diff --git a/lib/kolab_sync_storage.php b/lib/kolab_sync_storage.php
index eb2c379..1dea755 100644
--- a/lib/kolab_sync_storage.php
+++ b/lib/kolab_sync_storage.php
@@ -110,7 +110,7 @@ class kolab_sync_storage
         $this->storage->set_options([
             // @TODO: there can be Roundcube plugins defining additional headers,
             // we maybe would need to add them here
-            'fetch_headers' => 'X-KOLAB-TYPE X-KOLAB-MIME-VERSION',
+            'fetch_headers' => 'X-KOLAB-TYPE X-KOLAB-MIME-VERSION MESSAGE-ID',
             'skip_deleted'  => true,
             'threading'     => false,
         ]);