diff --git a/paperless-backend/src/app.module.ts b/paperless-backend/src/app.module.ts
index b988881..da8b64f 100644
--- a/paperless-backend/src/app.module.ts
+++ b/paperless-backend/src/app.module.ts
@@ -16,6 +16,7 @@ import { KontonummernModule } from './kontonummern/kontonummern.module';
 import { StatsModule } from './stats/stats.module';
 import { BarcodeModule } from './barcode/barcode.module';
 import { InboxPostprocessorModule } from './inbox-postprocessor/inbox-postprocessor.module';
+import { UserSettingsModule } from './user-settings/user-settings.module';
 import * as path from 'path';
 
 @Module({
@@ -43,6 +44,7 @@ import * as path from 'path';
     StatsModule,
     BarcodeModule,
     InboxPostprocessorModule,
+    UserSettingsModule,
   ],
 })
 export class AppModule {}
diff --git a/paperless-backend/src/database/database.module.ts b/paperless-backend/src/database/database.module.ts
index 73cd8c6..10862d6 100644
--- a/paperless-backend/src/database/database.module.ts
+++ b/paperless-backend/src/database/database.module.ts
@@ -23,6 +23,7 @@ import {
   InboxDocument,
   InboxPostprocessingAction,
   CorrespondentEmailMapping,
+  UserSettings,
 } from './entities';
 
 const entities = [
@@ -47,6 +48,7 @@ const entities = [
   InboxDocument,
   InboxPostprocessingAction,
   CorrespondentEmailMapping,
+  UserSettings,
 ];
 
 @Module({
diff --git a/paperless-backend/src/database/entities/index.ts b/paperless-backend/src/database/entities/index.ts
index 8051dbc..31b738b 100644
--- a/paperless-backend/src/database/entities/index.ts
+++ b/paperless-backend/src/database/entities/index.ts
@@ -19,3 +19,4 @@ export { BarcodeTemplate } from './barcode-template.entity';
 export { InboxDocument } from './inbox-document.entity';
 export { InboxPostprocessingAction } from './inbox-postprocessing-action.entity';
 export { CorrespondentEmailMapping } from './correspondent-email-mapping.entity';
+export { UserSettings } from './user-settings.entity';
diff --git a/paperless-backend/src/database/entities/user-settings.entity.ts b/paperless-backend/src/database/entities/user-settings.entity.ts
new file mode 100644
index 0000000..2359758
--- /dev/null
+++ b/paperless-backend/src/database/entities/user-settings.entity.ts
@@ -0,0 +1,28 @@
+import { Entity, PrimaryColumn, Column } from 'typeorm';
+
+@Entity('user_settings')
+export class UserSettings {
+  @PrimaryColumn({ type: 'varchar', length: 255 })
+  UserId!: string;
+
+  @Column({ type: 'varchar', length: 255, nullable: true })
+  SmtpHost!: string | null;
+
+  @Column({ type: 'int', nullable: true })
+  SmtpPort!: number | null;
+
+  @Column({ type: 'boolean', default: false })
+  SmtpSecure!: boolean;
+
+  @Column({ type: 'varchar', length: 255, nullable: true })
+  SmtpUser!: string | null;
+
+  @Column({ type: 'varchar', length: 255, nullable: true })
+  SmtpPass!: string | null;
+
+  @Column({ type: 'varchar', length: 255, nullable: true })
+  SmtpFrom!: string | null;
+
+  @Column({ type: 'text', nullable: true })
+  MailSignatureHtml!: string | null;
+}
diff --git a/paperless-backend/src/inbox/inbox.controller.ts b/paperless-backend/src/inbox/inbox.controller.ts
index 068989e..ae0be74 100644
--- a/paperless-backend/src/inbox/inbox.controller.ts
+++ b/paperless-backend/src/inbox/inbox.controller.ts
@@ -18,6 +18,7 @@ import { createReadStream } from 'fs';
 import { InboxService } from './inbox.service';
 import { InboxPostprocessorService } from '../inbox-postprocessor/inbox-postprocessor.service';
 import { BarcodeScannerService } from '../barcode/barcode-scanner.service';
+import { UserSettingsService } from '../user-settings/user-settings.service';
 import { RequirePermissions } from '../auth/permissions.decorator';
 import { Permission } from '../auth/permissions.enum';
 
@@ -28,6 +29,7 @@ export class InboxController {
     private readonly inboxService: InboxService,
     private readonly postprocessor: InboxPostprocessorService,
     private readonly barcodeScanner: BarcodeScannerService,
+    private readonly userSettingsService: UserSettingsService,
   ) {}
 
   @Get()
@@ -205,6 +207,10 @@ export class InboxController {
     @Request() req: any,
   ): Promise<void> {
     const preferredUsername: string | null = req.user?.preferredUsername ?? null;
-    await this.inboxService.sendAsEmail(id, preferredUsername, body);
+    const smtpOverride = await this.userSettingsService.getSmtpConfig(req.user.userId);
+    await this.inboxService.sendAsEmail(id, preferredUsername, {
+      ...body,
+      smtpOverride: smtpOverride ?? undefined,
+    });
   }
 }
diff --git a/paperless-backend/src/inbox/inbox.module.ts b/paperless-backend/src/inbox/inbox.module.ts
index edbd62c..24a9516 100644
--- a/paperless-backend/src/inbox/inbox.module.ts
+++ b/paperless-backend/src/inbox/inbox.module.ts
@@ -10,6 +10,7 @@ import { InboxMigrationService } from './inbox-migration.service';
 import { BarcodeModule } from '../barcode/barcode.module';
 import { InboxPostprocessorModule } from '../inbox-postprocessor/inbox-postprocessor.module';
 import { PostprocessingModule } from '../postprocessing/postprocessing.module';
+import { UserSettingsModule } from '../user-settings/user-settings.module';
 
 @Module({
   imports: [
@@ -17,6 +18,7 @@ import { PostprocessingModule } from '../postprocessing/postprocessing.module';
     BarcodeModule,
     InboxPostprocessorModule,
     PostprocessingModule,
+    UserSettingsModule,
   ],
   controllers: [InboxController, ClientsController],
   providers: [InboxService, InboxMigrationService],
diff --git a/paperless-backend/src/inbox/inbox.service.ts b/paperless-backend/src/inbox/inbox.service.ts
index 2e6b63c..6cb23c9 100644
--- a/paperless-backend/src/inbox/inbox.service.ts
+++ b/paperless-backend/src/inbox/inbox.service.ts
@@ -274,6 +274,7 @@ export class InboxService {
       body: string;
       html?: string;
       segments: { pages: number[]; filename: string }[];
+      smtpOverride?: { host: string; port: number; secure: boolean; user: string; pass: string; from: string };
     },
   ): Promise<void> {
     const { doc, pdfPath } = await this.resolveDocument(id, preferredUsername);
@@ -294,6 +295,7 @@ export class InboxService {
       body: opts.body,
       html: opts.html,
       attachments,
+      smtpOverride: opts.smtpOverride,
     });
   }
 }
diff --git a/paperless-backend/src/postprocessing/mail.service.ts b/paperless-backend/src/postprocessing/mail.service.ts
index d04f701..4b897e8 100644
--- a/paperless-backend/src/postprocessing/mail.service.ts
+++ b/paperless-backend/src/postprocessing/mail.service.ts
@@ -25,10 +25,27 @@ export class MailService {
     body: string;
     html?: string;
     attachments?: { filename: string; content: Buffer }[];
+    smtpOverride?: { host: string; port: number; secure: boolean; user: string; pass: string; from: string };
   }): Promise<void> {
-    const from = this.configService.get<string>('SMTP_FROM', 'paperless@localhost');
+    let transporter = this.transporter;
+    let from = this.configService.get<string>('SMTP_FROM', 'paperless@localhost');
 
-    await this.transporter.sendMail({
+    if (options.smtpOverride) {
+      const o = options.smtpOverride;
+      transporter = nodemailer.createTransport({
+        host: o.host,
+        port: o.port,
+        secure: o.secure,
+        auth: { user: o.user, pass: o.pass },
+      });
+      from = o.from || from;
+    } else {
+      this.logger.debug(
+        `SMTP config — host: ${this.configService.get('SMTP_HOST')} port: ${this.configService.get('SMTP_PORT')} secure: ${this.configService.get('SMTP_SECURE')} user: ${this.configService.get('SMTP_USER')} from: ${from}`,
+      );
+    }
+
+    const info = await transporter.sendMail({
       from,
       to: options.to,
       subject: options.subject,
@@ -40,6 +57,8 @@ export class MailService {
       })),
     });
 
-    this.logger.log(`Mail gesendet an ${options.to}: "${options.subject}"`);
+    this.logger.log(
+      `Mail gesendet an ${options.to}: "${options.subject}" — messageId: ${info.messageId} accepted: ${JSON.stringify(info.accepted)} rejected: ${JSON.stringify(info.rejected)} response: ${info.response}`,
+    );
   }
 }
diff --git a/paperless-backend/src/user-settings/user-settings.controller.ts b/paperless-backend/src/user-settings/user-settings.controller.ts
new file mode 100644
index 0000000..e65e732
--- /dev/null
+++ b/paperless-backend/src/user-settings/user-settings.controller.ts
@@ -0,0 +1,23 @@
+import { Body, Controller, Get, HttpCode, Post, Put, Request } from '@nestjs/common';
+import { UserSettingsService } from './user-settings.service';
+
+@Controller('api/user-settings')
+export class UserSettingsController {
+  constructor(private readonly userSettingsService: UserSettingsService) {}
+
+  @Get()
+  async getSettings(@Request() req: any) {
+    return this.userSettingsService.getSettings(req.user.userId);
+  }
+
+  @Put()
+  async updateSettings(@Request() req: any, @Body() body: any) {
+    return this.userSettingsService.updateSettings(req.user.userId, body);
+  }
+
+  @Post('test-smtp')
+  @HttpCode(200)
+  async testSmtp(@Body() body: { host: string; port: number; secure: boolean; user: string; pass: string }) {
+    return this.userSettingsService.testSmtp(body);
+  }
+}
diff --git a/paperless-backend/src/user-settings/user-settings.module.ts b/paperless-backend/src/user-settings/user-settings.module.ts
new file mode 100644
index 0000000..c450bac
--- /dev/null
+++ b/paperless-backend/src/user-settings/user-settings.module.ts
@@ -0,0 +1,13 @@
+import { Module } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { UserSettings } from '../database/entities/user-settings.entity';
+import { UserSettingsService } from './user-settings.service';
+import { UserSettingsController } from './user-settings.controller';
+
+@Module({
+  imports: [TypeOrmModule.forFeature([UserSettings])],
+  providers: [UserSettingsService],
+  controllers: [UserSettingsController],
+  exports: [UserSettingsService],
+})
+export class UserSettingsModule {}
diff --git a/paperless-backend/src/user-settings/user-settings.service.ts b/paperless-backend/src/user-settings/user-settings.service.ts
new file mode 100644
index 0000000..3f5800e
--- /dev/null
+++ b/paperless-backend/src/user-settings/user-settings.service.ts
@@ -0,0 +1,107 @@
+import { Injectable } from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { Repository } from 'typeorm';
+import * as nodemailer from 'nodemailer';
+import { UserSettings } from '../database/entities/user-settings.entity';
+
+export interface UserSettingsDto {
+  smtpHost: string | null;
+  smtpPort: number | null;
+  smtpSecure: boolean;
+  smtpUser: string | null;
+  smtpPassSet: boolean;
+  smtpFrom: string | null;
+  mailSignatureHtml: string | null;
+}
+
+@Injectable()
+export class UserSettingsService {
+  constructor(
+    @InjectRepository(UserSettings)
+    private readonly repo: Repository<UserSettings>,
+  ) {}
+
+  async getSettings(userId: string): Promise<UserSettingsDto> {
+    const entity = await this.repo.findOne({ where: { UserId: userId } });
+    return this.toDto(entity);
+  }
+
+  async updateSettings(
+    userId: string,
+    data: {
+      smtpHost?: string | null;
+      smtpPort?: number | null;
+      smtpSecure?: boolean;
+      smtpUser?: string | null;
+      smtpPass?: string | null;
+      smtpFrom?: string | null;
+      mailSignatureHtml?: string | null;
+    },
+  ): Promise<UserSettingsDto> {
+    let entity = await this.repo.findOne({ where: { UserId: userId } });
+    if (!entity) {
+      entity = this.repo.create({ UserId: userId });
+    }
+
+    if (data.smtpHost !== undefined) entity.SmtpHost = data.smtpHost;
+    if (data.smtpPort !== undefined) entity.SmtpPort = data.smtpPort;
+    if (data.smtpSecure !== undefined) entity.SmtpSecure = data.smtpSecure;
+    if (data.smtpUser !== undefined) entity.SmtpUser = data.smtpUser;
+    if (data.smtpPass !== undefined && data.smtpPass !== null && data.smtpPass !== '') {
+      entity.SmtpPass = data.smtpPass;
+    }
+    if (data.smtpFrom !== undefined) entity.SmtpFrom = data.smtpFrom;
+    if (data.mailSignatureHtml !== undefined) entity.MailSignatureHtml = data.mailSignatureHtml;
+
+    await this.repo.save(entity);
+    return this.toDto(entity);
+  }
+
+  async testSmtp(config: {
+    host: string;
+    port: number;
+    secure: boolean;
+    user: string;
+    pass: string;
+  }): Promise<{ ok: boolean; error?: string }> {
+    const transporter = nodemailer.createTransport({
+      host: config.host,
+      port: config.port,
+      secure: config.secure,
+      auth: { user: config.user, pass: config.pass },
+    });
+    try {
+      await transporter.verify();
+      return { ok: true };
+    } catch (err: any) {
+      return { ok: false, error: err.message };
+    }
+  }
+
+  async getSmtpConfig(userId: string): Promise<{
+    host: string; port: number; secure: boolean; user: string; pass: string; from: string;
+  } | null> {
+    const entity = await this.repo.findOne({ where: { UserId: userId } });
+    if (!entity?.SmtpHost || !entity?.SmtpPass) return null;
+    return {
+      host: entity.SmtpHost,
+      port: entity.SmtpPort ?? 587,
+      secure: entity.SmtpSecure,
+      user: entity.SmtpUser ?? '',
+      pass: entity.SmtpPass,
+      from: entity.SmtpFrom ?? entity.SmtpUser ?? '',
+    };
+  }
+
+  private toDto(entity: UserSettings | null): UserSettingsDto {
+    return {
+      smtpHost: entity?.SmtpHost ?? null,
+      smtpPort: entity?.SmtpPort ?? null,
+      smtpSecure: entity?.SmtpSecure ?? false,
+      smtpUser: entity?.SmtpUser ?? null,
+      smtpPassSet: !!(entity?.SmtpPass),
+      smtpFrom: entity?.SmtpFrom ?? null,
+      mailSignatureHtml: entity?.MailSignatureHtml ?? null,
+    };
+  }
+}
diff --git a/paperless-frontend/src/App.tsx b/paperless-frontend/src/App.tsx
index 4a45ddc..19bf781 100644
--- a/paperless-frontend/src/App.tsx
+++ b/paperless-frontend/src/App.tsx
@@ -13,6 +13,7 @@ import ManuellBearbeitenPage from './pages/ManuellBearbeitenPage';
 import MailpostfachPage from './pages/MailpostfachPage';
 import MailDetailPage from './pages/MailDetailPage';
 import SettingsPage from './pages/SettingsPage';
+import UserSettingsPage from './pages/UserSettingsPage';
 import LoginPage from './pages/LoginPage';
 import DashboardPage from './pages/DashboardPage';
 import { Spin, Result, Button } from 'antd';
@@ -127,6 +128,7 @@ function ThemedApp() {
               <Route path="/mailpostfach" element={<PermissionRoute permission={Permission.VIEW_MAIL}><MailpostfachPage /></PermissionRoute>} />
               <Route path="/mailpostfach/:id" element={<PermissionRoute permission={Permission.VIEW_MAIL}><MailDetailPage /></PermissionRoute>} />
               <Route path="/settings" element={<PermissionRoute permission={Permission.MANAGE_SETTINGS}><SettingsPage /></PermissionRoute>} />
+              <Route path="/user-settings" element={<UserSettingsPage />} />
             </Route>
           </Routes>
           </BrowserRouter>
diff --git a/paperless-frontend/src/api/userSettings.ts b/paperless-frontend/src/api/userSettings.ts
new file mode 100644
index 0000000..5d51bcd
--- /dev/null
+++ b/paperless-frontend/src/api/userSettings.ts
@@ -0,0 +1,23 @@
+import api from './client';
+
+export interface UserSettingsData {
+  smtpHost: string | null;
+  smtpPort: number | null;
+  smtpSecure: boolean;
+  smtpUser: string | null;
+  smtpPassSet: boolean;
+  smtpFrom: string | null;
+  mailSignatureHtml: string | null;
+}
+
+export const userSettingsApi = {
+  get: () => api.get<UserSettingsData>('/api/user-settings').then((r) => r.data),
+
+  update: (data: Partial<UserSettingsData> & { smtpPass?: string }) =>
+    api.put<UserSettingsData>('/api/user-settings', data).then((r) => r.data),
+
+  testSmtp: (cfg: { host: string; port: number; secure: boolean; user: string; pass: string }) =>
+    api
+      .post<{ ok: boolean; error?: string }>('/api/user-settings/test-smtp', cfg)
+      .then((r) => r.data),
+};
diff --git a/paperless-frontend/src/layouts/AppLayout.tsx b/paperless-frontend/src/layouts/AppLayout.tsx
index e90e9a9..802d64b 100644
--- a/paperless-frontend/src/layouts/AppLayout.tsx
+++ b/paperless-frontend/src/layouts/AppLayout.tsx
@@ -204,6 +204,12 @@ export default function AppLayout() {
           <Dropdown
             menu={{
               items: [
+                {
+                  key: 'user-settings',
+                  icon: <SettingOutlined />,
+                  label: 'Benutzereinstellungen',
+                  onClick: () => navigate('/user-settings'),
+                },
                 {
                   key: 'logout',
                   icon: <LogoutOutlined />,
diff --git a/paperless-frontend/src/pages/InboxDetailPage.tsx b/paperless-frontend/src/pages/InboxDetailPage.tsx
index bb7f89c..edeb024 100644
--- a/paperless-frontend/src/pages/InboxDetailPage.tsx
+++ b/paperless-frontend/src/pages/InboxDetailPage.tsx
@@ -26,6 +26,7 @@ import StarterKit from '@tiptap/starter-kit';
 import Underline from '@tiptap/extension-underline';
 import { inboxApi, type InboxBarcode, type InboxFile, type PostprocessActionResult } from '../api/inbox';
 import { paperlessApi } from '../api/paperless';
+import { userSettingsApi } from '../api/userSettings';
 
 const ZOOM_MIN = 0.5;
 const ZOOM_MAX = 3;
@@ -678,13 +679,17 @@ function SendEmailDialog({ open, fileId, fileName, documents, onClose }: SendEma
   useEffect(() => {
     if (!open) return;
     form.resetFields();
-    editor?.commands.clearContent();
     const base = fileName.replace(/\.pdf$/i, '');
     setFilenames(
       documents.map((doc) =>
         doc.belegname || (documents.length === 1 ? base : `${base}_${doc.index + 1}`),
       ),
     );
+    userSettingsApi.get().then((settings) => {
+      editor?.commands.setContent(settings.mailSignatureHtml ?? '');
+    }).catch(() => {
+      editor?.commands.clearContent();
+    });
   }, [open, documents, fileName, form, editor]);
 
   const handleOk = async () => {
diff --git a/paperless-frontend/src/pages/UserSettingsPage.tsx b/paperless-frontend/src/pages/UserSettingsPage.tsx
new file mode 100644
index 0000000..35c0fa9
--- /dev/null
+++ b/paperless-frontend/src/pages/UserSettingsPage.tsx
@@ -0,0 +1,185 @@
+import { useEffect, useState } from 'react';
+import { Button, Card, Form, Input, InputNumber, Space, Switch, Tabs, Typography, message } from 'antd';
+import { CheckCircleOutlined, CloseCircleOutlined, LoadingOutlined } from '@ant-design/icons';
+import { useEditor, EditorContent } from '@tiptap/react';
+import StarterKit from '@tiptap/starter-kit';
+import Underline from '@tiptap/extension-underline';
+import { userSettingsApi, type UserSettingsData } from '../api/userSettings';
+
+const { Title } = Typography;
+
+function TiptapToolbar({ editor }: { editor: ReturnType<typeof useEditor> }) {
+  if (!editor) return null;
+  const btn = (active: boolean): React.CSSProperties => ({
+    padding: '2px 8px',
+    border: '1px solid #d9d9d9',
+    borderRadius: 4,
+    cursor: 'pointer',
+    background: active ? '#e6f4ff' : '#fff',
+    fontWeight: active ? 600 : 400,
+  });
+  return (
+    <div style={{ display: 'flex', gap: 4, padding: '4px 0', borderBottom: '1px solid #f0f0f0', marginBottom: 6, flexWrap: 'wrap' }}>
+      <button style={btn(editor.isActive('bold'))} onMouseDown={(e) => { e.preventDefault(); editor.chain().focus().toggleBold().run(); }}>F</button>
+      <button style={{ ...btn(editor.isActive('italic')), fontStyle: 'italic' }} onMouseDown={(e) => { e.preventDefault(); editor.chain().focus().toggleItalic().run(); }}>K</button>
+      <button style={{ ...btn(editor.isActive('underline')), textDecoration: 'underline' }} onMouseDown={(e) => { e.preventDefault(); editor.chain().focus().toggleUnderline().run(); }}>U</button>
+      <button style={btn(editor.isActive('bulletList'))} onMouseDown={(e) => { e.preventDefault(); editor.chain().focus().toggleBulletList().run(); }}>• Liste</button>
+      <button style={btn(editor.isActive('orderedList'))} onMouseDown={(e) => { e.preventDefault(); editor.chain().focus().toggleOrderedList().run(); }}>1. Liste</button>
+    </div>
+  );
+}
+
+function MailSettingsTab() {
+  const [form] = Form.useForm();
+  const [loading, setLoading] = useState(true);
+  const [saving, setSaving] = useState(false);
+  const [testing, setTesting] = useState(false);
+  const [testResult, setTestResult] = useState<{ ok: boolean; error?: string } | null>(null);
+  const [passSet, setPassSet] = useState(false);
+
+  const editor = useEditor({
+    extensions: [StarterKit, Underline],
+    content: '',
+  });
+
+  useEffect(() => {
+    userSettingsApi.get().then((data) => {
+      form.setFieldsValue({
+        smtpHost: data.smtpHost ?? '',
+        smtpPort: data.smtpPort ?? 587,
+        smtpSecure: data.smtpSecure,
+        smtpUser: data.smtpUser ?? '',
+        smtpFrom: data.smtpFrom ?? '',
+      });
+      setPassSet(data.smtpPassSet);
+      if (data.mailSignatureHtml) {
+        editor?.commands.setContent(data.mailSignatureHtml);
+      }
+    }).catch(() => {
+      message.error('Einstellungen konnten nicht geladen werden');
+    }).finally(() => setLoading(false));
+  // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, []);
+
+  const handleSave = async () => {
+    const values = await form.validateFields();
+    setSaving(true);
+    try {
+      const updated = await userSettingsApi.update({
+        smtpHost: values.smtpHost || null,
+        smtpPort: values.smtpPort || null,
+        smtpSecure: values.smtpSecure ?? false,
+        smtpUser: values.smtpUser || null,
+        smtpPass: values.smtpPass || undefined,
+        smtpFrom: values.smtpFrom || null,
+        mailSignatureHtml: editor?.getHTML() ?? null,
+      });
+      setPassSet(updated.smtpPassSet);
+      form.setFieldValue('smtpPass', '');
+      message.success('Einstellungen gespeichert');
+    } catch {
+      message.error('Speichern fehlgeschlagen');
+    } finally {
+      setSaving(false);
+    }
+  };
+
+  const handleTest = async () => {
+    const values = form.getFieldsValue();
+    if (!values.smtpHost) { message.warning('Bitte SMTP-Server angeben'); return; }
+    setTesting(true);
+    setTestResult(null);
+    try {
+      const result = await userSettingsApi.testSmtp({
+        host: values.smtpHost,
+        port: values.smtpPort ?? 587,
+        secure: values.smtpSecure ?? false,
+        user: values.smtpUser ?? '',
+        pass: values.smtpPass || '',
+      });
+      setTestResult(result);
+    } catch {
+      setTestResult({ ok: false, error: 'Verbindung fehlgeschlagen' });
+    } finally {
+      setTesting(false);
+    }
+  };
+
+  if (loading) return null;
+
+  return (
+    <Form form={form} layout="vertical" style={{ maxWidth: 600 }}>
+      <Form.Item name="smtpHost" label="SMTP Server">
+        <Input placeholder="smtp.beispiel.de" />
+      </Form.Item>
+      <Space style={{ width: '100%' }} align="start">
+        <Form.Item name="smtpPort" label="Port" style={{ width: 120 }}>
+          <InputNumber min={1} max={65535} style={{ width: '100%' }} />
+        </Form.Item>
+        <Form.Item name="smtpSecure" label="TLS/SSL" valuePropName="checked">
+          <Switch />
+        </Form.Item>
+      </Space>
+      <Form.Item name="smtpUser" label="Benutzername">
+        <Input autoComplete="off" />
+      </Form.Item>
+      <Form.Item name="smtpPass" label="Passwort">
+        <Input.Password placeholder={passSet ? '(bereits gesetzt — leer lassen zum Beibehalten)' : ''} autoComplete="new-password" />
+      </Form.Item>
+      <Form.Item name="smtpFrom" label="Absender-Adresse (From)">
+        <Input placeholder="mein.name@beispiel.de" />
+      </Form.Item>
+
+      <Form.Item label="Signatur">
+        <div style={{ border: '1px solid #d9d9d9', borderRadius: 6, padding: '6px 10px', minHeight: 160 }}>
+          <TiptapToolbar editor={editor} />
+          <EditorContent editor={editor} style={{ minHeight: 120, outline: 'none' }} />
+        </div>
+      </Form.Item>
+
+      <Form.Item>
+        <Space>
+          <Button type="primary" loading={saving} onClick={handleSave}>
+            Speichern
+          </Button>
+          <Button
+            loading={testing}
+            icon={testing ? <LoadingOutlined /> : undefined}
+            onClick={handleTest}
+          >
+            Verbindung testen
+          </Button>
+          {testResult && (
+            <Space>
+              {testResult.ok
+                ? <CheckCircleOutlined style={{ color: '#52c41a' }} />
+                : <CloseCircleOutlined style={{ color: '#ff4d4f' }} />}
+              <Typography.Text type={testResult.ok ? 'success' : 'danger'}>
+                {testResult.ok ? 'Verbindung erfolgreich' : (testResult.error ?? 'Fehler')}
+              </Typography.Text>
+            </Space>
+          )}
+        </Space>
+      </Form.Item>
+    </Form>
+  );
+}
+
+export default function UserSettingsPage() {
+  return (
+    <div>
+      <Title level={3} style={{ marginBottom: 24 }}>Benutzereinstellungen</Title>
+      <Card>
+        <Tabs
+          items={[
+            {
+              key: 'mail',
+              label: 'Maileinstellungen',
+              children: <MailSettingsTab />,
+            },
+          ]}
+        />
+      </Card>
+    </div>
+  );
+}