diff --git a/alfa-client/libs/navigation-shared/src/lib/navigation.service.spec.ts b/alfa-client/libs/navigation-shared/src/lib/navigation.service.spec.ts
index 2dfb53b8b701d62064bc186796bcb2ec4edfacb8..04f3545432eb35d5708831e03e7fb0587ca47248 100644
--- a/alfa-client/libs/navigation-shared/src/lib/navigation.service.spec.ts
+++ b/alfa-client/libs/navigation-shared/src/lib/navigation.service.spec.ts
@@ -78,10 +78,7 @@ describe('NavigationService', () => {
 
         service.navigateToVorgangList();
 
-        expect(router.navigate).toHaveBeenCalledWith([
-          NavigationService.ROOT_PATH,
-          NavigationService.URL_PARAM_ALLE,
-        ]);
+        expect(router.navigate).toHaveBeenCalledWith([NavigationService.ROOT_PATH, NavigationService.URL_PARAM_ALLE]);
       });
 
       it('should navigate to meine with url containing "meine"', () => {
@@ -89,10 +86,7 @@ describe('NavigationService', () => {
 
         service.navigateToVorgangList();
 
-        expect(router.navigate).toHaveBeenCalledWith([
-          NavigationService.ROOT_PATH,
-          NavigationService.URL_PARAM_MY_VORGAENGE,
-        ]);
+        expect(router.navigate).toHaveBeenCalledWith([NavigationService.ROOT_PATH, NavigationService.URL_PARAM_MY_VORGAENGE]);
       });
 
       it('should navigate to all with url containing "alle"', () => {
@@ -100,10 +94,7 @@ describe('NavigationService', () => {
 
         service.navigateToVorgangList();
 
-        expect(router.navigate).toHaveBeenCalledWith([
-          NavigationService.ROOT_PATH,
-          NavigationService.URL_PARAM_ALLE,
-        ]);
+        expect(router.navigate).toHaveBeenCalledWith([NavigationService.ROOT_PATH, NavigationService.URL_PARAM_ALLE]);
       });
 
       it('should navigate to unassigned with url containing "unassigned"', () => {
@@ -111,10 +102,7 @@ describe('NavigationService', () => {
 
         service.navigateToVorgangList();
 
-        expect(router.navigate).toHaveBeenCalledWith([
-          NavigationService.ROOT_PATH,
-          NavigationService.URL_PARAM_UNASSIGNED,
-        ]);
+        expect(router.navigate).toHaveBeenCalledWith([NavigationService.ROOT_PATH, NavigationService.URL_PARAM_UNASSIGNED]);
       });
     });
 
@@ -243,6 +231,21 @@ describe('NavigationService', () => {
     });
   });
 
+  describe('navigate to postfach', () => {
+    it('should navigate to postfach', () => {
+      const linkUri: string = 'dummyUri';
+
+      service.navigateToPostfach(linkUri);
+
+      expect(router.navigate).toHaveBeenCalledWith([
+        NavigationService.ROOT_PATH,
+        NavigationService.URL_PARAM_POSTFACH,
+        linkUri,
+        NavigationService.URL_PARAM_POSTFACH,
+      ]);
+    });
+  });
+
   describe('is postfach page', () => {
     it('should return true if "postfach" exists in url', () => {
       service.routeUrlSegment$.next(<any>[{ path: 'postfach' }]);
diff --git a/alfa-client/libs/navigation-shared/src/lib/navigation.service.ts b/alfa-client/libs/navigation-shared/src/lib/navigation.service.ts
index 7b1c65e93ef278fb0fd09c73a5fcb5403ab5ea36..bbed71d0f1ba1d099ea158c114108f7d0a87d8e1 100644
--- a/alfa-client/libs/navigation-shared/src/lib/navigation.service.ts
+++ b/alfa-client/libs/navigation-shared/src/lib/navigation.service.ts
@@ -21,22 +21,9 @@
  * Die sprachspezifischen Genehmigungen und Beschränkungen
  * unter der Lizenz sind dem Lizenztext zu entnehmen.
  */
-import {
-  decodeUrlFromEmbedding,
-  isEmptyObject,
-  isNotNil,
-  isNotNull,
-  isNotUndefined,
-} from '@alfa-client/tech-shared';
+import { decodeUrlFromEmbedding, isEmptyObject, isNotNil, isNotNull, isNotUndefined } from '@alfa-client/tech-shared';
 import { Injectable } from '@angular/core';
-import {
-  ActivatedRoute,
-  NavigationEnd,
-  PRIMARY_OUTLET,
-  Params,
-  Router,
-  UrlSegment,
-} from '@angular/router';
+import { ActivatedRoute, NavigationEnd, PRIMARY_OUTLET, Params, Router, UrlSegment } from '@angular/router';
 import { ResourceUri } from '@ngxp/rest';
 import { OAuthService } from 'angular-oauth2-oidc';
 import { has, isNil, isUndefined } from 'lodash-es';
@@ -55,6 +42,7 @@ export class NavigationService {
 
   public static readonly URL_PARAM_MY_VORGAENGE: string = 'meine';
   public static readonly URL_PARAM_MY_VORGANG: string = 'vorgang';
+  public static readonly URL_PARAM_POSTFACH: string = 'postfach';
   public static readonly URL_PARAM_ALLE: string = 'alle';
   public static readonly URL_PARAM_SEARCH: string = 'search';
   public static readonly URL_PARAM_UNASSIGNED: string = 'unassigned';
@@ -62,12 +50,10 @@ export class NavigationService {
   public readonly VORGANG_WITH_EINGANG_URL: string = 'vorgangWithEingangUrl';
 
   static readonly ROOT_PATH: string = '/';
-  static readonly VORGANG_BASE_PATH: string =
-    NavigationService.ROOT_PATH + NavigationService.URL_PARAM_MY_VORGANG + '/';
+  static readonly VORGANG_BASE_PATH: string = NavigationService.ROOT_PATH + NavigationService.URL_PARAM_MY_VORGANG + '/';
   public static readonly MEINE_VORGAENGE_PATH: string =
     NavigationService.ROOT_PATH + NavigationService.URL_PARAM_MY_VORGAENGE + '/';
-  public static readonly ALLE_VORGAENGE_PATH: string =
-    NavigationService.ROOT_PATH + NavigationService.URL_PARAM_ALLE + '/';
+  public static readonly ALLE_VORGAENGE_PATH: string = NavigationService.ROOT_PATH + NavigationService.URL_PARAM_ALLE + '/';
   public static readonly UNASSIGNED_VORGAENGE_PATH: string =
     NavigationService.ROOT_PATH + NavigationService.URL_PARAM_UNASSIGNED + '/';
 
@@ -90,9 +76,7 @@ export class NavigationService {
   }
 
   private prefillRouterData(): void {
-    this.getLastFirstChild(this.activatedRoute.root).params.subscribe((params: Params) =>
-      this.routeParameter$.next(params),
-    );
+    this.getLastFirstChild(this.activatedRoute.root).params.subscribe((params: Params) => this.routeParameter$.next(params));
   }
 
   private subscribeToRouterEvents(): void {
@@ -170,10 +154,7 @@ export class NavigationService {
   }
 
   private isParamPresent(paramName: string): boolean {
-    return (
-      isEmptyObject(this.routeParameter$.value) ||
-      isUndefined(this.routeParameter$.value[paramName])
-    );
+    return isEmptyObject(this.routeParameter$.value) || isUndefined(this.routeParameter$.value[paramName]);
   }
 
   static isVorgangListPage(params: Params): boolean {
@@ -207,9 +188,7 @@ export class NavigationService {
 
   getFilterPathSegment(): string {
     const firstPathSegment: string = this.router.url.split('/')[1];
-    return this.isFilterPathSegment(firstPathSegment) ? firstPathSegment : (
-        NavigationService.URL_PARAM_ALLE
-      );
+    return this.isFilterPathSegment(firstPathSegment) ? firstPathSegment : NavigationService.URL_PARAM_ALLE;
   }
 
   isFilterPathSegment(pathSegment: string): boolean {
@@ -225,10 +204,15 @@ export class NavigationService {
   }
 
   public navigateToVorgang(linkUri: ResourceUri): void {
+    this.router.navigate([NavigationService.ROOT_PATH, NavigationService.URL_PARAM_MY_VORGANG, linkUri]);
+  }
+
+  public navigateToPostfach(linkUri: string): void {
     this.router.navigate([
       NavigationService.ROOT_PATH,
       NavigationService.URL_PARAM_MY_VORGANG,
       linkUri,
+      NavigationService.URL_PARAM_POSTFACH,
     ]);
   }
 
diff --git a/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/postfach-mail/outgoing-mail/outgoing-mail.component.html b/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/postfach-mail/outgoing-mail/outgoing-mail.component.html
index a3d8233fccdc8cd9d12bf0a8bc3537284981e667..a68841eeddb6af5686cbe780c717eb93925ebe79 100644
--- a/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/postfach-mail/outgoing-mail/outgoing-mail.component.html
+++ b/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/postfach-mail/outgoing-mail/outgoing-mail.component.html
@@ -25,7 +25,7 @@
 -->
 <a
   [ngClass]="{ error: postfachMail | hasLink: postfachNachrichtLinkRel.RESEND_POSTFACH_MAIL }"
-  [routerLink]="onPage ? null : 'postfach'"
+  (click)="navigateToPostfach()"
   data-test-class="outgoing-mail-routing"
 >
   <div class="mail-head">
diff --git a/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/postfach-mail/outgoing-mail/outgoing-mail.component.spec.ts b/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/postfach-mail/outgoing-mail/outgoing-mail.component.spec.ts
index 1c5549014cf02065fcac328e8e38dbd3505f9f98..9e7f0160b17a65ff76f6781c04e3630da52062f4 100644
--- a/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/postfach-mail/outgoing-mail/outgoing-mail.component.spec.ts
+++ b/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/postfach-mail/outgoing-mail/outgoing-mail.component.spec.ts
@@ -21,20 +21,21 @@
  * Die sprachspezifischen Genehmigungen und Beschränkungen
  * unter der Lizenz sind dem Lizenztext zu entnehmen.
  */
-import { ON_PAGE, PostfachMailLinkRel, PostfachMailResource } from '@alfa-client/postfach-shared';
+import { ON_PAGE, PostfachMailLinkRel, PostfachMailResource, PostfachService } from '@alfa-client/postfach-shared';
 import { createStateResource, HasLinkPipe, StateResource } from '@alfa-client/tech-shared';
 import {
+  dispatchEventFromFixture,
   existsAsHtmlElement,
-  getDebugElementFromFixtureByCss,
   getElementFromFixture,
   getMockComponent,
+  Mock,
+  mock,
   notExistsAsHtmlElement,
 } from '@alfa-client/test-utils';
 import { UserProfileInPostfachMailContainerComponent } from '@alfa-client/user-profile';
 import { VorgangWithEingangResource } from '@alfa-client/vorgang-shared';
 import { ComponentFixture, TestBed } from '@angular/core/testing';
 import { MatIcon } from '@angular/material/icon';
-import { provideRouter, RouterLinkWithHref, RouterModule } from '@angular/router';
 import { getDataTestClassOf, getDataTestIdOf } from 'libs/tech-shared/test/data-test';
 import { createVorgangWithEingangResource } from 'libs/vorgang-shared/test/vorgang';
 import { MockComponent } from 'ng-mocks';
@@ -48,6 +49,8 @@ describe('OutgoingMailComponent', () => {
   let component: OutgoingMailComponent;
   let fixture: ComponentFixture<OutgoingMailComponent>;
 
+  let postfachService: Mock<PostfachService>;
+
   const attachmentIcon: string = getDataTestIdOf('postfach-nachricht-attachment-icon');
   const postfachEditButton: string = getDataTestIdOf('postfach-nachricht-edit-button-container');
   const postfachOutgoingNachrichtDate: string = getDataTestIdOf('postfach-outgoing-nachricht-date');
@@ -55,6 +58,7 @@ describe('OutgoingMailComponent', () => {
   const routing: string = getDataTestClassOf('outgoing-mail-routing');
 
   beforeEach(async () => {
+    postfachService = mock(PostfachService);
     await TestBed.configureTestingModule({
       declarations: [
         OutgoingMailComponent,
@@ -66,13 +70,15 @@ describe('OutgoingMailComponent', () => {
         MockComponent(PostfachMailDateComponent),
         MockComponent(PostfachNachrichtEditButtonContainerComponent),
       ],
-      imports: [RouterModule],
       providers: [
-        provideRouter([]),
         {
           provide: ON_PAGE,
           useValue: undefined,
         },
+        {
+          provide: PostfachService,
+          useValue: postfachService,
+        },
       ],
     }).compileComponents();
   });
@@ -88,125 +94,125 @@ describe('OutgoingMailComponent', () => {
     expect(component).toBeTruthy();
   });
 
-  describe('attachments', () => {
-    it('should only show attachment icon on detail', () => {
-      component.onPage = false;
-      component.postfachMail = createPostfachMailResource([PostfachMailLinkRel.ATTACHMENTS]);
-      fixture.detectChanges();
+  describe('template', () => {
+    describe('attachments', () => {
+      it('should only show attachment icon on detail', () => {
+        component.onPage = false;
+        component.postfachMail = createPostfachMailResource([PostfachMailLinkRel.ATTACHMENTS]);
+        fixture.detectChanges();
 
-      const element = getElementFromFixture(fixture, attachmentIcon);
+        const element = getElementFromFixture(fixture, attachmentIcon);
 
-      expect(element).toBeInstanceOf(HTMLElement);
+        expect(element).toBeInstanceOf(HTMLElement);
+      });
     });
-  });
 
-  describe('edit button container component', () => {
-    const postfachNachricht: PostfachMailResource = createPostfachMailResource([PostfachMailLinkRel.EDIT]);
+    describe('edit button container component', () => {
+      const postfachNachricht: PostfachMailResource = createPostfachMailResource([PostfachMailLinkRel.EDIT]);
 
-    describe('on existing edit link', () => {
-      beforeEach(() => {
-        component.postfachMail = postfachNachricht;
+      describe('on existing edit link', () => {
+        beforeEach(() => {
+          component.postfachMail = postfachNachricht;
+        });
+
+        it('should be visbile', () => {
+          fixture.detectChanges();
+
+          existsAsHtmlElement(fixture, postfachEditButton);
+        });
+
+        it('should be called with postfachNachricht', () => {
+          fixture.detectChanges();
+
+          const editButtonComponent: PostfachNachrichtEditButtonContainerComponent = getMockComponent(
+            fixture,
+            PostfachNachrichtEditButtonContainerComponent,
+          );
+          expect(editButtonComponent.postfachNachricht).toBe(postfachNachricht);
+        });
+
+        it('should be called with vorgangStateResource', () => {
+          const vorgangStateResource: StateResource<VorgangWithEingangResource> = createStateResource(
+            createVorgangWithEingangResource(),
+          );
+          component.vorgangStateResource = vorgangStateResource;
+
+          fixture.detectChanges();
+
+          const editButtonComponent: PostfachNachrichtEditButtonContainerComponent = getMockComponent(
+            fixture,
+            PostfachNachrichtEditButtonContainerComponent,
+          );
+          expect(editButtonComponent.vorgangStateResource).toBe(vorgangStateResource);
+        });
       });
 
-      it('should be visbile', () => {
-        fixture.detectChanges();
+      describe('on missing edit link', () => {
+        const postfachNachricht: PostfachMailResource = createPostfachMailResource();
 
-        existsAsHtmlElement(fixture, postfachEditButton);
-      });
+        beforeEach(() => {
+          component.postfachMail = postfachNachricht;
+        });
 
-      it('should be called with postfachNachricht', () => {
-        fixture.detectChanges();
+        it('should not be visible', () => {
+          fixture.detectChanges();
 
-        const editButtonComponent: PostfachNachrichtEditButtonContainerComponent = getMockComponent(
-          fixture,
-          PostfachNachrichtEditButtonContainerComponent,
-        );
-        expect(editButtonComponent.postfachNachricht).toBe(postfachNachricht);
+          notExistsAsHtmlElement(fixture, postfachEditButton);
+        });
       });
 
-      it('should be called with vorgangStateResource', () => {
-        const vorgangStateResource: StateResource<VorgangWithEingangResource> = createStateResource(
-          createVorgangWithEingangResource(),
-        );
-        component.vorgangStateResource = vorgangStateResource;
+      describe('in detail context', () => {
+        const postfachNachricht: PostfachMailResource = createPostfachMailResource([PostfachMailLinkRel.EDIT]);
 
-        fixture.detectChanges();
+        beforeEach(() => {
+          component.onPage = true;
+          component.postfachMail = postfachNachricht;
+        });
+
+        it('should not be visible', () => {
+          fixture.detectChanges();
 
-        const editButtonComponent: PostfachNachrichtEditButtonContainerComponent = getMockComponent(
-          fixture,
-          PostfachNachrichtEditButtonContainerComponent,
-        );
-        expect(editButtonComponent.vorgangStateResource).toBe(vorgangStateResource);
+          notExistsAsHtmlElement(fixture, postfachEditButton);
+        });
       });
     });
 
-    describe('on missing edit link', () => {
-      const postfachNachricht: PostfachMailResource = createPostfachMailResource();
+    describe('date', () => {
+      it('should be visible if exists', () => {
+        component.postfachMail = createPostfachMailResource();
 
-      beforeEach(() => {
-        component.postfachMail = postfachNachricht;
-      });
-
-      it('should not be visible', () => {
         fixture.detectChanges();
 
-        notExistsAsHtmlElement(fixture, postfachEditButton);
+        existsAsHtmlElement(fixture, postfachOutgoingNachrichtDate);
       });
-    });
 
-    describe('in detail context', () => {
-      const postfachNachricht: PostfachMailResource = createPostfachMailResource([PostfachMailLinkRel.EDIT]);
-
-      beforeEach(() => {
-        component.onPage = true;
-        component.postfachMail = postfachNachricht;
-      });
+      it('should not be visible if not exists', () => {
+        component.postfachMail = { ...createPostfachMailResource(), sentAt: null };
 
-      it('should not be visible', () => {
         fixture.detectChanges();
 
-        notExistsAsHtmlElement(fixture, postfachEditButton);
+        notExistsAsHtmlElement(fixture, postfachOutgoingNachrichtDate);
       });
     });
-  });
-
-  describe('date', () => {
-    it('should be visible if exists', () => {
-      component.postfachMail = createPostfachMailResource();
-
-      fixture.detectChanges();
-
-      existsAsHtmlElement(fixture, postfachOutgoingNachrichtDate);
-    });
 
-    it('should not be visible if not exists', () => {
-      component.postfachMail = { ...createPostfachMailResource(), sentAt: null };
+    describe('link', () => {
+      it('should navigate to postfach  click', () => {
+        component.navigateToPostfach = jest.fn();
 
-      fixture.detectChanges();
+        dispatchEventFromFixture(fixture, routing, 'click');
 
-      notExistsAsHtmlElement(fixture, postfachOutgoingNachrichtDate);
+        expect(component.navigateToPostfach).toHaveBeenCalled();
+      });
     });
   });
 
-  describe('routing should be', () => {
-    it('null on page site', () => {
-      component.onPage = false;
-
-      fixture.detectChanges();
-
-      const routerElement = getDebugElementFromFixtureByCss(fixture, routing);
-      const routerLinkInstance: RouterLinkWithHref = routerElement.injector.get(RouterLinkWithHref);
-      expect((<any>routerLinkInstance).routerLinkInput[0]).toEqual('postfach');
-    });
+  describe('component', () => {
+    describe('navigate to postfach', () => {
+      it('should call postfachService', () => {
+        component.navigateToPostfach();
 
-    it('"postfach" on detail site', () => {
-      component.onPage = true;
-
-      fixture.detectChanges();
-
-      const routerElement = getDebugElementFromFixtureByCss(fixture, routing);
-      const routerLinkInstance: RouterLinkWithHref = routerElement.injector.get(RouterLinkWithHref);
-      expect((<any>routerLinkInstance).routerLinkInput).toBeNull();
+        expect(postfachService.navigateToPostfach).toHaveBeenCalled();
+      });
     });
   });
 });
diff --git a/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/postfach-mail/outgoing-mail/outgoing-mail.component.ts b/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/postfach-mail/outgoing-mail/outgoing-mail.component.ts
index 36a1250f9a9eadfc80bca7917a70cae655bd46a9..61e9be8687e78514359cba117bd99291df075a21 100644
--- a/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/postfach-mail/outgoing-mail/outgoing-mail.component.ts
+++ b/alfa-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/postfach-mail/outgoing-mail/outgoing-mail.component.ts
@@ -21,10 +21,10 @@
  * Die sprachspezifischen Genehmigungen und Beschränkungen
  * unter der Lizenz sind dem Lizenztext zu entnehmen.
  */
-import { ON_PAGE, PostfachMailLinkRel, PostfachMailResource } from '@alfa-client/postfach-shared';
+import { ON_PAGE, PostfachMailLinkRel, PostfachMailResource, PostfachService } from '@alfa-client/postfach-shared';
 import { StateResource } from '@alfa-client/tech-shared';
 import { VorgangWithEingangResource } from '@alfa-client/vorgang-shared';
-import { Component, Inject, Input } from '@angular/core';
+import { Component, inject, Inject, Input } from '@angular/core';
 
 @Component({
   selector: 'alfa-outgoing-mail',
@@ -32,10 +32,16 @@ import { Component, Inject, Input } from '@angular/core';
   styleUrls: ['./outgoing-mail.component.scss'],
 })
 export class OutgoingMailComponent {
+  public readonly postfachService = inject(PostfachService);
+
   @Input() postfachMail: PostfachMailResource;
   @Input() vorgangStateResource: StateResource<VorgangWithEingangResource>;
 
   readonly postfachNachrichtLinkRel = PostfachMailLinkRel;
 
   constructor(@Inject(ON_PAGE) public onPage: boolean) {}
+
+  public navigateToPostfach(): void {
+    this.postfachService.navigateToPostfach();
+  }
 }
diff --git a/alfa-client/libs/postfach/src/lib/postfach-page-container/postfach-page/mail-unread-button/mail-unread-button-link-container.component.html b/alfa-client/libs/postfach/src/lib/postfach-page-container/postfach-page/mail-unread-button/mail-unread-button-link-container.component.html
index a836bbda9567e3066f30ca4d1280df8787b389a6..617abb23dfe032aa974dd451cce361768a82a5a5 100644
--- a/alfa-client/libs/postfach/src/lib/postfach-page-container/postfach-page/mail-unread-button/mail-unread-button-link-container.component.html
+++ b/alfa-client/libs/postfach/src/lib/postfach-page-container/postfach-page/mail-unread-button/mail-unread-button-link-container.component.html
@@ -1,30 +1,26 @@
 @if (postfachMailListStateResource.resource | hasLink: PostfachMailListLinkRel.SET_HAS_NEW_POSTFACH_NACHRICHT) {
   @if (showAsIconButton) {
-    <a [routerLink]="'../'" tabindex="-1">
-      <ods-button
-        (clickEmitter)="markMailAsUnread()"
-        [tooltip]="'Nachrichten als ungelesen markieren'"
-        tooltipAriaType="aria-labelledby"
-        variant="ghost"
-        size="fit"
-        dataTestId="mail-unread-icon-button-link"
-        data-test-id="mail-unread-icon-button-link-host"
-      >
-        <ods-mail-unread-icon icon />
-      </ods-button>
-    </a>
+    <ods-button
+      (clickEmitter)="markMailAsUnread()"
+      [tooltip]="'Nachrichten als ungelesen markieren'"
+      tooltipAriaType="aria-labelledby"
+      variant="ghost"
+      size="fit"
+      dataTestId="mail-unread-icon-button-link"
+      data-test-id="mail-unread-icon-button-link-host"
+    >
+      <ods-mail-unread-icon icon />
+    </ods-button>
   } @else {
-    <a [routerLink]="'../'" tabindex="-1">
-      <ods-button
-        (clickEmitter)="markMailAsUnread()"
-        [tooltip]="'Nachrichten als ungelesen markieren'"
-        text="Als ungelesen markieren"
-        variant="outline"
-        dataTestId="mail-unread-button-link"
-        data-test-id="mail-unread-button-link-host"
-      >
-        <ods-mail-unread-icon icon class="fill-primary"/>
-      </ods-button>
-    </a>
+    <ods-button
+      (clickEmitter)="markMailAsUnread()"
+      [tooltip]="'Nachrichten als ungelesen markieren'"
+      text="Als ungelesen markieren"
+      variant="outline"
+      dataTestId="mail-unread-button-link"
+      data-test-id="mail-unread-button-link-host"
+    >
+      <ods-mail-unread-icon icon class="fill-primary" />
+    </ods-button>
   }
 }
diff --git a/alfa-client/libs/postfach/src/lib/postfach-page-container/postfach-page/mail-unread-button/mail-unread-button-link-container.component.spec.ts b/alfa-client/libs/postfach/src/lib/postfach-page-container/postfach-page/mail-unread-button/mail-unread-button-link-container.component.spec.ts
index 37d5c2efd99a21a8c73ec7e87ea336d367b12268..2cdf6d0ed466f56b746675cf951907010991f36b 100644
--- a/alfa-client/libs/postfach/src/lib/postfach-page-container/postfach-page/mail-unread-button/mail-unread-button-link-container.component.spec.ts
+++ b/alfa-client/libs/postfach/src/lib/postfach-page-container/postfach-page/mail-unread-button/mail-unread-button-link-container.component.spec.ts
@@ -9,7 +9,6 @@ import {
   notExistsAsHtmlElement,
 } from '@alfa-client/test-utils';
 import { ComponentFixture, TestBed } from '@angular/core/testing';
-import { RouterModule } from '@angular/router';
 import { ButtonComponent, MailUnreadIconComponent } from '@ods/system';
 import { MockComponent } from 'ng-mocks';
 import { createPostfachMailListResource } from '../../../../../../postfach-shared/test/postfach';
@@ -33,7 +32,7 @@ describe('MailUnreadButtonLinkContainerComponent', () => {
     postfachService = mock(PostfachService);
 
     await TestBed.configureTestingModule({
-      imports: [MailUnreadButtonLinkContainerComponent, HasLinkPipe, RouterModule.forRoot([])],
+      imports: [MailUnreadButtonLinkContainerComponent, HasLinkPipe],
       declarations: [MockComponent(ButtonComponent), MockComponent(MailUnreadIconComponent)],
       providers: [
         {
diff --git a/alfa-client/libs/postfach/src/lib/postfach-page-container/postfach-page/mail-unread-button/mail-unread-button-link-container.component.ts b/alfa-client/libs/postfach/src/lib/postfach-page-container/postfach-page/mail-unread-button/mail-unread-button-link-container.component.ts
index 678e0beb0db2f43ff86c5a57d8f30b8cae0dd370..375e450d81f979eab07cbdf1a3c9f93d820addc0 100644
--- a/alfa-client/libs/postfach/src/lib/postfach-page-container/postfach-page/mail-unread-button/mail-unread-button-link-container.component.ts
+++ b/alfa-client/libs/postfach/src/lib/postfach-page-container/postfach-page/mail-unread-button/mail-unread-button-link-container.component.ts
@@ -2,14 +2,13 @@ import { CommandResource } from '@alfa-client/command-shared';
 import { PostfachMailListLinkRel, PostfachMailListResource, PostfachService } from '@alfa-client/postfach-shared';
 import { createEmptyStateResource, HasLinkPipe, StateResource } from '@alfa-client/tech-shared';
 import { Component, inject, Input } from '@angular/core';
-import { RouterLink } from '@angular/router';
 import { ButtonComponent, MailUnreadIconComponent, TooltipDirective } from '@ods/system';
 import { Observable, of } from 'rxjs';
 
 @Component({
   selector: 'alfa-mail-unread-button-link-container',
   standalone: true,
-  imports: [HasLinkPipe, MailUnreadIconComponent, TooltipDirective, ButtonComponent, RouterLink],
+  imports: [HasLinkPipe, MailUnreadIconComponent, TooltipDirective, ButtonComponent],
   templateUrl: './mail-unread-button-link-container.component.html',
 })
 export class MailUnreadButtonLinkContainerComponent {
diff --git a/alfa-client/libs/vorgang-shared/src/lib/vorgang-navigation.util.ts b/alfa-client/libs/vorgang-shared/src/lib/vorgang-navigation.util.ts
index 053d9eb1c84a2b396d86b45fbf8908b4790f76a9..31e236a31c13420adf23b3b391b2ef6a3a09e3ab 100644
--- a/alfa-client/libs/vorgang-shared/src/lib/vorgang-navigation.util.ts
+++ b/alfa-client/libs/vorgang-shared/src/lib/vorgang-navigation.util.ts
@@ -231,6 +231,10 @@ function hasVorgangParam(routeData: RouteData): boolean {
   return isNotNull(routeData.queryParameter[VORGANG_WITH_EINGANG_ROUTE_PARAM]);
 }
 
+export function getVorgangParam(routeData: RouteData): string {
+  return routeData.queryParameter[VORGANG_WITH_EINGANG_ROUTE_PARAM];
+}
+
 function hasSegements(routeData: RouteData, numberOfSegements: number): boolean {
   return routeData.urlSegments.length === numberOfSegements;
 }