diff --git a/client/src/App.tsx b/client/src/App.tsx
index 14ae098..a02662f 100644
--- a/client/src/App.tsx
+++ b/client/src/App.tsx
@@ -116,7 +116,18 @@ export default function App() {
     }
   }, [isAuthenticated])
 
+  const location = useLocation()
+  const isSharedPage = location.pathname.startsWith('/shared/')
+
   useEffect(() => {
+    // Shared page always forces light mode
+    if (isSharedPage) {
+      document.documentElement.classList.remove('dark')
+      const meta = document.querySelector('meta[name="theme-color"]')
+      if (meta) meta.setAttribute('content', '#ffffff')
+      return
+    }
+
     const mode = settings.dark_mode
     const applyDark = (isDark: boolean) => {
       document.documentElement.classList.toggle('dark', isDark)
@@ -132,7 +143,7 @@ export default function App() {
       return () => mq.removeEventListener('change', handler)
     }
     applyDark(mode === true || mode === 'dark')
-  }, [settings.dark_mode])
+  }, [settings.dark_mode, isSharedPage])
 
   return (
     <TranslationProvider>
diff --git a/client/src/pages/AdminPage.tsx b/client/src/pages/AdminPage.tsx
index 38fd59b..b596261 100644
--- a/client/src/pages/AdminPage.tsx
+++ b/client/src/pages/AdminPage.tsx
@@ -1000,6 +1000,21 @@ export default function AdminPage(): React.ReactElement {
                       />
                     </div>
                   ))}
+                  {/* Skip TLS toggle */}
+                  <div style={{ display: 'flex', alignItems: 'center', justifyContent: 'space-between', padding: '4px 0' }}>
+                    <div>
+                      <span className="text-xs font-medium text-slate-500">Skip TLS certificate check</span>
+                      <p className="text-[10px] text-slate-400 mt-0.5">Enable for self-signed certificates on local mail servers</p>
+                    </div>
+                    <button onClick={async () => {
+                      const newVal = smtpValues.smtp_skip_tls_verify === 'true' ? 'false' : 'true'
+                      setSmtpValues(prev => ({ ...prev, smtp_skip_tls_verify: newVal }))
+                      await authApi.updateAppSettings({ smtp_skip_tls_verify: newVal }).catch(() => {})
+                    }}
+                      className={`relative inline-flex h-6 w-11 items-center rounded-full transition-colors ${smtpValues.smtp_skip_tls_verify === 'true' ? 'bg-slate-900' : 'bg-slate-300'}`}>
+                      <span className={`inline-block h-4 w-4 transform rounded-full bg-white transition-transform ${smtpValues.smtp_skip_tls_verify === 'true' ? 'translate-x-6' : 'translate-x-1'}`} />
+                    </button>
+                  </div>
                   <button
                     onClick={async () => {
                       for (const k of ['smtp_host', 'smtp_port', 'smtp_user', 'smtp_pass', 'smtp_from']) {
diff --git a/client/src/pages/SharedTripPage.tsx b/client/src/pages/SharedTripPage.tsx
index 3948f74..4d304a6 100644
--- a/client/src/pages/SharedTripPage.tsx
+++ b/client/src/pages/SharedTripPage.tsx
@@ -4,6 +4,7 @@ import { MapContainer, TileLayer, Marker, Tooltip, useMap } from 'react-leaflet'
 import L from 'leaflet'
 import { useTranslation, SUPPORTED_LANGUAGES } from '../i18n'
 import { useSettingsStore } from '../store/settingsStore'
+import { getLocaleForLanguage } from '../i18n'
 import { shareApi } from '../api/client'
 import { getCategoryIcon } from '../components/shared/categoryIcons'
 import { createElement } from 'react'
@@ -43,7 +44,6 @@ export default function SharedTripPage() {
   const [error, setError] = useState(false)
   const [selectedDay, setSelectedDay] = useState<number | null>(null)
   const [activeTab, setActiveTab] = useState('plan')
-  const { updateSetting } = useSettingsStore()
   const [showLangPicker, setShowLangPicker] = useState(false)
 
   useEffect(() => {
@@ -127,7 +127,11 @@ export default function SharedTripPage() {
           {showLangPicker && (
             <div style={{ position: 'absolute', top: '100%', right: 0, marginTop: 6, background: 'white', borderRadius: 10, boxShadow: '0 4px 16px rgba(0,0,0,0.2)', padding: 4, zIndex: 50, minWidth: 150 }}>
               {SUPPORTED_LANGUAGES.map(lang => (
-                <button key={lang.value} onClick={() => { updateSetting('language', lang.value); setShowLangPicker(false) }}
+                <button key={lang.value} onClick={() => {
+                  // Set language locally without API call (shared page has no auth)
+                  useSettingsStore.setState(s => ({ settings: { ...s.settings, language: lang.value } }))
+                  setShowLangPicker(false)
+                }}
                   style={{ display: 'block', width: '100%', padding: '6px 12px', border: 'none', background: 'none', textAlign: 'left', cursor: 'pointer', fontSize: 12, color: '#374151', borderRadius: 6, fontFamily: 'inherit' }}
                   onMouseEnter={e => e.currentTarget.style.background = '#f3f4f6'}
                   onMouseLeave={e => e.currentTarget.style.background = 'none'}
diff --git a/server/src/routes/auth.ts b/server/src/routes/auth.ts
index 683f42d..479845e 100644
--- a/server/src/routes/auth.ts
+++ b/server/src/routes/auth.ts
@@ -518,7 +518,7 @@ router.get('/validate-keys', authenticate, async (req: Request, res: Response) =
   res.json(result);
 });
 
-const ADMIN_SETTINGS_KEYS = ['allow_registration', 'allowed_file_types', 'require_mfa', 'smtp_host', 'smtp_port', 'smtp_user', 'smtp_pass', 'smtp_from', 'notification_webhook_url', 'app_url'];
+const ADMIN_SETTINGS_KEYS = ['allow_registration', 'allowed_file_types', 'require_mfa', 'smtp_host', 'smtp_port', 'smtp_user', 'smtp_pass', 'smtp_from', 'smtp_skip_tls_verify', 'notification_webhook_url', 'app_url'];
 
 router.get('/app-settings', authenticate, (req: Request, res: Response) => {
   const authReq = req as AuthRequest;
diff --git a/server/src/services/notifications.ts b/server/src/services/notifications.ts
index 3cbb02d..86884b4 100644
--- a/server/src/services/notifications.ts
+++ b/server/src/services/notifications.ts
@@ -220,11 +220,13 @@ async function sendEmail(to: string, subject: string, body: string, userId?: num
   const lang = userId ? getUserLanguage(userId) : 'en';
 
   try {
+    const skipTls = process.env.SMTP_SKIP_TLS_VERIFY === 'true' || getAppSetting('smtp_skip_tls_verify') === 'true';
     const transporter = nodemailer.createTransport({
       host: config.host,
       port: config.port,
       secure: config.secure,
       auth: config.user ? { user: config.user, pass: config.pass } : undefined,
+      ...(skipTls ? { tls: { rejectUnauthorized: false } } : {}),
     });
 
     await transporter.sendMail({