diff --git a/frontend/src/tools/nachrichten.jsx b/frontend/src/tools/nachrichten.jsx
index 7f76917..70b72d4 100644
--- a/frontend/src/tools/nachrichten.jsx
+++ b/frontend/src/tools/nachrichten.jsx
@@ -43,7 +43,7 @@ export default function Nachrichten({ toast, mobile }) {
     clearInterval(pollRef.current);
     if (!activeUser) return;
     loadMessages(activeUser.id);
-    pollRef.current = setInterval(() => loadMessages(activeUser.id), 15_000);
+    pollRef.current = setInterval(() => loadMessages(activeUser.id), 10_000);
     return () => clearInterval(pollRef.current);
   }, [activeUser?.id]);
 
@@ -322,9 +322,15 @@ export default function Nachrichten({ toast, mobile }) {
                           )}
                         </div>
                         <div style={{ display:'flex', alignItems:'center', gap:5 }}>
-                          <span style={{ color:'rgba(255,255,255,0.18)', fontSize:9, fontFamily:'monospace' }}>
-                            {new Date(m.created_at).toLocaleTimeString('de-DE', { hour:'2-digit', minute:'2-digit' })}
+                          <span style={{ color:'rgba(255,255,255,0.18)', fontSize:9, fontFamily:'monospace', whiteSpace:'nowrap' }}>
+                            {formatMsgTime(m.created_at)}
                           </span>
+                          {isMine && (
+                            <span title={m.read_by_recipient ? 'Gelesen' : 'Gesendet'}
+                              style={{ fontSize:10, lineHeight:1, color: m.read_by_recipient ? '#4ecdc4' : 'rgba(255,255,255,0.2)' }}>
+                              {m.read_by_recipient ? '✓✓' : '✓'}
+                            </span>
+                          )}
                           <button onClick={() => deleteMsg(m.id)} style={{ background:'transparent', border:'none',
                             cursor:'pointer', padding:'0 2px', opacity:0.3, lineHeight:1,
                             display:'flex', alignItems:'center' }}>
@@ -380,3 +386,14 @@ function InfoBox({ color, children }) {
     </div>
   );
 }
+
+function formatMsgTime(isoStr) {
+  const d   = new Date(isoStr);
+  const now = new Date();
+  const isToday    = d.toDateString() === now.toDateString();
+  const isThisYear = d.getFullYear() === now.getFullYear();
+  const time = d.toLocaleTimeString('de-DE', { hour:'2-digit', minute:'2-digit' });
+  if (isToday) return time;
+  if (isThisYear) return `${d.toLocaleDateString('de-DE', { day:'numeric', month:'short' })} ${time}`;
+  return `${d.toLocaleDateString('de-DE', { day:'numeric', month:'short', year:'numeric' })} ${time}`;
+}