diff --git a/Elwig/Windows/MailWindow.xaml.cs b/Elwig/Windows/MailWindow.xaml.cs
index 6a368dd..89c0dd6 100644
--- a/Elwig/Windows/MailWindow.xaml.cs
+++ b/Elwig/Windows/MailWindow.xaml.cs
@@ -690,7 +690,7 @@ namespace Elwig.Windows {
                 PrintButton.IsEnabled = PrintDocument != null && !hasPreviewDocs;
                 EmailButton.IsEnabled = EmailDocuments != null && !hasPreviewDocs && App.Config.Smtp != null;
             } catch (Exception exc) {
-                MessageBox.Show(exc.ToString(), "Fehler", MessageBoxButton.OK, MessageBoxImage.Error);
+                MessageBox.Show(exc.Message, "Fehler", MessageBoxButton.OK, MessageBoxImage.Error);
             } finally {
                 UnlockInputs();
                 GenerateButton.IsEnabled = true;
@@ -742,6 +742,9 @@ namespace Elwig.Windows {
                 Member = m,
                 Docs = docs.SelectMany<SelectedDoc, GeneratedDoc>(doc => {
                     try {
+                        App.MainDispatcher.Invoke(() => {
+                            ProgressBar.Value = offset + 100.0 * i / 2 / totalNum;
+                        });
                         if (doc.Type == DocType.Custom) {
                             return [new GeneratedDoc((string)doc.Details!)];
                         } else if (doc.Type == DocType.MemberDataSheet) {