+import QtQuick.Layouts 1.15
+
+Item {
+    id: mailListPage
+    anchors.fill: parent
+
+    // Layout: SplitView for resizable panes
+    SplitView {
+        anchors.fill: parent
+
+        // Left pane: Folder list
+        Rectangle {
+            width: 200
+            color: "#fafafa"
+            ListView {
+                id: folderListView
+                anchors.fill: parent
+                clip: true
+                model: FolderModel {}
+                delegate: Item {
+                    height: 40
+                    Layout.fillWidth: true
+                    Rectangle {
+                        anchors.fill: parent
+                        color: ListView.isCurrentItem ? "#e3f2fd" : "transparent"
+                        Text {
+                            text: folderName
+                            anchors.left: parent.left
+                            anchors.leftMargin: 16
+                            anchors.verticalCenter: parent.verticalCenter
+                            font.pointSize: 14
+                            color: ListView.isCurrentItem ? "#1976d2" : "#666"
+                        }
+                    }
+                    MouseArea {
+                        anchors.fill: parent
+                        onClicked: {
+                            folderListView.currentIndex = index
+                            // TODO: Load emails for selected folder
+                        }
+                    }
+                }
+            }
+        }
+
+        // Right pane: Email list and preview
+        Rectangle {
+            color: "#fafafa"
+            SplitView {
+                orientation: Qt.Vertical
+                anchors.fill: parent
+
+                // Email list (top)
+                Rectangle {
+                    Layout.minimumHeight: 200
+                    color: "#fafafa"
+                    ListView {
+                        id: emailListView
+                        anchors.fill: parent
+                        clip: true
+                        model: EmailModel {}
+                        delegate: Item {
+                            height: 60
+                            Layout.fillWidth: true
+                            Rectangle {
+                                anchors.fill: parent
+                                color: ListView.isCurrentItem ? "#e3f2fd" : "transparent"
+                                RowLayout {
+                                    anchors.fill: parent
+                                    anchors.margins: 8
+                                    // Sender avatar/initial
+                                    Rectangle {
+                                        width: 40
+                                        height: 40
+                                        color: "#cccccc"
+                                        Text {
+                                            text: senderInitial
+                                            anchors.centerIn: parent
+                                            font.pointSize: 16
+                                            color: "#666"
+                                        }
+                                    }
+                                    ColumnLayout {
+                                        Layout.fillWidth: true
+                                        spacing: 4
+                                        Text {
+                                            text: senderName
+                                            font.pointSize: 14
+                                            color: "#333"
+                                            elide: Text.ElideRight
+                                            Layout.fillWidth: true
+                                        }
+                                        Text {
+                                            text: subject
+                                            font.pointSize: 13
+                                            color: "#666"
+                                            elide: Text.ElideRight
+                                            Layout.fillWidth: true
+                                        }
+                                        Text {
+                                            text: time
+                                            font.pointSize: 12
+                                            color: "#999"
+                                        }
+                                    }
+                                }
+                            }
+                            MouseArea {
+                                anchors.fill: parent
+                                onClicked: {
+                                    emailListView.currentIndex = index
+                                    // TODO: Show email preview in the bottom pane
+                                }
+                            }
+                        }
+                    }
+                }
+
+                // Email preview (bottom)
+                Rectangle {
+                    Layout.minimumHeight: 200
+                    color: "#ffffff"
+                    Text {
+                        id: emailPreview
+                        text: "Select an email to preview"
+                        anchors.centerIn: parent
+                        font.pointSize: 14
+                        color: "#666"
+                    }
+                }
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/resources/qml/Shell.qml b/resources/qml/Shell.qml
new file mode 100644
index 0000000..24946d1
--- /dev/null
+++ b/resources/qml/Shell.qml
@@ -0,0 +1,174 @@
+import QtQuick 2.15
+import QtQuick.Window 2.15
+import QtQuick.Controls 2.15
+import QtQuick.Layouts 1.15
+
+ApplicationWindow {
+    id: shell
+    visible: true
+    width: 1024
+    height: 768
+    title: qsTr("Wino Mail Qt")
+
+    // Set the title from translator in Component.onCompleted
+    Component.onCompleted: {
+        title = translator.tr("appName")
+    }
+
+    // Drawer for navigation
+    Drawer {
+        id: drawer
+        width: 200
+        height: shell.height
+        Container {
+            anchors.fill: parent
+            Layout.alignment: Qt.AlignTop
+            ScrollView {
+                anchors.fill: parent
+                ColumnLayout {
+                    spacing: 0
+                    // App logo/name
+                    Rectangle {
+                        Layout.fillWidth: true
+                        height: 60
+                        color: "#1976D2"
+                        Text {
+                            text: qsTr("Wino Mail")
+                            color: "white"
+                            font.pointSize: 18
+                            anchors.centerIn: parent
+                        }
+                    }
+                    // Navigation items
+                    NavigationItem {
+                        text: qsTr("Mail")
+                        icon: "mail"
+                        isChecked: stackView.currentIndex === 0
+                        onClicked: {
+                            drawer.close()
+                            stackView.currentIndex = 0
+                        }
+                    }
+                    NavigationItem {
+                        text: qsTr("Calendar")
+                        icon: "calendar"
+                        isChecked: stackView.currentIndex === 1
+                        onClicked: {
+                            drawer.close()
+                            stackView.currentIndex = 1
+                        }
+                    }
+                    NavigationItem {
+                        text: qsTr("Contacts")
+                        icon: "contacts"
+                        isChecked: stackView.currentIndex === 2
+                        onClicked: {
+                            drawer.close()
+                            stackView.currentIndex = 2
+                        }
+                    }
+                    NavigationItem {
+                        text: qsTr("Settings")
+                        icon: "settings"
+                        isChecked: stackView.currentIndex === 3
+                        onClicked: {
+                            drawer.close()
+                            stackView.currentIndex = 3
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    // Main content area with StackView for pages
+    StackView {
+        id: stackView
+        anchors.fill: parent
+        initialItem: mailListPage
+    }
+
+    // Define pages
+    MailListPage {
+        id: mailListPage
+    }
+    // Placeholder for other pages
+    Rectangle {
+        color: "#f0f0f0"
+        Text {
+            text: qsTr("Calendar Page")
+            anchors.centerIn: parent
+        }
+    }
+    Rectangle {
+        color: "#f0f0f0"
+        Text {
+            text: qsTr("Contacts Page")
+            anchors.centerIn: parent
+        }
+    }
+    Rectangle {
+        color: "#f0f0f0"
+        Text {
+            text: qsTr("Settings Page")
+            anchors.centerIn: parent
+        }
+    }
+
+    // Hamburger button to open drawer
+    MenuButton {
+        icon: "menu"
+        anchors.left: parent.left
+        anchors.top: parent.top
+        anchors.margins: 10
+        onClicked: drawer.open()
+    }
+}
+
+// Helper components
+component NavigationItem: Button {
+    Layout.fillWidth: true
+    height: 48
+    padding: 0
+    contentItem: RowLayout {
+        spacing: 16
+        anchors.fill: parent
+        anchors.margins: 24
+        Icon {
+            source: icon
+            width: 24
+            height: 24
+            color: isChecked ? "#1976D2" : "#666"
+        }
+        Text {
+            text: text
+            font.pointSize: 14
+            verticalAlignment: Text.AlignVCenter
+            color: isChecked ? "#1976D2" : "#666"
+        }
+    }
+    background: Rectangle {
+        color: isChecked ? "#E3F2FD" : "transparent"
+        radius: 0
+    }
+}
+
+component MenuButton: IconButton {
+    iconSource: icon
+}
+
+// Placeholder for MailListPage - we'll replace this with a real component later
+component MailListPage: Item {
+    id: mailListPage
+    anchors.fill: parent
+    Rectangle {
+        anchors.fill: parent
+        color: "#fafafa"
+        Text {
+            text: qsTr("Mail List Placeholder")
+            anchors.centerIn: parent
+            font.pointSize: 16
+            color: "#666"
+        }
+    }
+}
\ No newline at end of file
diff --git a/resources/qml/main.qml b/resources/qml/main.qml
index 8f0654d..e765464 100644
--- a/resources/qml/main.qml
+++ b/resources/qml/main.qml
@@ -2,28 +2,6 @@ import QtQuick 2.15
 import QtQuick.Window 2.15
 import QtQuick.Controls 2.15
 
-Window {
-    width: 1024
-    height: 768
-    visible: true
-    title: qsTr("Wino Mail Qt")
-
-    // Use the translator to set the title
-    // Note: we can't directly call translator.tr here because it's a C++ object.
-    // We'll set the title in Component.onCompleted by accessing the context property.
-    Component.onCompleted: {
-        title = translator.tr("appName")
-    }
-
-    Rectangle {
-        anchors.fill: parent
-        color: "#f0f0f0"
-
-        Text {
-            text: qsTr("Welcome to Wino Mail Qt!")
-            anchors.centerIn: parent
-            font.pointSize: 24
-            color: "#333"
-        }
-    }
+// We'll load the Shell component from Shell.qml
+Shell {
 }
\ No newline at end of file
diff --git a/resources/qml/models/FolderModel.qml b/resources/qml/models/FolderModel.qml
new file mode 100644
index 0000000..06f3b0e
--- /dev/null
+++ b/resources/qml/models/FolderModel.qml
@@ -0,0 +1,24 @@
+import QtQuick 2.15
+
+ListModel {
+    ListElement {
+        folderName: "Inbox"
+        unreadCount: 5
+    }
+    ListElement {
+        folderName: "Sent"
+        unreadCount: 0
+    }
+    ListElement {
+        folderName: "Drafts"
+        unreadCount: 0
+    }
+    ListElement {
+        folderName: "Trash"
+        unreadCount: 0
+    }
+    ListElement {
+        folderName: "Spam"
+        unreadCount: 0
+    }
+}
\ No newline at end of file
diff --git a/src/core/events.h b/src/core/events.h
index f13cf5b..69a85ba 100644
--- a/src/core/events.h
+++ b/src/core/events.h
@@ -3,9 +3,9 @@
 #include <QString>
 #include <QDateTime>
 #include <QVector>
-#include "../models/account.h"
-#include "../models/folder.h"
-#include "../core/mailitem.h"
+#include "models/account.h"
+#include "models/folder.h"
+#include "mailitem.h"
 
 namespace WinoMail {
 namespace Events {
@@ -38,7 +38,7 @@ struct FolderAddedEvent : public BaseEvent {
 };
 
 struct FolderRemovedEvent : public BaseEvent {
-    String folderId;
+    QString folderId;
 };
 
 struct FolderUpdatedEvent : public BaseEvent {
@@ -63,12 +63,12 @@ struct AccountUpdatedEvent : public BaseEvent {
 // Sync events
 struct SyncStartedEvent : public BaseEvent {
     int accountId;
-    String folderId; // Optional, empty for full account sync
+    QString folderId; // Optional, empty for full account sync
 };
 
 struct SyncFinishedEvent : public BaseEvent {
     int accountId;
-    String folderId; // Optional, empty for full account sync
+    QString folderId; // Optional, empty for full account sync
     bool success;
     QString errorMessage; // If success is false
 };
diff --git a/src/core/translator.h b/src/core/translator.h
index 508a254..b120cc9 100644
--- a/src/core/translator.h
+++ b/src/core/translator.h
@@ -3,9 +3,11 @@
 #include <QString>
 #include <QMap>
 #include <QMutex>
+#include <QObject>
 
-class Translator
+class Translator : public QObject
 {
+    Q_OBJECT
 public:
     static Translator& instance();
     ~Translator() = default;
diff --git a/src/db/dao/accountdao.cpp b/src/db/dao/accountdao.cpp
index 7142f8a..6c15edb 100644
--- a/src/db/dao/accountdao.cpp
+++ b/src/db/dao/accountdao.cpp
@@ -1,5 +1,4 @@
 #include "accountdao.h"
-#include <optional>
 
 bool AccountDao::insert(const Account& account)
 {
@@ -69,7 +68,7 @@ bool AccountDao::remove(int id)
     return true;
 }
 
-std::optional<Account> AccountDao::findById(int id)
+Account* AccountDao::findById(int id)
 {
     QSqlDatabase& db = DatabaseManager::instance().database();
     QSqlQuery query(db);
@@ -78,21 +77,22 @@ std::optional<Account> AccountDao::findById(int id)
 
     if (!query.exec()) {
         qWarning() << "Failed to find account by id:" << query.lastError().text();
-        return std::nullopt;
+        return nullptr;
     }
 
     if (query.next()) {
-        Account acc;
-        acc.setId(query.value(0).toInt());
-        acc.setEmail(query.value(1).toString());
-        acc.setDisplayName(query.value(2).toString());
-        acc.setType(static_cast<AccountType>(query.value(3).toInt()));
-        acc.setAccessToken(query.value(4).toString());
-        acc.setRefreshToken(query.value(5).toString());
-        acc.setTokenExpires(query.value(6).toDateTime());
-        return acc;
+        Account* account = new Account();
+        account->setId(query.value("id").toLongLong());
+        account->setEmail(query.value("email").toString());
+        account->setDisplayName(query.value("displayName").toString());
+        account->setType(static_cast<AccountType>(query.value("type").toInt()));
+        account->setAccessToken(query.value("accessToken").toString());
+        account->setRefreshToken(query.value("refreshToken").toString());
+        account->setTokenExpires(query.value("tokenExpires").toDateTime());
+        return account;
     }
-    return std::nullopt;
+
+    return nullptr;
 }
 
 QVector<Account> AccountDao::findAll()
@@ -119,7 +119,7 @@ QVector<Account> AccountDao::findAll()
     return accounts;
 }
 
-std::optional<Account> AccountDao::findByEmail(const QString& email)
+Account* AccountDao::findByEmail(const QString& email)
 {
     QSqlDatabase& db = DatabaseManager::instance().database();
     QSqlQuery query(db);
@@ -128,19 +128,19 @@ std::optional<Account> AccountDao::findByEmail(const QString& email)
 
     if (!query.exec()) {
         qWarning() << "Failed to find account by email:" << query.lastError().text();
-        return std::nullopt;
+        return nullptr;
     }
 
     if (query.next()) {
-        Account acc;
-        acc.setId(query.value(0).toInt());
-        acc.setEmail(query.value(1).toString());
-        acc.setDisplayName(query.value(2).toString());
-        acc.setType(static_cast<AccountType>(query.value(3).toInt()));
-        acc.setAccessToken(query.value(4).toString());
-        acc.setRefreshToken(query.value(5).toString());
-        acc.setTokenExpires(query.value(6).toDateTime());
+        Account* acc = new Account();
+        acc->setId(query.value(0).toLongLong());
+        acc->setEmail(query.value(1).toString());
+        acc->setDisplayName(query.value(2).toString());
+        acc->setType(static_cast<AccountType>(query.value(3).toInt()));
+        acc->setAccessToken(query.value(4).toString());
+        acc->setRefreshToken(query.value(5).toString());
+        acc->setTokenExpires(query.value(6).toDateTime());
         return acc;
     }
-    return std::nullopt;
-}
\ No newline at end of file
+    return nullptr;
+}
diff --git a/src/db/dao/folderdao.cpp b/src/db/dao/folderdao.cpp
index 733f267..37108cb 100644
--- a/src/db/dao/folderdao.cpp
+++ b/src/db/dao/folderdao.cpp
@@ -1,4 +1,7 @@
+#include <QSqlQuery>
 #include "folderdao.h"
+#include <QSqlError>
+#include <QSqlError>
 #include <optional>
 
 bool FolderDao::insert(const Folder& folder)
diff --git a/src/db/dao/mailitemdao.cpp b/src/db/dao/mailitemdao.cpp
index a526f08..9760790 100644
--- a/src/db/dao/mailitemdao.cpp
+++ b/src/db/dao/mailitemdao.cpp
@@ -1,3 +1,5 @@
+#include <QSqlQuery>
+#include <QSqlError>
 #include "mailitemdao.h"
 #include <optional>
 
diff --git a/src/db/dbchangeprocessor.cpp b/src/db/dbchangeprocessor.cpp
new file mode 100644
index 0000000..8058e73
--- /dev/null
+++ b/src/db/dbchangeprocessor.cpp
@@ -0,0 +1,214 @@
+#include "dbchangeprocessor.h"
+#include <QDebug>
+#include <QDateTime>
+
+DbChangeProcessor::DbChangeProcessor(QObject* parent)
+    : QObject(parent),
+      m_db(DatabaseManager::instance()),
+      m_mailItemDao(MailItemDao::instance()),
+      m_folderDao(FolderDao::instance()),
+      m_accountDao(AccountDao::instance()),
+      m_batchTimer(new QTimer(this))
+{
+    // Configurar el timer para procesar batch cada 5 segundos
+    m_batchTimer->setInterval(5000); // 5 segundos
+    connect(m_batchTimer, &QTimer::timeout, this, &DbChangeProcessor::processBatch);
+    m_batchTimer->start();
+
+    // Suscribirse a todos los eventos relevantes
+    SUBSCRIBE(WinoMail::Events::MailItemAddedEvent, 
+              [this](const WinoMail::Events::MailItemAddedEvent& event) {
+                  handleMailItemAdded(event);
+              });
+              
+    SUBSCRIBE(WinoMail::Events::MailItemRemovedEvent, 
+              [this](const WinoMail::Events::MailItemRemovedEvent& event) {
+                  handleMailItemRemoved(event);
+              });
+              
+    SUBSCRIBE(WinoMail::Events::MailItemUpdatedEvent, 
+              [this](const WinoMail::Events::MailItemUpdatedEvent& event) {
+                  handleMailItemUpdated(event);
+              });
+              
+    SUBSCRIBE(WinoMail::Events::FolderAddedEvent, 
+              [this](const WinoMail::Events::FolderAddedEvent& event) {
+                  handleFolderAdded(event);
+              });
+              
+    SUBSCRIBE(WinoMail::Events::FolderRemovedEvent, 
+              [this](const WinoMail::Events::FolderRemovedEvent& event) {
+                  handleFolderRemoved(event);
+              });
+              
+    SUBSCRIBE(WinoMail::Events::FolderUpdatedEvent, 
+              [this](const WinoMail::Events::FolderUpdatedEvent& event) {
+                  handleFolderUpdated(event);
+              });
+              
+    SUBSCRIBE(WinoMail::Events::AccountAddedEvent, 
+              [this](const WinoMail::Events::AccountAddedEvent& event) {
+                  handleAccountAdded(event);
+              });
+              
+    SUBSCRIBE(WinoMail::Events::AccountRemovedEvent, 
+              [this](const WinoMail::Events::AccountRemovedEvent& event) {
+                  handleAccountRemoved(event);
+              });
+              
+    SUBSCRIBE(WinoMail::Events::AccountUpdatedEvent, 
+              [this](const WinoMail::Events::AccountUpdatedEvent& event) {
+                  handleAccountUpdated(event);
+              });
+}
+
+void DbChangeProcessor::handleMailItemAdded(const WinoMail::Events::MailItemAddedEvent& event)
+{
+    qDebug() << "DbChangeProcessor: Queuing MailItemAddedEvent for UID:" << event.item.uid;
+    m_mailItemAddedQueue.append(event);
+}
+
+void DbChangeProcessor::handleMailItemRemoved(const WinoMail::Events::MailItemRemovedEvent& event)
+{
+    qDebug() << "DbChangeProcessor: Queuing MailItemRemovedEvent for UID:" << event.itemUid;
+    m_mailItemRemovedQueue.append(event);
+}
+
+void DbChangeProcessor::handleMailItemUpdated(const WinoMail::Events::MailItemUpdatedEvent& event)
+{
+    qDebug() << "DbChangeProcessor: Queuing MailItemUpdatedEvent for UID:" << event.item.uid;
+    m_mailItemUpdatedQueue.append(event);
+}
+
+void DbChangeProcessor::handleFolderAdded(const WinoMail::Events::FolderAddedEvent& event)
+{
+    qDebug() << "DbChangeProcessor: Queuing FolderAddedEvent for folder:" << event.folder.name;
+    m_folderAddedQueue.append(event);
+}
+
+void DbChangeProcessor::handleFolderRemoved(const WinoMail::Events::FolderRemovedEvent& event)
+{
+    qDebug() << "DbChangeProcessor: Queuing FolderRemovedEvent for folder ID:" << event.folderId;
+    m_folderRemovedQueue.append(event);
+}
+
+void DbChangeProcessor::handleFolderUpdated(const WinoMail::Events::FolderUpdatedEvent& event)
+{
+    qDebug() << "DbChangeProcessor: Queuing FolderUpdatedEvent for folder ID:" << event.folder.id();
+    m_folderUpdatedQueue.append(event);
+}
+
+void DbChangeProcessor::handleAccountAdded(const WinoMail::Events::AccountAddedEvent& event)
+{
+    qDebug() << "DbChangeProcessor: Queuing AccountAddedEvent for account:" << event.account.email();
+    m_accountAddedQueue.append(event);
+}
+
+void DbChangeProcessor::handleAccountRemoved(const WinoMail::Events::AccountRemovedEvent& event)
+{
+    qDebug() << "DbChangeProcessor: Queuing AccountRemovedEvent for account ID:" << event.accountId;
+    m_accountRemovedQueue.append(event);
+}
+
+void DbChangeProcessor::handleAccountUpdated(const WinoMail::Events::AccountUpdatedEvent& event)
+{
+    qDebug() << "DbChangeProcessor: Queuing AccountUpdatedEvent for account ID:" << event.account.id();
+    m_accountUpdatedQueue.append(event);
+}
+
+void DbChangeProcessor::processBatch()
+{
+    qDebug() << "DbChangeProcessor: Starting batch processing at" << QDateTime::currentDateTime().toString();
+    
+    // Procesar eventos de MailItem añadidos
+    if (!m_mailItemAddedQueue.isEmpty()) {
+        qDebug() << "DbChangeProcessor: Processing" << m_mailItemAddedQueue.size() << "MailItemAdded events";
+        for (const auto& event : m_mailItemAddedQueue) {
+            m_mailItemDao.insert(event.item);
+        }
+        m_mailItemAddedQueue.clear();
+    }
+    
+    // Procesar eventos de MailItem eliminados
+    if (!m_mailItemRemovedQueue.isEmpty()) {
+        qDebug() << "DbChangeProcessor: Processing" << m_mailItemRemovedQueue.size() << "MailItemRemoved events";
+        for (const auto& event : m_mailItemRemovedQueue) {
+            m_mailItemDao.removeByUid(event.itemUid, event.folderId);
+        }
+        m_mailItemRemovedQueue.clear();
+    }
+    
+    // Procesar eventos de MailItem actualizados
+    if (!m_mailItemUpdatedQueue.isEmpty()) {
+        qDebug() << "DbChangeProcessor: Processing" << m_mailItemUpdatedQueue.size() << "MailItemUpdated events";
+        for (const auto& event : m_mailItemUpdatedQueue) {
+            m_mailItemDao.update(event.item, event.changedFields);
+        }
+        m_mailItemUpdatedQueue.clear();
+    }
+    
+    // Procesar eventos de carpetas añadidas
+    if (!m_folderAddedQueue.isEmpty()) {
+        qDebug() << "DbChangeProcessor: Processing" << m_folderAddedQueue.size() << "FolderAdded events";
+        for (const auto& event : m_folderAddedQueue) {
+            m_folderDao.insert(event.folder);
+        }
+        m_folderAddedQueue.clear();
+    }
+    
+    // Procesar eventos de carpetas eliminadas
+    if (!m_folderRemovedQueue.isEmpty()) {
+        qDebug() << "DbChangeProcessor: Processing" << m_folderRemovedQueue.size() << "FolderRemoved events";
+        for (const auto& event : m_folderRemovedQueue) {
+            m_folderDao.remove(event.folderId.toInt());
+        }
+        m_folderRemovedQueue.clear();
+    }
+    
+    // Procesar eventos de carpetas actualizadas
+    if (!m_folderUpdatedQueue.isEmpty()) {
+        qDebug() << "DbChangeProcessor: Processing" << m_folderUpdatedQueue.size() << "FolderUpdated events";
+        for (const auto& event : m_folderUpdatedQueue) {
+            m_folderDao.update(event.folder, event.changedFields);
+        }
+        m_folderUpdatedQueue.clear();
+    }
+    
+    // Procesar eventos de cuentas añadidas
+    if (!m_accountAddedQueue.isEmpty()) {
+        qDebug() << "DbChangeProcessor: Processing" << m_accountAddedQueue.size() << "AccountAdded events";
+        for (const auto& event : m_accountAddedQueue) {
+            m_accountDao.insert(event.account);
+        }
+        m_accountAddedQueue.clear();
+    }
+    
+    // Procesar eventos de cuentas eliminadas
+    if (!m_accountRemovedQueue.isEmpty()) {
+        qDebug() << "DbChangeProcessor: Processing" << m_accountRemovedQueue.size() << "AccountRemoved events";
+        for (const auto& event : m_accountRemovedQueue) {
+            m_accountDao.remove(event.accountId);
+        }
+        m_accountRemovedQueue.clear();
+    }
+    
+    // Procesar eventos de cuentas actualizadas
+    if (!m_accountUpdatedQueue.isEmpty()) {
+        qDebug() << "DbChangeProcessor: Processing" << m_accountUpdatedQueue.size() << "AccountUpdated events";
+        for (const auto& event : m_accountUpdatedQueue) {
+            m_accountDao.update(event.account, event.changedFields);
+        }
+        m_accountUpdatedQueue.clear();
+    }
+    
+    qDebug() << "DbChangeProcessor: Batch processing completed at" << QDateTime::currentDateTime().toString();
+}
+
+DbChangeProcessor::~DbChangeProcessor()
+{
+    if (m_batchTimer->isActive()) {
+        m_batchTimer->stop();
+    }
+    // Procesar cualquier evento restante antes de destruir
+    processBatch();
+}
\ No newline at end of file
diff --git a/src/db/dbchangeprocessor.h b/src/db/dbchangeprocessor.h
new file mode 100644
index 0000000..41620f3
--- /dev/null
+++ b/src/db/dbchangeprocessor.h
@@ -0,0 +1,51 @@
+#ifndef DBCHANGEPROCESSOR_H
+#define DBCHANGEPROCESSOR_H
+
+#include <QObject>
+#include <QTimer>
+#include <QVector>
+#include "core/eventbus.h"
+#include "../core/events.h"
+#include "../db/databasemanager.h"
+#include "../db/dao/accountdao.h"
+#include "../db/dao/folderdao.h"
+#include "../db/dao/mailitemdao.h"
+
+class DbChangeProcessor : public QObject
+{
+    Q_OBJECT
+public:
+    explicit DbChangeProcessor(QObject* parent = nullptr);
+    ~DbChangeProcessor() override = default;
+
+private slots:
+    void handleMailItemAdded(const WinoMail::Events::MailItemAddedEvent& event);
+    void handleMailItemRemoved(const WinoMail::Events::MailItemRemovedEvent& event);
+    void handleMailItemUpdated(const WinoMail::Events::MailItemUpdatedEvent& event);
+    void handleFolderAdded(const WinoMail::Events::FolderAddedEvent& event);
+    void handleFolderRemoved(const WinoMail::Events::FolderRemovedEvent& event);
+    void handleFolderUpdated(const WinoMail::Events::FolderUpdatedEvent& event);
+    void handleAccountAdded(const WinoMail::Events::AccountAddedEvent& event);
+    void handleAccountRemoved(const WinoMail::Events::AccountRemovedEvent& event);
+    void handleAccountUpdated(const WinoMail::Events::AccountUpdatedEvent& event);
+    void processBatch();
+
+private:
+    DatabaseManager& m_db;
+    MailItemDao& m_mailItemDao;
+    FolderDao& m_folderDao;
+    AccountDao& m_accountDao;
+
+    QTimer* m_batchTimer;
+    QVector<WinoMail::Events::MailItemAddedEvent> m_mailItemAddedQueue;
+    QVector<WinoMail::Events::MailItemRemovedEvent> m_mailItemRemovedQueue;
+    QVector<WinoMail::Events::MailItemUpdatedEvent> m_mailItemUpdatedQueue;
+    QVector<WinoMail::Events::FolderAddedEvent> m_folderAddedQueue;
+    QVector<WinoMail::Events::FolderRemovedEvent> m_folderRemovedQueue;
+    QVector<WinoMail::Events::FolderUpdatedEvent> m_folderUpdatedQueue;
+    QVector<WinoMail::Events::AccountAddedEvent> m_accountAddedQueue;
+    QVector<WinoMail::Events::AccountRemovedEvent> m_accountRemovedQueue;
+    QVector<WinoMail::Events::AccountUpdatedEvent> m_accountUpdatedQueue;
+};
+
+#endif // DBCHANGEPROCESSOR_H
\ No newline at end of file
diff --git a/src/main.cpp b/src/main.cpp
index 4f665a1..3c5e8ff 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2,6 +2,7 @@
 #include <QQmlApplicationEngine>
 #include <QQmlContext>
 #include "core/translator.h"
+#include "db/dbchangeprocessor.h"
 
 int main(int argc, char *argv[])
 {
@@ -13,8 +14,11 @@ int main(int argc, char *argv[])
         qWarning() << "Failed to load translation";
     }
 
+    // Initialize the DbChangeProcessor to start processing events in batches
+    DbChangeProcessor dbChangeProcessor(&app);
+
     QQmlApplicationEngine engine;
-    engine.rootContext()->setContextProperty("translator", &translator);
+    engine.rootContext()->setContextProperty("translator", static_cast<QObject*>(&translator));
 
     const QUrl url(QStringLiteral("qrc:/main.qml"));
     QObject::connect(&engine, &QQmlApplicationEngine::objectCreated,
diff --git a/src/services/gmail/gmailsynchronizer.cpp b/src/services/gmail/gmailsynchronizer.cpp
index 066243d..78d8a00 100644
--- a/src/services/gmail/gmailsynchronizer.cpp
+++ b/src/services/gmail/gmailsynchronizer.cpp
@@ -7,6 +7,7 @@
 #include <QJsonObject>
 #include <QJsonArray>
 #include <QDebug>
+#include <QUrlQuery>
 #include <QDateTime>
 #include <QTimer>
 
@@ -25,11 +26,6 @@ GmailSynchronizer::GmailSynchronizer(QObject* parent)
     m_historyTimer->setInterval(2 * 60 * 1000); // 2 minutos
 }
 
-GmailSynchronizer::~GmailSynchronizer()
-{
-    m_historyTimer->stop();
-}
-
 bool GmailSynchronizer::initialize(const Account& account)
 {
     // Guardar información de la cuenta
@@ -60,10 +56,10 @@ bool GmailSynchronizer::syncFolder(const Folder& folder)
     }
     
     qDebug() << "Starting Gmail sync for folder (label):" << folder.name();
-    emit folderSyncStarted(folder.id());
+    emit folderSyncStarted(QString::number(folder.id()));
     
     // Obtener elementos de correo desde Gmail API
-    QVector<MailItem> items = fetchMailItems(folder.id());
+    QVector<MailItem> items = fetchMailItems(QString::number(folder.id()));
     
     // En una implementación real, aquí compararíamos con la base de datos local
     // y emitiríamos las señales apropiadas para elementos nuevos/actualizados/eliminados
@@ -75,7 +71,7 @@ bool GmailSynchronizer::syncFolder(const Folder& folder)
         }
     }
     
-    emit folderSyncFinished(folder.id(), true);
+    emit folderSyncFinished(QString::number(folder.id()), true);
     return true;
 }
 
@@ -113,7 +109,7 @@ QVector<MailItem> GmailSynchronizer::fetchMailItems(const QString& folderId,
     
     // Construir la URL para Gmail API
     // Nota: En Gmail, las carpetas se identifican por su nombre de label (ej: INBOX, DRAFTS, etc.)
-    QString endpoint = String.format("/me/mailFolders/%1/messages", folderId);
+    QString endpoint = QString("/me/mailFolders/%1/messages").arg(folderId);
     QString url = buildGmailUrl(endpoint);
     
     // Parámetros de consulta
@@ -257,7 +253,7 @@ void GmailSynchronizer::onHistoryTimer()
     // de todas las etiquetas (esto sería ineficiente en producción)
     QVector<Folder> folders = getFolders();
     for (const Folder& folder : folders) {
-        syncFolder(folder.id());
+        syncFolder(Folder(folder.id(), 0, QString()));
     }
 }
 
@@ -270,7 +266,7 @@ QString GmailSynchronizer::buildGmailUrl(const QString& endpoint) const
 
 QNetworkRequest GmailSynchronizer::createAuthRequest(const QString& url) const
 {
-    QNetworkRequest request(QUrl(url));
+    QNetworkRequest request{QUrl(url)};
     request.setRawHeader("Authorization", 
                         QString("Bearer %1").arg(m_accessToken).toUtf8());
     request.setHeader(QNetworkRequest::ContentTypeHeader, 
diff --git a/src/services/imap/imapsynchronizer.cpp b/src/services/imap/imapsynchronizer.cpp
index ee81603..51c3d54 100644
--- a/src/services/imap/imapsynchronizer.cpp
+++ b/src/services/imap/imapsynchronizer.cpp
@@ -1,5 +1,6 @@
 #include "imapsynchronizer.h"
 #include <QDebug>
+#include <cstdlib>
 
 ImapSynchronizer::ImapSynchronizer(QObject* parent)
     : Synchronizer(parent)
@@ -11,6 +12,15 @@ bool ImapSynchronizer::initialize(const Account& account)
     Q_UNUSED(account);
     qDebug() << "IMAP Synchronizer initialize (stub)";
     m_connected = true; // pretend success
+    
+    // Publish AccountConnectedEvent
+    WinoMail::Events::AccountConnectedEvent event;
+    event.eventId = generateEventId();
+    event.timestamp = QDateTime::currentDateTimeUtc();
+    event.accountId = account.id();
+    event.provider = "imap";
+    PUBLISH(event);
+    
     return true;
 }
 
@@ -18,9 +28,36 @@ bool ImapSynchronizer::syncFolder(const Folder& folder)
 {
     Q_UNUSED(folder);
     qDebug() << "IMAP Synchronizer syncFolder (stub)";
-    emit folderSyncStarted(folder.name());
+    
+    // Publish SyncStartedEvent
+    WinoMail::Events::SyncStartedEvent event;
+    event.eventId = generateEventId();
+    event.timestamp = QDateTime::currentDateTimeUtc();
+    event.accountId = m_account.id();
+    event.folderId = QString::number(folder.id()); // Assuming folder.id() returns int
+    PUBLISH(event);
+    
     // In reality, we would connect to IMAP, list messages, etc.
-    emit folderSyncFinished(folder.name(), true);
+    // For now, simulate some mail items being added
+    QVector<MailItem> items = fetchMailItems(QString::number(folder.id()));
+    for (const MailItem& item : items) {
+        WinoMail::Events::MailItemAddedEvent mailEvent;
+        mailEvent.eventId = generateEventId();
+        mailEvent.timestamp = QDateTime::currentDateTimeUtc();
+        mailEvent.item = item;
+        PUBLISH(mailEvent);
+    }
+    
+    // Publish SyncFinishedEvent
+    WinoMail::Events::SyncFinishedEvent finishEvent;
+    finishEvent.eventId = generateEventId();
+    finishEvent.timestamp = QDateTime::currentDateTimeUtc();
+    finishEvent.accountId = m_account.id();
+    finishEvent.folderId = QString::number(folder.id());
+    finishEvent.success = true;
+    finishEvent.errorMessage = "";
+    PUBLISH(finishEvent);
+    
     return true;
 }
 
@@ -41,7 +78,7 @@ QVector<MailItem> ImapSynchronizer::fetchMailItems(const QString& folderId,
     qDebug() << "IMAP Synchronizer fetchMailItems (stub)";
     // Return a dummy mail item for testing
     QVector<MailItem> items;
-    items.append(MailItem(1, "Test Subject", "sender@example.com", "me@example.com",
+    items.append(MailItem(1, 1, "Test Subject", "sender@example.com", "me@example.com",
                           QDateTime::currentDateTime(), false, false));
     return items;
 }
@@ -51,6 +88,13 @@ bool ImapSynchronizer::appendMailItem(const QString& folderId, const MailItem& i
     Q_UNUSED(folderId);
     Q_UNUSED(item);
     qDebug() << "IMAP Synchronizer appendMailItem (stub)";
+    // In a real implementation, this would send the mail via IMAP APPEND
+    // For now, we'll simulate success and publish an event
+    WinoMail::Events::MailItemAddedEvent event;
+    event.eventId = generateEventId();
+    event.timestamp = QDateTime::currentDateTimeUtc();
+    event.item = item;
+    PUBLISH(event);
     return true;
 }
 
@@ -63,6 +107,18 @@ bool ImapSynchronizer::updateMailItemFlags(const QString& folderId,
     Q_UNUSED(read);
     Q_UNUSED(flagged);
     qDebug() << "IMAP Synchronizer updateMailItemFlags (stub)";
+    // In a real implementation, this would update flags via IMAP STORE
+    // For now, we'll simulate success and publish an update event
+    // We need to fetch the item first to know what changed
+    MailItem item; // This would be fetched from storage
+    item.setId(itemUid.toLongLong()); // Assuming there's a setter
+    
+    WinoMail::Events::MailItemUpdatedEvent event;
+    event.eventId = generateEventId();
+    event.timestamp = QDateTime::currentDateTimeUtc();
+    event.item = item;
+    event.changedFields = QStringList() << "read" << "flagged"; // Simplified
+    PUBLISH(event);
     return true;
 }
 
@@ -72,5 +128,21 @@ bool ImapSynchronizer::deleteMailItem(const QString& folderId,
     Q_UNUSED(folderId);
     Q_UNUSED(itemUid);
     qDebug() << "IMAP Synchronizer deleteMailItem (stub)";
+    // In a real implementation, this would delete the mail via IMAP STORE +FLAGS or EXPUNGE
+    // For now, we'll simulate success and publish a removal event
+    WinoMail::Events::MailItemRemovedEvent event;
+    event.eventId = generateEventId();
+    event.timestamp = QDateTime::currentDateTimeUtc();
+    event.itemUid = itemUid;
+    event.folderId = folderId.toInt(); // Assuming folderId is numeric
+    PUBLISH(event);
     return true;
+}
+
+// Helper para generar IDs únicos de eventos
+QString ImapSynchronizer::generateEventId() const
+{
+    // Simple implementation using timestamp and random component
+    return QString::number(QDateTime::currentMSecsSinceEpoch()) + "_" + 
+           QString::number(std::rand());
 }
\ No newline at end of file
diff --git a/src/services/imap/imapsynchronizer.h b/src/services/imap/imapsynchronizer.h
index 3325f53..79c23e9 100644
--- a/src/services/imap/imapsynchronizer.h
+++ b/src/services/imap/imapsynchronizer.h
@@ -2,6 +2,10 @@
 
 #include "../synchronizer.h"
 #include <QObject>
+#include "../../core/eventbus.h"
+#include "../../core/models/account.h"
+#include "../../core/models/folder.h"
+#include "../../core/mailitem.h"
 
 class ImapSynchronizer : public Synchronizer
 {
@@ -31,4 +35,7 @@ private:
     QString m_username;
     QString m_password;
     bool m_useSsl{true};
+    
+    // Helper para generar IDs únicos de eventos
+    QString generateEventId() const;
 };
\ No newline at end of file
diff --git a/src/services/outlook/outlooksynchronizer.cpp b/src/services/outlook/outlooksynchronizer.cpp
index 5f8e05e..b684165 100644
--- a/src/services/outlook/outlooksynchronizer.cpp
+++ b/src/services/outlook/outlooksynchronizer.cpp
@@ -7,6 +7,7 @@
 #include <QJsonObject>
 #include <QJsonArray>
 #include <QDebug>
+#include <QUrlQuery>
 #include <QDateTime>
 #include <QTimer>
 
@@ -25,11 +26,6 @@ OutlookSynchronizer::OutlookSynchronizer(QObject* parent)
     m_deltaTimer->setInterval(5 * 60 * 1000); // 5 minutos
 }
 
-OutlookSynchronizer::~OutlookSynchronizer()
-{
-    m_deltaTimer->stop();
-}
-
 bool OutlookSynchronizer::initialize(const Account& account)
 {
     // Guardar información de la cuenta
@@ -60,10 +56,10 @@ bool OutlookSynchronizer::syncFolder(const Folder& folder)
     }
     
     qDebug() << "Starting Outlook sync for folder:" << folder.name();
-    emit folderSyncStarted(folder.id());
+    emit folderSyncStarted(QString::number(folder.id()));
     
     // Obtener elementos de correo desde Microsoft Graph
-    QVector<MailItem> items = fetchMailItems(folder.id());
+    QVector<MailItem> items = fetchMailItems(QString::number(folder.id()));
     
     // En una implementación real, aquí compararíamos con la base de datos local
     // y emitiríamos las señales apropiadas para elementos nuevos/actualizados/eliminados
@@ -75,7 +71,7 @@ bool OutlookSynchronizer::syncFolder(const Folder& folder)
         }
     }
     
-    emit folderSyncFinished(folder.id(), true);
+    emit folderSyncFinished(QString::number(folder.id()), true);
     return true;
 }
 
@@ -264,7 +260,7 @@ QString OutlookSynchronizer::buildGraphUrl(const QString& endpoint) const
 
 QNetworkRequest OutlookSynchronizer::createAuthRequest(const QString& url) const
 {
-    QNetworkRequest request(QUrl(url));
+    QNetworkRequest request{QUrl(url)};
     request.setRawHeader("Authorization", 
                         QString("Bearer %1").arg(m_accessToken).toUtf8());
     request.setHeader(QNetworkRequest::ContentTypeHeader, 
diff --git a/src/ui/models/FolderListModel.cpp b/src/ui/models/FolderListModel.cpp
new file mode 100644
index 0000000..a71d57c
--- /dev/null
+++ b/src/ui/models/FolderListModel.cpp
@@ -0,0 +1,46 @@
+#include "FolderListModel.h"
+#include <QDebug>
+
+FolderListModel::FolderListModel(QObject *parent)
+    : QAbstractListModel(parent),
+      m_folderDao(FolderDao::instance())
+{
+    refresh();
+}
+
+int FolderListModel::rowCount(const QModelIndex &parent) const
+{
+    if (parent.isValid())
+        return 0;
+    return m_folderNames.size();
+}
+
+QVariant FolderListModel::data(const QModelIndex &index, int role) const
+{
+    if (!index.isValid() || index.row() >= m_folderNames.size())
+        return QVariant();
+
+    if (role == FolderNameRole)
+        return m_folderNames.at(index.row());
+    else if (role == UnreadCountRole)
+        return m_unreadCounts.at(index.row());
+    return QVariant();
+}
+
+QHash<int, QByteArray> FolderListModel::roleNames() const
+{
+    QHash<int, QByteArray> roles;
+    roles[FolderNameRole] = "folderName";
+    roles[UnreadCountRole] = "unreadCount";
+    return roles;
+}
+
+void FolderListModel::refresh()
+{
+    beginResetModel();
+    // For now, we'll just use hardcoded folders until we implement the DAO properly
+    m_folderNames = {"Inbox", "Sent", "Drafts", "Trash", "Spam"};
+    m_unreadCounts = {5, 0, 0, 0, 0};
+    endResetModel();
+    qDebug() << "FolderListModel refreshed with" << m_folderNames.size() << "folders";
+}
\ No newline at end of file
diff --git a/src/ui/models/FolderListModel.h b/src/ui/models/FolderListModel.h
new file mode 100644
index 0000000..22a713b
--- /dev/null
+++ b/src/ui/models/FolderListModel.h
@@ -0,0 +1,34 @@
+#ifndef FOLDERLISTMODEL_H
+#define FOLDERLISTMODEL_H
+
+#include <QAbstractListModel>
+#include <QHash>
+#include <QByteArray>
+#include "../db/dao/folderdao.h"
+
+class FolderListModel : public QAbstractListModel
+{
+    Q_OBJECT
+public:
+    explicit FolderListModel(QObject *parent = nullptr);
+    ~FolderListModel() override = default;
+
+    enum FolderRoles {
+        FolderNameRole = Qt::UserRole + 1,
+        UnreadCountRole
+    };
+
+    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
+    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
+    QHash<int, QByteArray> roleNames() const override;
+
+    // Optional: method to refresh the model from the database
+    void refresh();
+
+private:
+    QVector<QString> m_folderNames;
+    QVector<int> m_unreadCounts;
+    FolderDao& m_folderDao;
+};
+
+#endif // FOLDERLISTMODEL_H
\ No newline at end of file