diff --git a/config/packages/messenger.yaml b/config/packages/messenger.yaml
index e1aa710..3c1eeab 100644
--- a/config/packages/messenger.yaml
+++ b/config/packages/messenger.yaml
@@ -1,6 +1,28 @@
 framework:
     messenger:
+        failure_transport: failed
+
         transports:
             sync: 'sync://'
 
-        routing: {}
+            async:
+                dsn: '%env(MESSENGER_TRANSPORT_DSN)%'
+                options:
+                    queue_name: default
+                retry_strategy:
+                    max_retries: 3
+                    delay: 1000
+                    multiplier: 2
+                    max_delay: 0
+
+            failed: 'doctrine://default?queue_name=failed&auto_setup=0'
+
+        routing:
+            'App\Message\MailSyncRequested': async
+
+when@test:
+    framework:
+        messenger:
+            transports:
+                async: 'in-memory://'
+                failed: 'in-memory://'
diff --git a/migrations/Version20260519220000.php b/migrations/Version20260519220000.php
new file mode 100644
index 0000000..a8a7feb
--- /dev/null
+++ b/migrations/Version20260519220000.php
@@ -0,0 +1,56 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Cree la table messenger_messages pour le transport async Symfony Messenger.
+ */
+final class Version20260519220000 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Cree la table messenger_messages pour le transport async Doctrine de Symfony Messenger.';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $this->addSql(<<<'SQL'
+            CREATE TABLE IF NOT EXISTS messenger_messages (
+                id BIGSERIAL PRIMARY KEY,
+                body TEXT NOT NULL,
+                headers TEXT NOT NULL,
+                queue_name VARCHAR(190) NOT NULL,
+                created_at TIMESTAMP(0) WITHOUT TIME ZONE NOT NULL,
+                available_at TIMESTAMP(0) WITHOUT TIME ZONE NOT NULL,
+                delivered_at TIMESTAMP(0) WITHOUT TIME ZONE DEFAULT NULL
+            )
+            SQL);
+
+        $this->addSql('CREATE INDEX IF NOT EXISTS IDX_75EA56E0FB7336F0 ON messenger_messages (queue_name)');
+        $this->addSql('CREATE INDEX IF NOT EXISTS IDX_75EA56E0E3BD61CE ON messenger_messages (available_at)');
+        $this->addSql('CREATE INDEX IF NOT EXISTS IDX_75EA56E016BA31DB ON messenger_messages (delivered_at)');
+
+        $this->addSql(<<<'SQL'
+            CREATE OR REPLACE FUNCTION notify_messenger_messages() RETURNS TRIGGER AS $$
+            BEGIN
+                PERFORM pg_notify('messenger_messages', NEW.queue_name::text);
+                RETURN NEW;
+            END;
+            $$ LANGUAGE plpgsql;
+            SQL);
+
+        $this->addSql('DROP TRIGGER IF EXISTS notify_trigger ON messenger_messages;');
+        $this->addSql('CREATE TRIGGER notify_trigger AFTER INSERT OR UPDATE ON messenger_messages FOR EACH ROW EXECUTE PROCEDURE notify_messenger_messages();');
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql('DROP TABLE IF EXISTS messenger_messages');
+        $this->addSql('DROP FUNCTION IF EXISTS notify_messenger_messages()');
+    }
+}
diff --git a/src/Message/MailSyncRequested.php b/src/Message/MailSyncRequested.php
new file mode 100644
index 0000000..01ecb52
--- /dev/null
+++ b/src/Message/MailSyncRequested.php
@@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Message;
+
+final readonly class MailSyncRequested
+{
+    public function __construct(
+        public ?string $folderPath = null,
+    ) {}
+}
diff --git a/src/MessageHandler/MailSyncRequestedHandler.php b/src/MessageHandler/MailSyncRequestedHandler.php
new file mode 100644
index 0000000..d76e32b
--- /dev/null
+++ b/src/MessageHandler/MailSyncRequestedHandler.php
@@ -0,0 +1,54 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\MessageHandler;
+
+use App\Message\MailSyncRequested;
+use App\Repository\MailFolderRepository;
+use App\Service\MailSyncService;
+use Psr\Log\LoggerInterface;
+use Symfony\Component\Messenger\Attribute\AsMessageHandler;
+use Throwable;
+
+#[AsMessageHandler]
+final readonly class MailSyncRequestedHandler
+{
+    public function __construct(
+        private MailSyncService $mailSyncService,
+        private MailFolderRepository $folderRepository,
+        private LoggerInterface $logger,
+    ) {}
+
+    public function __invoke(MailSyncRequested $message): void
+    {
+        try {
+            if (null !== $message->folderPath) {
+                $folder = $this->folderRepository->findByPath($message->folderPath);
+                if (null !== $folder) {
+                    $report = $this->mailSyncService->syncFolder($folder);
+                    $this->logger->info(sprintf(
+                        'MailSyncRequested handled for folder "%s": %d created, %d updated, %d deleted',
+                        $message->folderPath,
+                        $report->createdCount,
+                        $report->updatedCount,
+                        $report->deletedCount,
+                    ));
+                } else {
+                    $this->logger->warning(sprintf('MailSyncRequested: folder "%s" not found in DB', $message->folderPath));
+                }
+            } else {
+                $report = $this->mailSyncService->syncAll();
+                $this->logger->info(sprintf(
+                    'MailSyncRequested handled (all folders): %d created, %d updated, %d deleted, %d folders scanned',
+                    $report->createdCount,
+                    $report->updatedCount,
+                    $report->deletedCount,
+                    $report->foldersScanned,
+                ));
+            }
+        } catch (Throwable $e) {
+            $this->logger->error('MailSyncRequestedHandler failed: '.$e->getMessage());
+        }
+    }
+}