diff --git a/frontend/src/components/email/ContractEmailsSection.tsx b/frontend/src/components/email/ContractEmailsSection.tsx
index faf12c49..d0af7255 100644
--- a/frontend/src/components/email/ContractEmailsSection.tsx
+++ b/frontend/src/components/email/ContractEmailsSection.tsx
@@ -1,5 +1,6 @@
 import { useState, useEffect } from 'react';
-import { Mail, MailOpen, Star, Paperclip, Plus, X, ChevronRight, Inbox, Send, RefreshCw, Trash2 } from 'lucide-react';
+import { Link } from 'react-router-dom';
+import { Mail, MailOpen, Star, Paperclip, Plus, X, ChevronRight, Inbox, Send, RefreshCw, Trash2, ExternalLink } from 'lucide-react';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { cachedEmailApi, stressfreiEmailApi, CachedEmail } from '../../services/api';
 import { useAuth } from '../../context/AuthContext';
@@ -285,8 +286,18 @@ export default function ContractEmailsSection({
   return (
     <Card
       title={
-        <div className="flex items-center gap-4">
+        <div className="flex items-center gap-3">
           <span>E-Mails</span>
+          <Link
+            to={`/customers/${customerId}?tab=emails`}
+            target="_blank"
+            rel="noopener noreferrer"
+            className="inline-flex items-center gap-1 text-xs text-blue-600 hover:text-blue-800 hover:underline font-normal"
+            title="Komplettes E-Mail-Postfach des Kunden in neuem Tab öffnen"
+          >
+            <ExternalLink className="w-3 h-3" />
+            Postfach öffnen
+          </Link>
         </div>
       }
       actions={