diff --git a/app/Filament/Actions/DoneTodoAction.php b/app/Filament/Actions/DoneTodoAction.php
new file mode 100644
index 0000000..c6b37cc
--- /dev/null
+++ b/app/Filament/Actions/DoneTodoAction.php
@@ -0,0 +1,28 @@
+<?php
+
+namespace App\Filament\Actions;
+
+use Filament\Actions\Action;
+use Filament\Support\Icons\Heroicon;
+use Illuminate\Database\Eloquent\Model;
+
+class DoneTodoAction extends Action
+{
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->iconButton()
+            ->label('erledigt')
+            ->tooltip('Todo als erledigt markieren')
+            ->icon(Heroicon::Check)
+            ->visible(function (Model $record) {
+                return $record->is_owner_or_assigned() && $record->done_date == null;
+            })
+            ->action(function (Model $record) {
+                $record->done_date = now()->today();
+                $record->save();
+            });
+    }
+
+}
\ No newline at end of file
diff --git a/app/Filament/Actions/ReopenTodoAction.php b/app/Filament/Actions/ReopenTodoAction.php
new file mode 100644
index 0000000..dc70ee0
--- /dev/null
+++ b/app/Filament/Actions/ReopenTodoAction.php
@@ -0,0 +1,38 @@
+<?php
+
+namespace App\Filament\Actions;
+
+use App\Mail\TodoMail;
+use Filament\Actions\Action;
+use Filament\Forms\Components\TextInput;
+use Filament\Support\Icons\Heroicon;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Support\Facades\Mail;
+
+class ReopenTodoAction extends Action
+{
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->iconButton()
+            ->label('Wiedereröffnen')
+            ->tooltip('Todo wieder eröffnen')
+            ->icon(Heroicon::ArrowUturnDown)
+            ->visible(function (Model $record) {
+                return $record->is_owner_or_assigned() && $record->done_date != null;
+            })
+            ->schema([
+                TextInput::make('notiz')->label('Notiz'),
+            ])
+            ->action(function (Model $record, array $data) {
+                $record->done_date = null;
+                $record->save();
+                $users = $record->getassignetusers();
+                foreach ($users as $user) {
+                    Mail::to($user)->send(new TodoMail($record, 'Todo wiedereröffnet', 'Eine bereits erledigte Todo wurde wiedereröffnet:', notiz: $data['notiz']));
+                }
+            });
+    }
+
+}
\ No newline at end of file
diff --git a/app/Filament/Resources/Todos/Pages/EditTodo.php b/app/Filament/Resources/Todos/Pages/EditTodo.php
index 9854e4a..a4f82df 100644
--- a/app/Filament/Resources/Todos/Pages/EditTodo.php
+++ b/app/Filament/Resources/Todos/Pages/EditTodo.php
@@ -2,9 +2,12 @@
 
 namespace App\Filament\Resources\Todos\Pages;
 
+use App\Filament\Actions\DoneTodoAction;
+use App\Filament\Actions\ReopenTodoAction;
 use App\Filament\Resources\Todos\TodoResource;
 use Filament\Actions\DeleteAction;
 use Filament\Resources\Pages\EditRecord;
+use Filament\Support\Icons\Heroicon;
 
 class EditTodo extends EditRecord
 {
@@ -13,7 +16,9 @@ class EditTodo extends EditRecord
     protected function getHeaderActions(): array
     {
         return [
-            DeleteAction::make(),
+            DoneTodoAction::make('done'),
+            ReopenTodoAction::make('reopen'),
+            DeleteAction::make()->iconButton()->icon(Heroicon::Trash),
         ];
     }
 }
diff --git a/app/Filament/Resources/Todos/Tables/TodosTable.php b/app/Filament/Resources/Todos/Tables/TodosTable.php
index 82e89c8..2a4af7d 100644
--- a/app/Filament/Resources/Todos/Tables/TodosTable.php
+++ b/app/Filament/Resources/Todos/Tables/TodosTable.php
@@ -2,10 +2,13 @@
 
 namespace App\Filament\Resources\Todos\Tables;
 
+use App\Filament\Actions\DoneTodoAction;
+use App\Filament\Actions\ReopenTodoAction;
 use App\Models\Group;
 use App\Models\User;
 use Filament\Actions\Action;
 use Filament\Actions\BulkActionGroup;
+use Filament\Actions\DeleteAction;
 use Filament\Actions\DeleteBulkAction;
 use Filament\Actions\EditAction;
 use Filament\Support\Icons\Heroicon;
@@ -80,14 +83,13 @@ class TodosTable
 
             ])
             ->recordActions([
-                Action::make('done')
-                    ->iconButton()
-                    ->icon(Heroicon::Check)
-                    ->action(function (Model $record) {
-                        $record->done_date = now()->today();
-                        $record->save();
-                    }),
+                DoneTodoAction::make('done'),
+                ReopenTodoAction::make('reopen'),
                 EditAction::make()->iconButton(),
+                DeleteAction::make()->iconButton()
+                    ->visible(function (Model $record) {
+                        return $record->is_owner_or_assigned();
+                    }),
             ])
             ->toolbarActions([
                 BulkActionGroup::make([
diff --git a/app/Filament/Resources/Todos/TodoResource.php b/app/Filament/Resources/Todos/TodoResource.php
index cb30476..d0d31aa 100644
--- a/app/Filament/Resources/Todos/TodoResource.php
+++ b/app/Filament/Resources/Todos/TodoResource.php
@@ -18,7 +18,7 @@ class TodoResource extends Resource
 {
     protected static ?string $model = Todo::class;
 
-    protected static string|BackedEnum|null $navigationIcon = Heroicon::OutlinedRectangleStack;
+    protected static string|BackedEnum|null $navigationIcon = Heroicon::CheckBadge;
 
     protected static ?string $recordTitleAttribute = 'name';
 
diff --git a/app/FollowUpEnum.php b/app/FollowUpEnum.php
new file mode 100644
index 0000000..2e1d89a
--- /dev/null
+++ b/app/FollowUpEnum.php
@@ -0,0 +1,28 @@
+<?php
+
+namespace App;
+
+enum FollowUp: string
+{
+    case TOMORROW = 'tomorrow';
+    case MONDAY = 'monday';
+    case TUESDAY = 'tuesday';
+    case WEDNESDAY = 'wednesday';
+    case THURSTDAY = 'hursday';
+    case FRIDAY = 'friday';
+    case TWO_WEEKS = 'two_weeks';
+
+    public function label(): string
+    {
+        return match($this) {
+            self::TOMORROW => 'Morgen',
+            self::MONDAY => 'Montag',
+            self::TUESDAY => 'Dienstag',
+            self::WEDNESDAY => 'Mittwoch',
+            self::THURSTDAY => 'Donnerstag',
+            self::FRIDAY => 'Freitag',
+            self::TWO_WEEKS => 'In 2 Wochen',
+        };
+    }
+    
+}
diff --git a/app/Mail/TodoMail.php b/app/Mail/TodoMail.php
new file mode 100644
index 0000000..8a878bc
--- /dev/null
+++ b/app/Mail/TodoMail.php
@@ -0,0 +1,68 @@
+<?php
+
+namespace App\Mail;
+
+use App\Filament\Resources\Todos\TodoResource;
+use App\Models\Todo;
+use Illuminate\Bus\Queueable;
+use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Mail\Mailable;
+use Illuminate\Mail\Mailables\Attachment;
+use Illuminate\Mail\Mailables\Content;
+use Illuminate\Mail\Mailables\Envelope;
+use Illuminate\Queue\SerializesModels;
+
+class TodoMail extends Mailable
+{
+    use Queueable, SerializesModels;
+
+    /**
+     * Create a new message instance.
+     */
+    public function __construct(
+        public Todo $todo,
+        public string $mail_subject,
+        public string $message,
+        public string $notiz = "",
+    )
+    {
+        //
+    }
+
+    /**
+     * Get the message envelope.
+     */
+    public function envelope(): Envelope
+    {
+        return new Envelope(
+            subject: $this->mail_subject,
+        );
+    }
+
+    /**
+     * Get the message content definition.
+     */
+    public function content(): Content
+    {
+        return new Content(
+            markdown: 'mail.todo-mail',
+            with: [
+                'message' => $this->message,
+                'subject' => $this->mail_subject,
+                'notiz' => $this->notiz,
+                'todo_url' => TodoResource::getUrl('edit', ['record' => $this->todo]),
+                'todo' => $this->todo,
+            ],
+        );
+    }
+
+    /**
+     * Get the attachments for the message.
+     *
+     * @return array<int, Attachment>
+     */
+    public function attachments(): array
+    {
+        return [];
+    }
+}
diff --git a/app/Models/Todo.php b/app/Models/Todo.php
index 30d2317..5aad3ef 100644
--- a/app/Models/Todo.php
+++ b/app/Models/Todo.php
@@ -4,6 +4,7 @@ namespace App\Models;
 
 use App\Observers\TodoObserver;
 use Illuminate\Database\Eloquent\Attributes\Fillable;
+use Illuminate\Database\Eloquent\Attributes\ObservedBy;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Relations\MorphTo;
@@ -21,4 +22,16 @@ class Todo extends Model
     {
         return $this->belongsTo(User::class);
     }
+
+    public function is_owner_or_assigned() {
+        if(filament()->auth()->user()->id == $this->user_id) return true;
+        if($this->todoable_type == Group::class && in_array(filament()->auth()->user()->id, $this->todoable()->first()->get()->users()->get()->pluck('id')->toArray())) return true;
+        if($this->todoable_type == User::class && $this->todoable()->first()->get()->id == filament()->auth()->user()->id) return true;
+        else return false;
+    }
+
+    public function getassignetusers() {
+        if($this->todoable_type == Group::class) return $this->todoable()->first()->users()->get();
+        if($this->todoable_type == User::class) return [$this->todoable()->first()->get()];
+    }
 }
diff --git a/app/Observers/TodoObserver.php b/app/Observers/TodoObserver.php
index db90a70..e0fb949 100644
--- a/app/Observers/TodoObserver.php
+++ b/app/Observers/TodoObserver.php
@@ -2,7 +2,16 @@
 
 namespace App\Observers;
 
+use App\Mail\TodoAssigned;
+use App\Mail\TodoCreated;
+use App\Mail\TodoMail;
+use App\Mail\TodoNeedsReview;
+use App\Mail\TodoReopened;
+use App\Models\Group;
 use App\Models\Todo;
+use App\Models\User;
+use Illuminate\Support\Facades\Mail;
+use Illuminate\Support\Str;
 
 class TodoObserver
 {
@@ -11,7 +20,17 @@ class TodoObserver
      */
     public function created(Todo $todo): void
     {
-        //
+        if($todo->todoable_type == null) return;
+        // if($todo->todoable_type == User::class && $todo->user_id == $todo->todoable_id) return;
+        if($todo->todoable_type == User::class) {
+            Mail::to(User::find($todo->todoable()->first()))->send(new TodoMail($todo, 'Neue Todo', 'Es gibt eine neue Todo für dich:'));
+        }
+        else {
+            $users = $todo->todoable()->first()->users()->get();
+            foreach ($users as $user) {
+                Mail::to($user)->send(new TodoMail($todo, 'Neue Todo', 'Es gibt eine neue Todo für dich:'));
+            }
+        }
     }
 
     /**
@@ -19,7 +38,18 @@ class TodoObserver
      */
     public function updated(Todo $todo): void
     {
-        //
+        $hasChanged = $todo->getChanges();
+        if ($hasChanged && isset($hasChanged['done_date']) && $todo->done_date != null) {
+            $user = User::find($todo->user_id);
+            Mail::to($user)->send(new TodoMail($todo, 'Todo erledigt', 'Todo erledigt, du wolltest, dass du Bescheid bekommst:'));
+        }
+        if ($hasChanged && (isset($hasChanged['todoable_type']) || isset($hasChanged['todoable_id']))) {
+            $users = $todo->getassignetusers();
+            foreach ($users as $user) {
+                Mail::to($user)->send(new TodoMail($todo, 'Todo zugewiesen', 'Dir wurde eine bestehende Todo zugewiesen:'));
+            }
+
+        }
     }
 
     /**
diff --git a/resources/views/mail/todo-mail.blade.php b/resources/views/mail/todo-mail.blade.php
new file mode 100644
index 0000000..230d164
--- /dev/null
+++ b/resources/views/mail/todo-mail.blade.php
@@ -0,0 +1,24 @@
+<x-mail::message>
+# {{ $subject }}
+
+Hi,
+
+{{ $message }}
+
+{{ $notiz }}
+
+## <a href="{{ $todo_url }}">{{ $todo->name }}:</a>
+
+Erstellt von: {{ $todo->user->name }}
+Zugewiesen: {{ $todo->todoable->name }}
+
+Inhalt:
+{!! $todo->content !!}
+
+<x-mail::button :url="$todo_url" color="primary">
+Todo im Cockpit ansehen
+</x-mail::button>
+
+Danke,<br>
+{{ config('app.name') }}
+</x-mail::message>