diff --git a/plugins/rms.auth.smtp_relay/index.js b/plugins/rms.auth.smtp_relay/index.js
index 8f0108a..a44614d 100644
--- a/plugins/rms.auth.smtp_relay/index.js
+++ b/plugins/rms.auth.smtp_relay/index.js
@@ -76,15 +76,22 @@ async function createPlugin(ctx) {
         html: String(payload.html || "")
       };
       let delivered = false;
+      let smtpError = "";
       try {
         delivered = await deliverViaSmtp(entry);
       } catch (error) {
-        entry.smtpError = String(error && error.message ? error.message : error);
+        smtpError = String(error && error.message ? error.message : error);
+        entry.smtpError = smtpError;
       }
       entry.delivered = delivered;
       entry.transport = delivered ? "smtp" : "outbox-fallback";
       await ctx.appendMailOutbox(entry);
-      return { ok: true, delivered, transport: delivered ? "smtp" : "outbox-fallback" };
+      return {
+        ok: true,
+        delivered,
+        transport: delivered ? "smtp" : "outbox-fallback",
+        smtpError: smtpError || null
+      };
     },
     async health() {
       const config = readTransportConfig();
diff --git a/public/app.js b/public/app.js
index 737bce1..50368b0 100644
--- a/public/app.js
+++ b/public/app.js
@@ -11,6 +11,7 @@ let activationWatchInFlight = false;
 let activationPending = false;
 let remainingUsageTimer = null;
 let resumeRefreshInFlight = false;
+let rotorCompassDragPointerId = null;
 
 const state = {
   user: null,
@@ -716,6 +717,51 @@ function bindEvents() {
       await setOpenWebRxRotor();
     });
   }
+  if (els.rotorCompass) {
+    els.rotorCompass.addEventListener("pointerdown", (event) => {
+      if (!els.rotorTarget || els.rotorTarget.disabled) {
+        return;
+      }
+      if (event.pointerType === "mouse" && event.button !== 0) {
+        return;
+      }
+      event.preventDefault();
+      rotorCompassDragPointerId = event.pointerId;
+      if (typeof els.rotorCompass.setPointerCapture === "function") {
+        try {
+          els.rotorCompass.setPointerCapture(event.pointerId);
+        } catch {
+          // ignore pointer capture errors
+        }
+      }
+      els.rotorCompass.classList.add("is-dragging");
+      updateRotorTargetFromPointerEvent(event);
+    });
+    els.rotorCompass.addEventListener("pointermove", (event) => {
+      if (rotorCompassDragPointerId !== event.pointerId) {
+        return;
+      }
+      event.preventDefault();
+      updateRotorTargetFromPointerEvent(event);
+    });
+    const stopRotorCompassDrag = (event) => {
+      if (rotorCompassDragPointerId !== event.pointerId) {
+        return;
+      }
+      if (typeof els.rotorCompass.releasePointerCapture === "function") {
+        try {
+          els.rotorCompass.releasePointerCapture(event.pointerId);
+        } catch {
+          // ignore pointer capture errors
+        }
+      }
+      rotorCompassDragPointerId = null;
+      els.rotorCompass.classList.remove("is-dragging");
+    };
+    els.rotorCompass.addEventListener("pointerup", stopRotorCompassDrag);
+    els.rotorCompass.addEventListener("pointercancel", stopRotorCompassDrag);
+    els.rotorCompass.addEventListener("lostpointercapture", stopRotorCompassDrag);
+  }
   if (els.openwebrxBandSetBtn) {
     els.openwebrxBandSetBtn.addEventListener("click", async () => {
       await setOpenWebRxBand();
@@ -2031,6 +2077,43 @@ async function setOpenWebRxRotor() {
   }
 }
 
+function normalizeCompassAzimuth(value) {
+  return ((Number(value) % 360) + 360) % 360;
+}
+
+function rotorTargetBounds() {
+  const rotor = state.openWebRx && state.openWebRx.rotor ? state.openWebRx.rotor : null;
+  const min = rotor && Number.isFinite(Number(rotor.min)) ? Number(rotor.min) : 0;
+  const max = rotor && Number.isFinite(Number(rotor.max)) ? Number(rotor.max) : 360;
+  return {
+    min: Math.min(min, max),
+    max: Math.max(min, max)
+  };
+}
+
+function updateRotorTargetFromPointerEvent(event) {
+  if (!els.rotorCompass || !els.rotorTarget) {
+    return;
+  }
+  const rect = els.rotorCompass.getBoundingClientRect();
+  const centerX = rect.left + rect.width / 2;
+  const centerY = rect.top + rect.height / 2;
+  const pointerX = Number(event.clientX);
+  const pointerY = Number(event.clientY);
+  if (!Number.isFinite(pointerX) || !Number.isFinite(pointerY)) {
+    return;
+  }
+  const dx = pointerX - centerX;
+  const dy = pointerY - centerY;
+  if (Math.abs(dx) < 0.5 && Math.abs(dy) < 0.5) {
+    return;
+  }
+  const azimuth = normalizeCompassAzimuth((Math.atan2(dx, -dy) * 180) / Math.PI);
+  const bounds = rotorTargetBounds();
+  const clamped = Math.min(bounds.max, Math.max(bounds.min, Math.round(azimuth)));
+  els.rotorTarget.value = String(clamped);
+}
+
 function renderRotorState() {
   if (!els.rotorCurrent) {
     return;
diff --git a/public/index.html b/public/index.html
index d35247a..e2c8bb8 100644
--- a/public/index.html
+++ b/public/index.html
@@ -204,7 +204,7 @@
                       <button type="button" class="ghost-btn" data-azimuth="315">NW</button>
                     </div>
                   </div>
-                  <div id="rotorCompass" class="rotor-compass" aria-label="Rotor Kompass">
+                  <div id="rotorCompass" class="rotor-compass" aria-label="Rotor Kompass" title="Mit Maus oder Touch den Ziel-Azimut waehlen">
                     <span class="rotor-mark rotor-mark-n">0</span>
                     <span class="rotor-mark rotor-mark-e">90</span>
                     <span class="rotor-mark rotor-mark-s">180</span>
diff --git a/public/styles.css b/public/styles.css
index 80c5fbf..9ec387d 100644
--- a/public/styles.css
+++ b/public/styles.css
@@ -510,6 +510,13 @@ button:disabled {
   background: radial-gradient(circle at 35% 30%, rgba(255,255,255,0.1), rgba(15,23,42,0.88) 65%);
   box-shadow: inset 0 0 0 1px rgba(255,255,255,0.05);
   flex: 0 0 auto;
+  cursor: crosshair;
+  touch-action: none;
+  user-select: none;
+}
+
+.rotor-compass.is-dragging {
+  cursor: grabbing;
 }
 
 .rotor-mark {
diff --git a/server/index.js b/server/index.js
index 31f4f23..82f92c3 100644
--- a/server/index.js
+++ b/server/index.js
@@ -1047,12 +1047,27 @@ async function handleRequestAccess(req, res, body) {
       actionLink: link,
       actionLabel: user.status === "active" ? "Jetzt einloggen" : "E-Mail bestaetigen"
     });
-    await sendEmailMessage(
-      email,
-      message.subject,
-      message.text,
-      message.html
-    );
+    try {
+      await sendEmailMessage(
+        email,
+        message.subject,
+        message.text,
+        message.html,
+        { strictDelivery: true }
+      );
+    } catch (error) {
+      if (isChallengeDeliveryError(error)) {
+        await appendAudit("auth.request_access_failed", user, {
+          status: user.status,
+          requestedMethod: requestedMethod || null,
+          method: "fallback-mail",
+          code: error.code,
+          reason: error && error.details ? error.details.reason : null
+        });
+        return sendError(res, 502, error.code, error.publicMessage || "E-Mail konnte nicht zugestellt werden. Bitte spaeter erneut versuchen.");
+      }
+      throw error;
+    }
     await appendAudit("auth.request_access", user, {
       status: user.status,
       requestedMethod: requestedMethod || null,
@@ -1089,14 +1104,29 @@ async function handleRequestAccess(req, res, body) {
       actionLink: link,
       actionLabel: user.status === "active" ? "Jetzt einloggen" : "E-Mail bestaetigen"
     });
-    await dispatchAuthChallenge(req, user, selectedMethod, {
-      type: "link",
-      subject: message.subject,
-      text: message.text,
-      html: message.html,
-      token,
-      link
-    });
+    try {
+      await dispatchAuthChallenge(req, user, selectedMethod, {
+        type: "link",
+        subject: message.subject,
+        text: message.text,
+        html: message.html,
+        token,
+        link
+      });
+    } catch (error) {
+      if (isChallengeDeliveryError(error)) {
+        await appendAudit("auth.request_access_failed", user, {
+          status: user.status,
+          requestedMethod: requestedMethod || null,
+          method: selectedMethod.id,
+          challengeType,
+          code: error.code,
+          reason: error && error.details ? error.details.reason : null
+        });
+        return sendError(res, 502, error.code, error.publicMessage || "E-Mail konnte nicht zugestellt werden. Bitte spaeter erneut versuchen.");
+      }
+      throw error;
+    }
   } else if (selectedMethod.type === "otp") {
     const otpCode = await issueOtpChallenge(user.id, user.status === "active" ? "login" : "verify");
     challengeHint = `Code wurde ueber ${selectedMethod.label} gesendet.`;
@@ -1107,13 +1137,28 @@ async function handleRequestAccess(req, res, body) {
       text: `Dein Code lautet: ${otpCode}`,
       code: otpCode
     });
-    await dispatchAuthChallenge(req, user, selectedMethod, {
-      type: "otp",
-      subject: message.subject,
-      text: message.text,
-      html: message.html,
-      code: otpCode
-    });
+    try {
+      await dispatchAuthChallenge(req, user, selectedMethod, {
+        type: "otp",
+        subject: message.subject,
+        text: message.text,
+        html: message.html,
+        code: otpCode
+      });
+    } catch (error) {
+      if (isChallengeDeliveryError(error)) {
+        await appendAudit("auth.request_access_failed", user, {
+          status: user.status,
+          requestedMethod: requestedMethod || null,
+          method: selectedMethod.id,
+          challengeType,
+          code: error.code,
+          reason: error && error.details ? error.details.reason : null
+        });
+        return sendError(res, 502, error.code, error.publicMessage || "E-Mail konnte nicht zugestellt werden. Bitte spaeter erneut versuchen.");
+      }
+      throw error;
+    }
   } else if (selectedMethod.type === "oauth") {
     const purpose = user.status === "active" ? "login" : "verify";
     const stateToken = await issueOauthChallenge(user.id, purpose, selectedMethod.id);
@@ -2285,7 +2330,7 @@ async function dispatchAuthChallenge(req, user, method, payload) {
     source: "server-prelog"
   });
 
-  await plugin.instance.execute("send_challenge", {
+  const result = await plugin.instance.execute("send_challenge", {
     methodId: method.id,
     methodType: method.type,
     user: sanitizeUser(user),
@@ -2293,6 +2338,10 @@ async function dispatchAuthChallenge(req, user, method, payload) {
     origin: publicBaseUrlFor(req),
     payload
   }, { user });
+
+  if (result && result.delivered === false && result.smtpError) {
+    throw buildAuthChallengeDeliveryError(result.smtpError, method, user);
+  }
 }
 
 async function issueOtpChallenge(userId, purpose) {
@@ -2472,12 +2521,29 @@ async function ensureMailOutboxInitialized() {
   }
 }
 
-async function sendEmailMessage(to, subject, text, html = "") {
+function buildAuthChallengeDeliveryError(reason, method, user) {
+  const error = new Error("E-Mail konnte nicht zugestellt werden");
+  error.code = "auth.challenge_delivery_failed";
+  error.publicMessage = "E-Mail konnte nicht zugestellt werden. Bitte spaeter erneut versuchen.";
+  error.details = {
+    reason: String(reason || "delivery-failed"),
+    method: method && method.id ? String(method.id) : null,
+    userId: user && user.id ? String(user.id) : null
+  };
+  return error;
+}
+
+function isChallengeDeliveryError(error) {
+  return Boolean(error && error.code === "auth.challenge_delivery_failed");
+}
+
+async function sendEmailMessage(to, subject, text, html = "", options = {}) {
+  const strictDelivery = Boolean(options && options.strictDelivery);
   const smtpMethod = listPublicAuthMethods().find((entry) => entry.id === "smtp-link");
   if (smtpMethod) {
     const plugin = runtime.plugins.get(smtpMethod.pluginId);
     if (plugin && typeof plugin.instance.execute === "function") {
-      await plugin.instance.execute("send_challenge", {
+      const result = await plugin.instance.execute("send_challenge", {
         methodId: smtpMethod.id,
         methodType: smtpMethod.type,
         user: null,
@@ -2490,9 +2556,15 @@ async function sendEmailMessage(to, subject, text, html = "") {
           html: String(html || "")
         }
       }, { user: null });
+      if (strictDelivery && result && result.delivered === false && result.smtpError) {
+        throw buildAuthChallengeDeliveryError(result.smtpError, smtpMethod, null);
+      }
       return;
     }
   }
+  if (strictDelivery) {
+    throw buildAuthChallengeDeliveryError("smtp-method-unavailable", { id: "smtp-link" }, null);
+  }
   const entry = {
     at: new Date().toISOString(),
     to,
diff --git a/test/auth-methods.integration.test.js b/test/auth-methods.integration.test.js
index 7def689..7fbddb6 100644
--- a/test/auth-methods.integration.test.js
+++ b/test/auth-methods.integration.test.js
@@ -1020,6 +1020,67 @@ test("new users default to smtp-link and outbox uses smtp relay plugin", async (
   }
 });
 
+test("request-access returns error when SMTP delivery fails", async (t) => {
+  const rootDir = path.resolve(__dirname, "..");
+  const dataDir = await fs.mkdtemp(path.join(os.tmpdir(), "rms-smtp-fail-test-"));
+  const port = randomPort();
+  const baseUrl = `http://127.0.0.1:${port}`;
+
+  const server = spawn(process.execPath, ["server/index.js"], {
+    cwd: rootDir,
+    env: {
+      ...process.env,
+      PORT: String(port),
+      DATA_DIR: dataDir,
+      ADMIN_EMAILS: "admin@arcg.at",
+      PRIMARY_EMAIL_DOMAIN: "arcg.at",
+      PUBLIC_BASE_URL: baseUrl,
+      SMTP_HOST: "127.0.0.1",
+      SMTP_PORT: "1",
+      SMTP_SECURE: "false"
+    },
+    stdio: ["ignore", "pipe", "pipe"]
+  });
+
+  let serverStdErr = "";
+  server.stderr.on("data", (chunk) => {
+    serverStdErr += String(chunk);
+  });
+
+  t.after(async () => {
+    if (!server.killed) {
+      server.kill("SIGTERM");
+    }
+    await fs.rm(dataDir, { recursive: true, force: true });
+  });
+
+  await waitForServer(baseUrl);
+
+  let deliveryError = null;
+  try {
+    await requestJson(baseUrl, "/v1/auth/request-access", {
+      method: "POST",
+      body: { email: "deliveryfail@arcg.at" }
+    });
+  } catch (error) {
+    deliveryError = error;
+  }
+
+  assert.ok(deliveryError, "request-access should fail on smtp delivery error");
+  assert.equal(deliveryError.status, 502);
+  assert.equal(deliveryError.payload.error.code, "auth.challenge_delivery_failed");
+
+  const outbox = await readOutbox(dataDir);
+  const failed = [...outbox].reverse().find((entry) => entry.to === "deliveryfail@arcg.at" && entry.via === "rms.auth.smtp_relay" && entry.delivered === false);
+  assert.ok(failed, "failed smtp outbox entry expected");
+  assert.equal(failed.transport, "outbox-fallback");
+  assert.ok(String(failed.smtpError || "").length > 0, "smtp error must be recorded");
+
+  if (server.exitCode !== null && server.exitCode !== 0) {
+    throw new Error(`Server exited unexpectedly: ${server.exitCode}\n${serverStdErr}`);
+  }
+});
+
 test("public auth methods expose smtp-link first with 'per Mail' label", async (t) => {
   const rootDir = path.resolve(__dirname, "..");
   const dataDir = await fs.mkdtemp(path.join(os.tmpdir(), "rms-public-methods-test-"));