diff --git a/alfa-client/libs/postfach-shared/src/lib/postfach.service.spec.ts b/alfa-client/libs/postfach-shared/src/lib/postfach.service.spec.ts
index ba5855b3d3b59607a10a65179a6af92cad3a39aa..08fe1caa948dd2a6c4f4c200d45d2b331bdd87af 100644
--- a/alfa-client/libs/postfach-shared/src/lib/postfach.service.spec.ts
+++ b/alfa-client/libs/postfach-shared/src/lib/postfach.service.spec.ts
@@ -26,6 +26,7 @@ import { CommandResource, CommandService } from '@alfa-client/command-shared';
 import { NavigationFacade, NavigationService, RouteData } from '@alfa-client/navigation-shared';
 import {
   createEmptyStateResource,
+  createErrorStateResource,
   createLoadingStateResource,
   createStateResource,
   StateResource,
@@ -43,6 +44,7 @@ import { CommandLinkRel } from 'libs/command-shared/src/lib/command.linkrel';
 import { createCommandErrorResource, createCommandResource } from 'libs/command-shared/test/command';
 import { createVorgangWithEingangResource } from 'libs/vorgang-shared/test/vorgang';
 import { BehaviorSubject, Observable, of } from 'rxjs';
+import { createProblemDetail } from '../../../tech-shared/test/error';
 import { multipleCold, singleColdCompleted, singleHot } from '../../../tech-shared/test/marbles';
 import {
   createPostfachFeatures,
@@ -513,14 +515,12 @@ describe('PostfachService', () => {
   });
 
   describe('loadPostfachMailList', () => {
-    const postfachMailList: PostfachMailListResource = createPostfachMailListResource();
-
     beforeEach(() => {
-      repository.loadPostfachMailList.mockReturnValue(of(postfachMailList));
       service._setPostfachMailListLoading = jest.fn();
-      service._setPostfachMailList = jest.fn();
-      vorgangService.getVorgangWithEingang.mockReturnValue(of(createStateResource(createVorgangWithEingangResource())));
+      service._handleVorgangError = jest.fn();
+      service.loadPostfachMailsByVorgang = jest.fn();
     });
+
     it('should set loading to true', () => {
       service._loadPostfachMailList();
 
@@ -533,16 +533,38 @@ describe('PostfachService', () => {
       expect(vorgangService.getVorgangWithEingang).toHaveBeenCalled();
     });
 
-    it('should call repository', () => {
+    it('should handle vorgang error', () => {
       service._loadPostfachMailList();
 
-      expect(repository.loadPostfachMailList).toHaveBeenCalled();
+      expect(service._handleVorgangError).toHaveBeenCalledWith(vorgangWithEingangStateResource);
     });
 
-    it('should set loading to false', () => {
+    it('should call loadPostfachMailsByVorgang', () => {
       service._loadPostfachMailList();
 
-      expect(service._setPostfachMailList).toHaveBeenCalled();
+      expect(service.loadPostfachMailsByVorgang).toHaveBeenCalledWith(vorgang);
+    });
+  });
+
+  describe('handleVorgangError', () => {
+    beforeEach(() => {
+      service.postfachMailList$.next = jest.fn();
+    });
+
+    it('should set error', () => {
+      const errorState: StateResource<VorgangWithEingangResource> = createErrorStateResource(createProblemDetail());
+
+      service._handleVorgangError(errorState);
+
+      expect(service.postfachMailList$.next).toHaveBeenCalledWith(errorState);
+    });
+
+    it('should not set if there is no error', () => {
+      const errorState: StateResource<VorgangWithEingangResource> = createStateResource(vorgang);
+
+      service._handleVorgangError(errorState);
+
+      expect(service.postfachMailList$.next).not.toHaveBeenCalled();
     });
   });
 
@@ -576,8 +598,6 @@ describe('PostfachService', () => {
   });
 
   describe('isDownloadPdfInProgress', () => {
-    const vorgang: VorgangWithEingangResource = createVorgangWithEingangResource();
-
     it('should call facade to download pdf', (done) => {
       vorgangService.getVorgangWithEingang.mockReturnValue(of(createStateResource(vorgang)));
       postfachFacade.isDownloadPdfInProgress.mockReturnValue(of(true));
diff --git a/alfa-client/libs/postfach-shared/src/lib/postfach.service.ts b/alfa-client/libs/postfach-shared/src/lib/postfach.service.ts
index 957de44c04dc22d0223151999119fb0a2c7fa350..64c238ddfa7e4609433ef21659d44ef364f3f166 100644
--- a/alfa-client/libs/postfach-shared/src/lib/postfach.service.ts
+++ b/alfa-client/libs/postfach-shared/src/lib/postfach.service.ts
@@ -35,6 +35,7 @@ import {
 import { NavigationFacade, NavigationService, RouteData } from '@alfa-client/navigation-shared';
 import {
   createEmptyStateResource,
+  createErrorStateResource,
   createLoadingStateResource,
   createStateResource,
   doIfLoadingRequired,
@@ -326,12 +327,20 @@ export class PostfachService {
     this._setPostfachMailListLoading();
     this.vorgangService
       .getVorgangWithEingang()
-      .pipe(filter(isLoaded), take(1))
+      .pipe(
+        tap((state: StateResource<VorgangWithEingangResource>) => this._handleVorgangError(state)),
+        filter(isLoaded),
+        take(1),
+      )
       .subscribe((vorgangWithEingangStateResource) => {
         this.loadPostfachMailsByVorgang(vorgangWithEingangStateResource.resource);
       });
   }
 
+  _handleVorgangError(state: StateResource<VorgangWithEingangResource>): void {
+    if (state.error) this.postfachMailList$.next(createErrorStateResource(state.error));
+  }
+
   _refreshVorgangSubscription(): void {
     this.vorgangChangeSubscription.unsubscribe();
     this._listenToVorgangChange();
@@ -367,12 +376,15 @@ export class PostfachService {
   }
 
   public loadPostfachMailsByVorgang(vorgang: VorgangResource): void {
-    this.loadPostfachMailSubscription = this.repository.loadPostfachMailList(vorgang).subscribe((postfachMaiList) => {
-      if (!isNull(postfachMaiList)) {
-        this._setPostfachMailList(postfachMaiList);
-        setTimeout(() => this.loadPostfachMailSubscription.unsubscribe(), 0);
-      }
-    });
+    this.loadPostfachMailSubscription = this.repository
+      .loadPostfachMailList(vorgang)
+      .pipe()
+      .subscribe((postfachMaiList) => {
+        if (!isNull(postfachMaiList)) {
+          this._setPostfachMailList(postfachMaiList);
+          setTimeout(() => this.loadPostfachMailSubscription.unsubscribe(), 0);
+        }
+      });
   }
 
   _setPostfachMailList(postfachMailList: PostfachMailListResource): void {
diff --git a/alfa-client/libs/postfach/src/lib/postfach-page-container/postfach-page/postfach-page-mail-list/postfach-page-mail-list.component.html b/alfa-client/libs/postfach/src/lib/postfach-page-container/postfach-page/postfach-page-mail-list/postfach-page-mail-list.component.html
index 1729d7519c1a41b14e730394d1fb9b55b962c413..e6ab2f9717f81043221c63057b214b3f6d175f46 100644
--- a/alfa-client/libs/postfach/src/lib/postfach-page-container/postfach-page/postfach-page-mail-list/postfach-page-mail-list.component.html
+++ b/alfa-client/libs/postfach/src/lib/postfach-page-container/postfach-page/postfach-page-mail-list/postfach-page-mail-list.component.html
@@ -24,21 +24,27 @@
 
 -->
 <ozgcloud-spinner [stateResource]="postfachMailListStateResource">
-  @for(postfachMail of postfachMailListStateResource.resource | toEmbeddedResources: postfachMailListLinkRel.POSTFACH_MAIL_LIST; track $index){
-    <alfa-postfach-mail
-
-      [attr.data-test-id]="(postfachMail.subject | convertForDataTest) + '-item'"
-      class="postfach w-full lg:w-1/2"
-      [postfachMail]="postfachMail"
-    />
+  @if (postfachMailListStateResource.resource) {
+    <div data-test-id="postfach-page-mail-list">
+      @for (
+        postfachMail of postfachMailListStateResource.resource | toEmbeddedResources: postfachMailListLinkRel.POSTFACH_MAIL_LIST;
+        track $index
+      ) {
+        <alfa-postfach-mail
+          [attr.data-test-id]="(postfachMail.subject | convertForDataTest) + '-item'"
+          class="postfach w-full lg:w-1/2"
+          [postfachMail]="postfachMail"
+        />
+      }
+
+      <div class="mb-4 ml-6 mt-4 flex gap-4">
+        <alfa-postfach-mail-pdf-button-container
+          [postfachMailListResource]="postfachMailListStateResource.resource"
+          [showButtonWithLabel]="true"
+        />
+
+        <alfa-mail-unread-button-link-container [postfachMailListResource]="postfachMailListStateResource.resource" />
+      </div>
+    </div>
   }
-
-  <div class="mb-4 ml-6 mt-4 flex gap-4">
-    <alfa-postfach-mail-pdf-button-container
-      [postfachMailListResource]="postfachMailListStateResource.resource"
-      [showButtonWithLabel]="true"
-    />
-
-    <alfa-mail-unread-button-link-container [postfachMailListResource]="postfachMailListStateResource.resource" />
-  </div>
 </ozgcloud-spinner>
diff --git a/alfa-client/libs/postfach/src/lib/postfach-page-container/postfach-page/postfach-page-mail-list/postfach-page-mail-list.component.spec.ts b/alfa-client/libs/postfach/src/lib/postfach-page-container/postfach-page/postfach-page-mail-list/postfach-page-mail-list.component.spec.ts
index b6b9acf468b81b2049a7b2e70438926ff66230c6..fc2527033ffe69e2059f4d5c0ef29c6bd483788c 100644
--- a/alfa-client/libs/postfach/src/lib/postfach-page-container/postfach-page/postfach-page-mail-list/postfach-page-mail-list.component.spec.ts
+++ b/alfa-client/libs/postfach/src/lib/postfach-page-container/postfach-page/postfach-page-mail-list/postfach-page-mail-list.component.spec.ts
@@ -22,11 +22,19 @@
  * unter der Lizenz sind dem Lizenztext zu entnehmen.
  */
 import { PostfachMailListResource } from '@alfa-client/postfach-shared';
-import { ConvertForDataTestPipe, createStateResource, HasLinkPipe, ToEmbeddedResourcesPipe } from '@alfa-client/tech-shared';
+import {
+  ConvertForDataTestPipe,
+  createEmptyStateResource,
+  createStateResource,
+  HasLinkPipe,
+  ToEmbeddedResourcesPipe,
+} from '@alfa-client/tech-shared';
+import { existsAsHtmlElement, notExistsAsHtmlElement } from '@alfa-client/test-utils';
 import { SpinnerComponent } from '@alfa-client/ui';
 import { ComponentFixture, TestBed } from '@angular/core/testing';
 import { MockComponent } from 'ng-mocks';
 import { createPostfachMailListResource } from '../../../../../../postfach-shared/test/postfach';
+import { getDataTestIdOf } from '../../../../../../tech-shared/test/data-test';
 import { PostfachMailComponent } from '../../../postfach-mail-list-container/postfach-mail-list/postfach-mail/postfach-mail.component';
 import { PostfachMailPdfButtonContainerComponent } from '../../../postfach-mail-pdf-button-container/postfach-mail-pdf-button-container.component';
 import { MailUnreadButtonLinkContainerComponent } from '../mail-unread-button/mail-unread-button-link-container.component';
@@ -36,6 +44,8 @@ describe('PostfachPageMailListComponent', () => {
   let component: PostfachPageMailListComponent;
   let fixture: ComponentFixture<PostfachPageMailListComponent>;
 
+  const mailList: string = getDataTestIdOf('postfach-page-mail-list');
+
   beforeEach(async () => {
     await TestBed.configureTestingModule({
       declarations: [
@@ -61,4 +71,22 @@ describe('PostfachPageMailListComponent', () => {
   it('should create', () => {
     expect(component).toBeTruthy();
   });
+
+  describe('mail list', () => {
+    it('should exist if resource', () => {
+      component.postfachMailListStateResource = createStateResource<PostfachMailListResource>(createPostfachMailListResource());
+
+      fixture.detectChanges();
+
+      existsAsHtmlElement(fixture, mailList);
+    });
+
+    it('should not exist if no resource', () => {
+      component.postfachMailListStateResource = createEmptyStateResource<PostfachMailListResource>();
+
+      fixture.detectChanges();
+
+      notExistsAsHtmlElement(fixture, mailList);
+    });
+  });
 });
diff --git a/alfa-client/libs/postfach/src/lib/postfach-page-container/postfach-page/postfach-page.component.html b/alfa-client/libs/postfach/src/lib/postfach-page-container/postfach-page/postfach-page.component.html
index 0317a0d0c5b0552dd3484ecc997d3fe0a8e431bd..5b3a6128d731837cef2d40158f1e6534f670604d 100644
--- a/alfa-client/libs/postfach/src/lib/postfach-page-container/postfach-page/postfach-page.component.html
+++ b/alfa-client/libs/postfach/src/lib/postfach-page-container/postfach-page/postfach-page.component.html
@@ -35,6 +35,5 @@
   <h1 data-test-id="postfach-mail-heading" class="pl-7 pt-4 text-lg font-medium">Nachrichten zum Vorgang</h1>
   <alfa-postfach-page-mail-list
     [postfachMailListStateResource]="postfachMailListStateResource"
-    data-test-id="postfach-page-mail-list"
   />
 </div>