diff --git a/Elwig/Windows/MailWindow.xaml b/Elwig/Windows/MailWindow.xaml
index 882dd42..e7b8405 100644
--- a/Elwig/Windows/MailWindow.xaml
+++ b/Elwig/Windows/MailWindow.xaml
@@ -86,14 +86,16 @@
                         <Label x:Name="DocumentFooterLabel" Content="Fußtext:" Margin="10,40,0,10"/>
                         <TextBox x:Name="DeliveryConfirmationFooterInput" Grid.Column="1"
                                  Margin="0,40,10,10" Height="Auto" VerticalAlignment="Stretch" HorizontalAlignment="Stretch"
-                                 AcceptsReturn="True" VerticalScrollBarVisibility="Visible" TextWrapping="Wrap"/>
+                                 AcceptsReturn="True" VerticalScrollBarVisibility="Visible" TextWrapping="Wrap"
+                                 TextChanged="DocumentInput_TextChanged"/>
                         <TextBox x:Name="CreditNoteFooterInput" Grid.Column="1"
                                  Margin="0,10,10,10" Height="Auto" VerticalAlignment="Stretch" HorizontalAlignment="Stretch"
-                                 AcceptsReturn="True" VerticalScrollBarVisibility="Visible" TextWrapping="Wrap"/>
+                                 AcceptsReturn="True" VerticalScrollBarVisibility="Visible" TextWrapping="Wrap"
+                                 TextChanged="DocumentInput_TextChanged"/>
                     </Grid>
                 </GroupBox>
 
-                <TextBox x:Name="PostalLocation" Grid.Column="1"
+                <TextBox x:Name="PostalLocation" Grid.Column="1" TextChanged="PostalLocation_TextChanged"
                          Margin="10,30,10,10" Width="120" HorizontalAlignment="Left"/>
                 <Label Content=", am" Margin="130,30,10,10" FontSize="14" Grid.Column="1"/>
                 <TextBox x:Name="PostalDate" Grid.Column="1" Text="01.01.2020"
@@ -195,41 +197,42 @@
                     <Grid>
                         <GroupBox Header="Zusenden an..." Margin="10,10,10,10" Height="150" Width="220" VerticalAlignment="Top" HorizontalAlignment="Left">
                             <StackPanel>
-                                <RadioButton x:Name="PostalAllInput" Margin="10,10,10,2.5">
+                                <RadioButton x:Name="PostalAllInput" Margin="10,10,10,2.5" Click="PostalInput_Changed">
                                     <TextBlock>
-                                        ... alle (<Run Text="{Binding Path=PostalAllCount, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type local:MailWindow}}}"/>)
+                                        ...alle (<Run Text="{Binding Path=PostalAllCount, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type local:MailWindow}}}"/>)
                                     </TextBlock>
                                 </RadioButton>
-                                <RadioButton x:Name="PostalWishInput" Margin="10,2.5,10,2.5" IsChecked="True">
+                                <RadioButton x:Name="PostalWishInput" Margin="10,2.5,10,2.5" Click="PostalInput_Changed" IsChecked="True">
                                     <TextBlock>
                                         ...Mitglieder, die Zusendung<LineBreak/>
                                         per Post wünschen (<Run Text="{Binding Path=PostalWishCount, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type local:MailWindow}}}"/>)
                                     </TextBlock>
                                 </RadioButton>
-                                <RadioButton x:Name="PostalNoEmailInput" Margin="10,2.5,10,2.5">
+                                <RadioButton x:Name="PostalNoEmailInput" Margin="10,2.5,10,2.5" Click="PostalInput_Changed">
                                     <TextBlock>
                                         ...Mitglieder, die keine<LineBreak/>
                                         E-Mail erhalten würden (<Run Text="{Binding Path=PostalNoEmailCount, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type local:MailWindow}}}"/>)
                                     </TextBlock>
                                 </RadioButton>
-                                <RadioButton x:Name="PostalNobodyInput" Margin="10,2.5,10,10" Content="...niemanden (0)"/>
+                                <RadioButton x:Name="PostalNobodyInput" Margin="10,2.5,10,10" Content="...niemanden (0)"  Click="PostalInput_Changed"/>
                             </StackPanel>
                         </GroupBox>
 
                         <GroupBox Header="Sortieren nach" Margin="10,180,10,10" Width="180" Height="80" VerticalAlignment="Top" HorizontalAlignment="Left">
                             <StackPanel Margin="5,5,0,5">
-                                <RadioButton GroupName="Order" x:Name="OrderMgNrInput" Content="Mitgliedsnummer" IsChecked="True"/>
-                                <RadioButton GroupName="Order" x:Name="OrderNameInput" Content="Name"/>
-                                <RadioButton GroupName="Order" x:Name="OrderPlzInput" Content="PLZ, Ort, Name"/>
+                                <RadioButton GroupName="Order" x:Name="OrderMgNrInput" Content="Mitgliedsnummer" Click="OrderInput_Changed" IsChecked="True"/>
+                                <RadioButton GroupName="Order" x:Name="OrderNameInput" Content="Name" Click="OrderInput_Changed"/>
+                                <RadioButton GroupName="Order" x:Name="OrderPlzInput" Content="PLZ, Ort, Name" Click="OrderInput_Changed"/>
                             </StackPanel>
                         </GroupBox>
 
                         <CheckBox x:Name="DoublePagedInput" Margin="20,270,10,10" Content="Doppelseitig drucken"
-                                  VerticalAlignment="Top" HorizontalAlignment="Left"/>
+                                  VerticalAlignment="Top" HorizontalAlignment="Left"
+                                  Checked="DoublePagedInput_Changed" Unchecked="DoublePagedInput_Changed"/>
 
-                        <TextBox x:Name="PostalSender1" IsEnabled="False"
+                        <TextBox x:Name="PostalSender1" TextChanged="PostalSender_TextChanged" IsEnabled="False"
                                  Margin="10,300,10,10"/>
-                        <TextBox x:Name="PostalSender2"
+                        <TextBox x:Name="PostalSender2" TextChanged="PostalSender_TextChanged"
                                  Margin="10,330,10,10"/>
                     </Grid>
                 </GroupBox>
diff --git a/Elwig/Windows/MailWindow.xaml.cs b/Elwig/Windows/MailWindow.xaml.cs
index dc8fbce..473f0dd 100644
--- a/Elwig/Windows/MailWindow.xaml.cs
+++ b/Elwig/Windows/MailWindow.xaml.cs
@@ -200,6 +200,48 @@ namespace Elwig.Windows {
             await UpdateRecipients(ctx);
         }
 
+        private void ResetDocuments() {
+            DisposeDocs();
+            if (IsLoaded) {
+                PreviewButton.IsEnabled = false;
+                PrintButton.IsEnabled = false;
+                EmailButton.IsEnabled = false;
+                ProgressBar.Value = 0;
+            }
+        }
+
+        private void LockInputs() {
+            DocumentAddButton.IsEnabled = false;
+            DocumentRemoveButton.IsEnabled = false;
+            SelectDocumentButton.IsEnabled = false;
+            foreach (var tb in ControlUtils.FindAllChildren<TextBox>(this, []))
+                tb.IsReadOnly = true;
+            foreach (var cb in ControlUtils.FindAllChildren<ComboBox>(this, []))
+                cb.IsEnabled = false;
+            foreach (var cb in ControlUtils.FindAllChildren<CheckBox>(this, []))
+                cb.IsEnabled = false;
+            foreach (var lb in ControlUtils.FindAllChildren<ListBox>(this, []))
+                lb.IsEnabled = false;
+            foreach (var rb in ControlUtils.FindAllChildren<RadioButton>(this, []))
+                rb.IsEnabled = false;
+        }
+
+        private void UnlockInputs() {
+            DocumentAddButton.IsEnabled = true;
+            DocumentRemoveButton.IsEnabled = true;
+            SelectDocumentButton.IsEnabled = true;
+            foreach (var tb in ControlUtils.FindAllChildren<TextBox>(this, []))
+                tb.IsReadOnly = false;
+            foreach (var cb in ControlUtils.FindAllChildren<ComboBox>(this, []))
+                cb.IsEnabled = true;
+            foreach (var cb in ControlUtils.FindAllChildren<CheckBox>(this, []))
+                cb.IsEnabled = true;
+            foreach (var lb in ControlUtils.FindAllChildren<ListBox>(this, []))
+                lb.IsEnabled = true;
+            foreach (var rb in ControlUtils.FindAllChildren<RadioButton>(this, []))
+                rb.IsEnabled = true;
+        }
+
         private void ContinueButton_Click(object sender, RoutedEventArgs evt) {
             TabControl.SelectedIndex = 1;
             TabControl.AllowDrop = false;
@@ -210,7 +252,7 @@ namespace Elwig.Windows {
             TabControl.AllowDrop = true;
         }
 
-        private void Document_Drop(object sender, DragEventArgs evt) {
+        private async void Document_Drop(object sender, DragEventArgs evt) {
             if (evt.Data.GetDataPresent(DataFormats.FileDrop)) {
                 var files = (string[])evt.Data.GetData(DataFormats.FileDrop);
                 foreach (var file in files) {
@@ -218,6 +260,8 @@ namespace Elwig.Windows {
                         SelectedDocs.Add(new(DocType.Custom, Path.GetFileName(file), file));
                     }
                 }
+                using var ctx = new AppDbContext();
+                await UpdateRecipients(ctx);
             }
         }
 
@@ -260,8 +304,9 @@ namespace Elwig.Windows {
             }
         }
 
-        private void DocumentAddButton_Click(object sender, RoutedEventArgs evt) {
+        private async void DocumentAddButton_Click(object sender, RoutedEventArgs evt) {
             var idx = AvaiableDocumentsList.SelectedIndex;
+            using var ctx = new AppDbContext();
             if (AvaiableDocumentsList.SelectedItem is not string s)
                 return;
             if (idx == 0) {
@@ -270,20 +315,22 @@ namespace Elwig.Windows {
                 SelectedDocs.Add(new(DocType.DeliveryConfirmation, s, (Year, DocumentNonDeliverersInput.IsChecked == true)));
                 RecipientsDeliveryMembersInput.IsChecked = true;
             } else if (idx >= 2) {
-                using var ctx = new AppDbContext();
                 var name = s.Split(" – ")[^1];
-                var pv = ctx.PaymentVariants.Single(v => v.Year == Year && v.Name == name)!;
+                var pv = await ctx.PaymentVariants.SingleAsync(v => v.Year == Year && v.Name == name)!;
                 SelectedDocs.Add(new(DocType.CreditNote, s, (pv.Year, pv.AvNr)));
                 RecipientsDeliveryMembersInput.IsChecked = true;
             }
             SelectedDocumentsList.SelectedIndex = SelectedDocs.Count - 1;
+            await UpdateRecipients(ctx);
         }
 
-        private void DocumentRemoveButton_Click(object sender, RoutedEventArgs evt) {
+        private async void DocumentRemoveButton_Click(object sender, RoutedEventArgs evt) {
             DeleteCommand.Execute(null);
+            using var ctx = new AppDbContext();
+            await UpdateRecipients(ctx);
         }
 
-        private void SelectDocumentButton_Click(object sender, RoutedEventArgs evt) {
+        private async void SelectDocumentButton_Click(object sender, RoutedEventArgs evt) {
             var d = new OpenFileDialog() {
                 Title = "Dokument auswählen - Elwig",
                 DefaultExt = "pdf",
@@ -296,6 +343,8 @@ namespace Elwig.Windows {
                         SelectedDocs.Add(new(DocType.Custom, Path.GetFileName(file), file));
                     }
                 }
+                using var ctx = new AppDbContext();
+                await UpdateRecipients(ctx);
             }
         }
 
@@ -334,6 +383,7 @@ namespace Elwig.Windows {
 
         private void Date_TextChanged(object sender, RoutedEventArgs evt) {
             Validator.CheckDate((TextBox)sender, true);
+            ResetDocuments();
         }
 
         private void Date_LostFocus(object sender, RoutedEventArgs evt) {
@@ -375,6 +425,8 @@ namespace Elwig.Windows {
                     query = query.Where(m => m.Deliveries.Any(d => d.Year == Year));
                 } else if (RecipientsNonDeliveryMembersInput.IsChecked == true) {
                     query = query.Where(m => m.IsActive && !m.Deliveries.Any(d => d.Year == Year));
+                } else if  (RecipientsActiveMembersInput.IsChecked == true && SelectedDocs.Any(d => d.Type == DocType.DeliveryConfirmation || d.Type == DocType.CreditNote)) {
+                    query = query.Where(m => m.IsActive || m.Deliveries.Any(d => d.Year == Year));
                 } else {
                     query = query.Where(m => m.IsActive);
                 }
@@ -403,6 +455,7 @@ namespace Elwig.Windows {
             PostalWishCount = Recipients.Count(m => m.ContactViaPost);
             var m = EmailAllInput.IsChecked == true ? 3 : EmailWishInput.IsChecked == true ? 2 : 1;
             PostalNoEmailCount = PostalAllCount - (m == 3 ? EmailAllCount : m == 2 ? EmailWishCount : 0);
+            ResetDocuments();
         }
 
         private async Task UpdateTextParameters() {
@@ -458,6 +511,7 @@ namespace Elwig.Windows {
         }
 
         private async void GenerateButton_Click(object sender, RoutedEventArgs evt) {
+            LockInputs();
             PreviewButton.IsEnabled = false;
             PrintButton.IsEnabled = false;
             EmailButton.IsEnabled = false;
@@ -520,6 +574,7 @@ namespace Elwig.Windows {
                         dcData[year] = await DeliveryConfirmationDeliveryData.ForSeason(ctx.DeliveryParts, year);
                     } catch (Exception exc) {
                         MessageBox.Show(exc.Message, "Fehler", MessageBoxButton.OK, MessageBoxImage.Error);
+                        UnlockInputs();
                         GenerateButton.IsEnabled = true;
                         Mouse.OverrideCursor = null;
                         return;
@@ -536,6 +591,7 @@ namespace Elwig.Windows {
                         );
                     } catch (Exception exc) {
                         MessageBox.Show(exc.Message, "Fehler", MessageBoxButton.OK, MessageBoxImage.Error);
+                        UnlockInputs();
                         GenerateButton.IsEnabled = true;
                         Mouse.OverrideCursor = null;
                         return;
@@ -626,6 +682,7 @@ namespace Elwig.Windows {
                 }
             } catch (Exception exc) {
                 MessageBox.Show(exc.Message, "Fehler", MessageBoxButton.OK, MessageBoxImage.Error);
+                UnlockInputs();
                 GenerateButton.IsEnabled = true;
                 Mouse.OverrideCursor = null;
                 return;
@@ -665,6 +722,7 @@ namespace Elwig.Windows {
                     PrintDocument = print;
                 } catch (Exception exc) {
                     MessageBox.Show(exc.Message, "Fehler", MessageBoxButton.OK, MessageBoxImage.Error);
+                    UnlockInputs();
                     GenerateButton.IsEnabled = true;
                     Mouse.OverrideCursor = null;
                     return;
@@ -672,6 +730,7 @@ namespace Elwig.Windows {
             }
             ProgressBar.Value = 100.0;
 
+            UnlockInputs();
             GenerateButton.IsEnabled = true;
             Mouse.OverrideCursor = null;
             PreviewButton.IsEnabled = true;
@@ -705,7 +764,11 @@ namespace Elwig.Windows {
 
         private async void PrintButton_Click(object sender, RoutedEventArgs evt) {
             if (PrintDocument == null) return;
+
             PrintButton.IsEnabled = false;
+            GenerateButton.IsEnabled = false;
+            LockInputs();
+
             var res = MessageBox.Show($"Sollen {PrintDocument.Pages} Blätter ({PrintDocument.TotalPages} Seiten) gedruckt werden?",
                 "Rundschreiben drucken", MessageBoxButton.YesNo, MessageBoxImage.Question, MessageBoxResult.No);
             if (res == MessageBoxResult.Yes) {
@@ -717,13 +780,19 @@ namespace Elwig.Windows {
                 }
                 Mouse.OverrideCursor = null;
             }
+
             PrintButton.IsEnabled = true;
+            GenerateButton.IsEnabled = true;
+            UnlockInputs();
         }
 
         private async void EmailButton_Click(object sender, RoutedEventArgs evt) {
             if (App.Config.Smtp == null || EmailDocuments == null) return;
 
             EmailButton.IsEnabled = false;
+            GenerateButton.IsEnabled = false;
+            LockInputs();
+
             SmtpClient? client = null;
             try {
                 Mouse.OverrideCursor = Cursors.AppStarting;
@@ -754,6 +823,8 @@ namespace Elwig.Windows {
                     msg.Body = body;
                     await client!.SendAsync(msg);
                 }
+
+                MessageBox.Show("Erfolgreich alle E-Mails verschickt!", "Rundschreiben verschicken", MessageBoxButton.OK, MessageBoxImage.Information);
             } catch (Exception exc) {
                 MessageBox.Show(exc.Message, "Fehler", MessageBoxButton.OK, MessageBoxImage.Error);
             } finally {
@@ -761,11 +832,14 @@ namespace Elwig.Windows {
                     await client.DisconnectAsync(true);
                 client?.Dispose();
                 EmailButton.IsEnabled = true;
+                GenerateButton.IsEnabled = true;
+                UnlockInputs();
                 Mouse.OverrideCursor = null;
             }
         }
 
         public void AddDeliveryConfirmation() {
+            if (!GenerateButton.IsEnabled) return;
             AvaiableDocumentsList.SelectedIndex = 1;
             if (AvaiableDocumentsList.SelectedItem is not string s || SelectedDocs.Any(d => d.Type == DocType.DeliveryConfirmation))
                 return;
@@ -775,6 +849,7 @@ namespace Elwig.Windows {
         }
 
         public void AddCreditNote(int index) {
+            if (!GenerateButton.IsEnabled) return;
             AvaiableDocumentsList.SelectedIndex = 2 + index;
             if (AvaiableDocumentsList.SelectedItem is not string s || SelectedDocs.Any(d => d.Type == DocType.CreditNote))
                 return;
@@ -785,5 +860,29 @@ namespace Elwig.Windows {
             SelectedDocumentsList.SelectedIndex = SelectedDocs.Count - 1;
             RecipientsDeliveryMembersInput.IsChecked = true;
         }
+
+        private void DocumentInput_TextChanged(object sender, TextChangedEventArgs evt) {
+            ResetDocuments();
+        }
+
+        private void PostalLocation_TextChanged(object sender, TextChangedEventArgs evt) {
+            ResetDocuments();
+        }
+
+        private void PostalInput_Changed(object sender, RoutedEventArgs evt) {
+            ResetDocuments();
+        }
+
+        private void OrderInput_Changed(object sender, RoutedEventArgs evt) {
+            ResetDocuments();
+        }
+
+        private void DoublePagedInput_Changed(object sender, RoutedEventArgs evt) {
+            ResetDocuments();
+        }
+
+        private void PostalSender_TextChanged(object sender, TextChangedEventArgs evt) {
+            ResetDocuments();
+        }
     }
 }