diff --git a/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list-container.component.ts b/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list-container.component.ts
index 14c858585f1b747ec7175b1d717c13f23e44d547..e54a97d76e30ce012ed455937273d21621101dcb 100644
--- a/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list-container.component.ts
+++ b/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list-container.component.ts
@@ -25,7 +25,7 @@ import { ON_PAGE, PostfachMailListResource, PostfachService } from '@alfa-client
 import { isNotNull, StateResource } from '@alfa-client/tech-shared';
 import { VorgangWithEingangResource } from '@alfa-client/vorgang-shared';
 import { Component, Input, OnChanges } from '@angular/core';
-import { Observable } from 'rxjs';
+import { Observable, tap } from 'rxjs';
 
 @Component({
   selector: 'alfa-postfach-mail-list-container',
@@ -43,9 +43,12 @@ export class PostfachMailListContainerComponent implements OnChanges {
   ngOnChanges() {
     if (isNotNull(this.vorgangStateResource)) {
       this.reloadPostfachMailListOnVorgangReload();
-      this.postfachMailListStateResource$ = this.postfachService.getPostfachMailListByGivenVorgang(
-        this.vorgangStateResource.resource,
-      );
+      this.postfachMailListStateResource$ = this.postfachService
+        .getPostfachMailListByGivenVorgang(this.vorgangStateResource.resource)
+        .pipe(
+          tap(console.log),
+          tap(() => console.log(this.vorgangStateResource.resource)),
+        );
     }
   }
 
diff --git a/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/mailbox-icon/mailbox-icon.component.html b/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/mailbox-icon/mailbox-icon.component.html
new file mode 100644
index 0000000000000000000000000000000000000000..cddc9a7eede7941afbb4fcf20d31116a145140de
--- /dev/null
+++ b/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/mailbox-icon/mailbox-icon.component.html
@@ -0,0 +1,5 @@
+@if(hasNewPostfachNachricht){
+  <ods-mailbox-icon showBadge="true" badgeClass="bg-blue-500"/>
+}@else{
+  <ods-mailbox-icon/>
+}
\ No newline at end of file
diff --git a/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/mailbox-icon/mailbox-icon.component.spec.ts b/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/mailbox-icon/mailbox-icon.component.spec.ts
new file mode 100644
index 0000000000000000000000000000000000000000..cf1f2c547ee7556bff8b58058cb82e15eb403cec
--- /dev/null
+++ b/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/mailbox-icon/mailbox-icon.component.spec.ts
@@ -0,0 +1,46 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { getElementFromFixtureByType } from '@alfa-client/test-utils';
+import { MailboxIconComponent } from '@ods/system';
+import { MockComponent } from 'ng-mocks';
+import { PostfachMailListMailboxIconComponent } from './mailbox-icon.component';
+
+describe('PostfachMailListMailboxIconComponent', () => {
+  let component: PostfachMailListMailboxIconComponent;
+  let fixture: ComponentFixture<PostfachMailListMailboxIconComponent>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [PostfachMailListMailboxIconComponent],
+      declarations: [MockComponent(MailboxIconComponent)],
+    }).compileComponents();
+
+    fixture = TestBed.createComponent(PostfachMailListMailboxIconComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+
+  describe('mailboxIcon', () => {
+    it('should show badge when there is a new message', () => {
+      component.hasNewPostfachNachricht = true;
+
+      fixture.detectChanges();
+
+      const mailboxIcon: MailboxIconComponent = getElementFromFixtureByType(fixture, MailboxIconComponent);
+      expect(mailboxIcon.showBadge).toBeTruthy();
+    });
+
+    it('should not show badge when there is no new message', () => {
+      component.hasNewPostfachNachricht = false;
+
+      fixture.detectChanges();
+
+      const mailboxIcon: MailboxIconComponent = getElementFromFixtureByType(fixture, MailboxIconComponent);
+      expect(mailboxIcon.showBadge).toBeFalsy();
+    });
+  });
+});
diff --git a/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/mailbox-icon/mailbox-icon.component.ts b/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/mailbox-icon/mailbox-icon.component.ts
new file mode 100644
index 0000000000000000000000000000000000000000..7e64a6350f8d1749ccfa7e09250b6e2b6d0ff321
--- /dev/null
+++ b/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/mailbox-icon/mailbox-icon.component.ts
@@ -0,0 +1,12 @@
+import { Component, Input } from '@angular/core';
+import { MailboxIconComponent } from '@ods/system';
+
+@Component({
+  selector: 'alfa-postfach-mail-list-mailbox-icon',
+  standalone: true,
+  imports: [MailboxIconComponent],
+  templateUrl: './mailbox-icon.component.html',
+})
+export class PostfachMailListMailboxIconComponent {
+  @Input() hasNewPostfachNachricht: boolean;
+}
diff --git a/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/postfach-mail-list.component.html b/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/postfach-mail-list.component.html
index 44d553b95fc0e784b4d66bcd22287e9700325f8a..e2d1ac682538390c793e2379973c4913987b8b14 100644
--- a/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/postfach-mail-list.component.html
+++ b/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/postfach-mail-list.component.html
@@ -25,6 +25,7 @@
 -->
 <div class="nachrichten-header">
   <h3 class="nachrichten">Nachrichten</h3>
+  <alfa-postfach-mail-list-mailbox-icon [hasNewPostfachNachricht]="vorgangStateResource.resource.hasNewPostfachNachricht" />
   <alfa-postfach-mail-pdf-button-container
     [postfachMailListResource]="postfachMailListStateResource.resource"
   ></alfa-postfach-mail-pdf-button-container>
diff --git a/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/postfach-mail-list.component.spec.ts b/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/postfach-mail-list.component.spec.ts
index bad2ceb1eaf216b0611dc18a2211c7b33635a9d5..1a071c69c519f613d734ae2012a880645881e3e1 100644
--- a/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/postfach-mail-list.component.spec.ts
+++ b/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/postfach-mail-list.component.spec.ts
@@ -21,7 +21,6 @@
  * Die sprachspezifischen Genehmigungen und Beschränkungen
  * unter der Lizenz sind dem Lizenztext zu entnehmen.
  */
-import { ComponentFixture, TestBed } from '@angular/core/testing';
 import { PostfachMailListLinkRel } from '@alfa-client/postfach-shared';
 import {
   ConvertForDataTestPipe,
@@ -30,15 +29,17 @@ import {
   ToEmbeddedResourcesPipe,
   createStateResource,
 } from '@alfa-client/tech-shared';
-import { getElementFromFixture, getMockComponent } from '@alfa-client/test-utils';
+import { getElementFromFixture, getElementFromFixtureByType, getMockComponent } from '@alfa-client/test-utils';
 import { ExpansionPanelComponent, SpinnerComponent } from '@alfa-client/ui';
 import { VorgangWithEingangResource } from '@alfa-client/vorgang-shared';
+import { ComponentFixture, TestBed } from '@angular/core/testing';
 import { createPostfachMailListResource } from 'libs/postfach-shared/test/postfach';
 import { getDataTestIdOf } from 'libs/tech-shared/test/data-test';
 import { MockComponent } from 'ng-mocks';
 import { createVorgangWithEingangResource } from '../../../../../vorgang-shared/test/vorgang';
 import { PostfachMailButtonContainerComponent } from '../../postfach-mail-button-container/postfach-mail-button-container.component';
 import { PostfachMailPdfButtonContainerComponent } from '../../postfach-mail-pdf-button-container/postfach-mail-pdf-button-container.component';
+import { PostfachMailListMailboxIconComponent } from './mailbox-icon/mailbox-icon.component';
 import { PostfachMailListComponent } from './postfach-mail-list.component';
 import { PostfachMailComponent } from './postfach-mail/postfach-mail.component';
 
@@ -49,9 +50,7 @@ describe('PostfachMailListComponent', () => {
   const postfachMailButton: string = getDataTestIdOf('postfach-mail-button-container');
   const noPostfachText: string = getDataTestIdOf('no-postfach-text');
 
-  const vorgangStateResource: StateResource<VorgangWithEingangResource> = createStateResource(
-    createVorgangWithEingangResource(),
-  );
+  const vorgangStateResource: StateResource<VorgangWithEingangResource> = createStateResource(createVorgangWithEingangResource());
 
   beforeEach(async () => {
     await TestBed.configureTestingModule({
@@ -65,6 +64,7 @@ describe('PostfachMailListComponent', () => {
         MockComponent(SpinnerComponent),
         MockComponent(PostfachMailButtonContainerComponent),
         MockComponent(PostfachMailPdfButtonContainerComponent),
+        MockComponent(PostfachMailListMailboxIconComponent),
       ],
     }).compileComponents();
   });
@@ -105,9 +105,7 @@ describe('PostfachMailListComponent', () => {
 
   describe('postfach does not exists', () => {
     beforeEach(() => {
-      component.postfachMailListStateResource = createStateResource(
-        createPostfachMailListResource(),
-      );
+      component.postfachMailListStateResource = createStateResource(createPostfachMailListResource());
       fixture.detectChanges();
     });
 
@@ -126,12 +124,23 @@ describe('PostfachMailListComponent', () => {
 
   describe('postfachMail component', () => {
     it('should have been called with vorgangStateResource', () => {
-      const postfachMailComponent: PostfachMailComponent = getMockComponent(
-        fixture,
-        PostfachMailComponent,
-      );
+      const postfachMailComponent: PostfachMailComponent = getMockComponent(fixture, PostfachMailComponent);
 
       expect(postfachMailComponent.vorgangStateResource).toBe(vorgangStateResource);
     });
   });
+
+  describe('mailbox icon', () => {
+    it('should exist', () => {
+      component.vorgangStateResource.resource.hasNewPostfachNachricht = false;
+
+      fixture.detectChanges();
+
+      const mailboxIcon: PostfachMailListMailboxIconComponent = getElementFromFixtureByType(
+        fixture,
+        PostfachMailListMailboxIconComponent,
+      );
+      expect(mailboxIcon.hasNewPostfachNachricht).toEqual(false);
+    });
+  });
 });
diff --git a/alfa-client/libs/postfach/src/lib/postfach.module.ts b/alfa-client/libs/postfach/src/lib/postfach.module.ts
index 88fd93b41fff801fb308bfc6a227483cc5042fc4..b87e4a8bb6ed94b3932ee2e2b4494eb4471676a5 100644
--- a/alfa-client/libs/postfach/src/lib/postfach.module.ts
+++ b/alfa-client/libs/postfach/src/lib/postfach.module.ts
@@ -24,7 +24,17 @@
 import { BinaryFileModule } from '@alfa-client/binary-file';
 import { ON_PAGE, PostfachSharedModule } from '@alfa-client/postfach-shared';
 import { ConvertForDataTestPipe, FormatDateWithTimePipe, HasLinkPipe, ToEmbeddedResourcesPipe } from '@alfa-client/tech-shared';
-import { BackButtonComponent, CheckboxEnumEditorComponent, IconButtonWithSpinnerComponent, OzgcloudIconComponent, OzgcloudStrokedButtonWithSpinnerComponent, OzgcloudTextEditorComponent, SpinnerComponent, SubnavigationComponent, TextAreaEditorComponent, } from '@alfa-client/ui';
+import {
+  BackButtonComponent,
+  CheckboxEnumEditorComponent,
+  IconButtonWithSpinnerComponent,
+  OzgcloudIconComponent,
+  OzgcloudStrokedButtonWithSpinnerComponent,
+  OzgcloudTextEditorComponent,
+  SpinnerComponent,
+  SubnavigationComponent,
+  TextAreaEditorComponent,
+} from '@alfa-client/ui';
 import { UserProfileModule } from '@alfa-client/user-profile';
 import { VorgangSharedUiModule } from '@alfa-client/vorgang-shared-ui';
 import { CommonModule } from '@angular/common';
@@ -39,6 +49,7 @@ import { PostfachMailButtonComponent } from './postfach-mail-button-container/po
 import { PostfachMailFormComponent } from './postfach-mail-form/postfach-mail-form.component';
 import { PostfachNachrichtReplyEditorContainerComponent } from './postfach-mail-form/postfach-nachricht-reply-editor-container/postfach-nachricht-reply-editor-container.component';
 import { PostfachMailListContainerComponent } from './postfach-mail-list-container/postfach-mail-list-container.component';
+import { PostfachMailListMailboxIconComponent } from './postfach-mail-list-container/postfach-mail-list/mailbox-icon/mailbox-icon.component';
 import { PostfachMailListComponent } from './postfach-mail-list-container/postfach-mail-list/postfach-mail-list.component';
 import { IncommingMailComponent } from './postfach-mail-list-container/postfach-mail-list/postfach-mail/incomming-mail/incomming-mail.component';
 import { OutgoingMailErrorContainerComponent } from './postfach-mail-list-container/postfach-mail-list/postfach-mail/outgoing-mail/outgoing-mail-error-container/outgoing-mail-error-container.component';
@@ -89,6 +100,7 @@ const routes: Routes = [
     MailboxIconComponent,
     TooltipDirective,
     MultiFileUploadComponent,
+    PostfachMailListMailboxIconComponent,
   ],
   declarations: [
     PostfachMailListContainerComponent,