diff --git a/app/api/favicon/route.ts b/app/api/favicon/route.ts
index 41d292c1e..3c817c6f6 100644
--- a/app/api/favicon/route.ts
+++ b/app/api/favicon/route.ts
@@ -18,6 +18,9 @@ const cache = new Map<string, CacheEntry>();
 const negativeCache = new Map<string, NegativeCacheEntry>();
 const NEGATIVE_CACHE_TTL_MS = 24 * 60 * 60 * 1000; // 1 day
 const NEGATIVE_CACHE_MAX_SIZE = 2000;
+// A refresh request (?v=<ms>) refetches a domain at most this often, so the
+// unauthenticated route can't be used to hammer the upstream icon service.
+const MIN_REFRESH_INTERVAL_MS = 60 * 1000;
 
 // 1x1 transparent PNG. Returned with HTTP 200 (instead of 404) when no
 // favicon exists for a domain, so the browser's <img> tag loads it cleanly
@@ -444,16 +447,17 @@ export async function GET(request: NextRequest) {
 
   // Resolve to root domain so subdomains share the same favicon lookup
   const normalizedDomain = getRootDomain(domain.toLowerCase());
+  const refreshAfter = parseRefreshAfter(request.nextUrl.searchParams.get('v'));
 
   // Check negative cache (domains known to have no favicon)
   const neg = negativeCache.get(normalizedDomain);
-  if (neg && Date.now() - neg.fetchedAt < NEGATIVE_CACHE_TTL_MS) {
+  if (neg && Date.now() - neg.fetchedAt < NEGATIVE_CACHE_TTL_MS && !isStale(neg.fetchedAt, refreshAfter)) {
     return new NextResponse(TRANSPARENT_PNG, { headers: MISSING_FAVICON_HEADERS });
   }
 
   // Check cache
   const cached = cache.get(normalizedDomain);
-  if (cached && Date.now() - cached.fetchedAt < CACHE_TTL_MS) {
+  if (cached && Date.now() - cached.fetchedAt < CACHE_TTL_MS && !isStale(cached.fetchedAt, refreshAfter)) {
     return new NextResponse(cached.data, {
       headers: faviconHeaders(cached.contentType),
     });
@@ -490,6 +494,7 @@ export async function GET(request: NextRequest) {
     }
 
     // Cache the result
+    negativeCache.delete(normalizedDomain);
     evictOldest();
     cache.set(normalizedDomain, { data, contentType, fetchedAt: Date.now() });
 
@@ -497,6 +502,10 @@ export async function GET(request: NextRequest) {
       headers: faviconHeaders(contentType),
     });
   } catch {
+    // A refresh that can't reach upstream keeps showing the icon we have.
+    if (cached) {
+      return new NextResponse(cached.data, { headers: faviconHeaders(cached.contentType) });
+    }
     return new NextResponse(null, {
       status: 502,
       headers: { 'Cache-Control': 'public, max-age=300' }, // 5 min
@@ -504,6 +513,22 @@ export async function GET(request: NextRequest) {
   }
 }
 
+/**
+ * The time from a ?v= refresh stamp, or null. Avatars send the moment the
+ * user asked for fresh sender icons (#960); a stamp in the future is clamped
+ * to now so it can't keep a domain permanently uncached.
+ */
+function parseRefreshAfter(value: string | null): number | null {
+  if (!value || !/^\d{1,15}$/.test(value)) return null;
+  return Math.min(Number(value), Date.now());
+}
+
+/** Whether a cache entry predates the refresh the client asked for. */
+function isStale(fetchedAt: number, refreshAfter: number | null): boolean {
+  if (refreshAfter === null || fetchedAt >= refreshAfter) return false;
+  return Date.now() - fetchedAt >= MIN_REFRESH_INTERVAL_MS;
+}
+
 const RASTER_FAVICON_TYPES = new Set([
   'image/x-icon',
   'image/vnd.microsoft.icon',
diff --git a/components/settings/appearance-settings.tsx b/components/settings/appearance-settings.tsx
index 09cf63087..df3020751 100644
--- a/components/settings/appearance-settings.tsx
+++ b/components/settings/appearance-settings.tsx
@@ -7,10 +7,12 @@ import { SettingsSection, SettingItem, RadioGroup, ToggleSwitch } from './settin
 import { cn } from '@/lib/utils';
 import { useTour } from '@/components/tour/tour-provider';
 import { Button } from '@/components/ui/button';
-import { PlayCircle } from '@/components/icons';
+import { PlayCircle, RefreshCw } from '@/components/icons';
 import { usePolicyStore } from '@/stores/policy-store';
 import { IS_LITE } from '@/lib/lite';
 import { MessageListOrderSettings } from './message-list-order-settings';
+import { useFaviconRefreshStore } from '@/stores/favicon-refresh-store';
+import { toast } from '@/stores/toast-store';
 
 const DENSITY_PREVIEW: Record<Density, { py: string; gap: string; showAvatar: boolean; showPreview: boolean }> = {
   'extra-compact': { py: 'py-0.5', gap: 'gap-1.5', showAvatar: false, showPreview: false },
@@ -71,6 +73,7 @@ export function AppearanceSettings() {
   const { theme, setTheme } = useThemeStore();
   const { fontSize, density, animationsEnabled, senderFavicons, showAvatarsInJunk, showOnboardingOnNewDevices, updateSetting } = useSettingsStore();
   const { startTour, resetTourCompletion } = useTour();
+  const refreshFavicons = useFaviconRefreshStore((s) => s.refresh);
   const { isSettingLocked, isSettingHidden } = usePolicyStore();
 
   return (
@@ -137,6 +140,20 @@ export function AppearanceSettings() {
         </SettingItem>
       )}
 
+      {!IS_LITE && senderFavicons && (
+        <SettingItem label={tAdvanced('sender_favicons.refresh_label')} description={tAdvanced('sender_favicons.refresh_description')}>
+          <Button
+            variant="outline"
+            size="sm"
+            onClick={() => { refreshFavicons(); toast.success(tAdvanced('sender_favicons.refresh_done')); }}
+            className="text-xs h-7"
+          >
+            <RefreshCw className="w-3.5 h-3.5 me-1" />
+            {tAdvanced('sender_favicons.refresh_button')}
+          </Button>
+        </SettingItem>
+      )}
+
       <SettingItem label={tAdvanced('show_avatars_in_junk.label')} description={tAdvanced('show_avatars_in_junk.description')}>
         <ToggleSwitch checked={showAvatarsInJunk} onChange={(checked) => updateSetting('showAvatarsInJunk', checked)} />
       </SettingItem>
diff --git a/components/ui/__tests__/avatar.test.tsx b/components/ui/__tests__/avatar.test.tsx
index 14267b86c..63da44c33 100644
--- a/components/ui/__tests__/avatar.test.tsx
+++ b/components/ui/__tests__/avatar.test.tsx
@@ -1,6 +1,7 @@
-import { render } from '@testing-library/react';
+import { act, fireEvent, render } from '@testing-library/react';
 import { describe, it, expect } from 'vitest';
 import { Avatar } from '../avatar';
+import { useFaviconRefreshStore } from '@/stores/favicon-refresh-store';
 
 describe('Avatar', () => {
   it('renders initials from full name', () => {
@@ -30,4 +31,21 @@ describe('Avatar', () => {
     const colorB = (b.firstChild as HTMLElement).style.backgroundColor;
     expect(colorA).toBe(colorB);
   });
+
+  // #960: a refresh must reach past the browser's two-week cache of the old
+  // icon and retry domains whose favicon failed before.
+  it('requests the sender favicon again after a refresh', () => {
+    useFaviconRefreshStore.setState({ refreshedAt: 0 });
+    const { container } = render(<Avatar name="Jan" email="jan@example.cz" />);
+    const img = () => container.querySelector('img');
+    expect(img()?.getAttribute('src')).toBe('/api/favicon?domain=example.cz');
+
+    fireEvent.error(img()!);
+    expect(img()).toBeNull();
+
+    act(() => useFaviconRefreshStore.getState().refresh());
+    const stamp = useFaviconRefreshStore.getState().refreshedAt;
+    expect(stamp).toBeGreaterThan(0);
+    expect(img()?.getAttribute('src')).toBe(`/api/favicon?domain=example.cz&v=${stamp}`);
+  });
 });
diff --git a/components/ui/avatar.tsx b/components/ui/avatar.tsx
index 2478c78a6..82f10828d 100644
--- a/components/ui/avatar.tsx
+++ b/components/ui/avatar.tsx
@@ -8,6 +8,7 @@ import { useConfig } from "@/hooks/use-config";
 import { avatarHooks } from "@/lib/plugin-hooks";
 import { withBasePath } from "@/lib/browser-navigation";
 import { IS_LITE } from "@/lib/lite";
+import { useFaviconRefreshStore, failedFaviconDomains } from "@/stores/favicon-refresh-store";
 
 const IS_DEV = process.env.NODE_ENV !== "production";
 
@@ -63,9 +64,6 @@ function getRootDomain(domain: string): string {
   return parts.slice(-2).join(".");
 }
 
-// Module-level cache of domains whose favicons failed to load.
-// Shared across all Avatar instances to avoid re-requesting known-bad domains.
-const failedFaviconDomains = new Set<string>();
 // Personal email domains where the favicon is the mail provider logo, not the sender
 const PERSONAL_DOMAINS = new Set([
   "gmail.com", "googlemail.com", "outlook.com", "hotmail.com", "live.com",
@@ -155,6 +153,7 @@ export function Avatar({ name, email, contactPhotoUri, size = "md", className, d
   const [pluginAvatarUrl, setPluginAvatarUrl] = useState<string | null>(null);
   const [pluginAvatarFailed, setPluginAvatarFailed] = useState(false);
   const senderFavicons = useSettingsStore((s) => s.senderFavicons);
+  const faviconRefreshedAt = useFaviconRefreshStore((s) => s.refreshedAt);
   const contacts = useContactStore((s) => s.contacts);
   const { devMode } = useConfig();
 
@@ -171,6 +170,11 @@ export function Avatar({ name, email, contactPhotoUri, size = "md", className, d
     return () => { cancelled = true; };
   }, [email, name]);
 
+  // A refresh of the sender icons gives a failed favicon another chance.
+  useEffect(() => {
+    setImgError(false);
+  }, [faviconRefreshedAt]);
+
   // Look up contact photo by email from the contact store
   const resolvedContactPhoto = useMemo(() => {
     if (contactPhotoUri) return contactPhotoUri;
@@ -238,7 +242,7 @@ export function Avatar({ name, email, contactPhotoUri, size = "md", className, d
   const customAvatar = devMode && email ? CUSTOM_AVATARS[email.toLowerCase()] : null;
   const pluginAvatar = pluginAvatarFailed ? null : pluginAvatarUrl;
   const photoSrc = resolvedContactPhoto || pluginAvatar || customAvatar || profilePic || null;
-  const faviconSrc = !imgError && !domainFailed && showFavicon ? withBasePath(`/api/favicon?domain=${encodeURIComponent(faviconDomain!)}`) : null;
+  const faviconSrc = !imgError && !domainFailed && showFavicon ? withBasePath(`/api/favicon?domain=${encodeURIComponent(faviconDomain!)}${faviconRefreshedAt ? `&v=${faviconRefreshedAt}` : ""}`) : null;
   const imgSrc = disableImages ? null : (photoSrc || faviconSrc);
   const isFavicon = imgSrc !== null && imgSrc === faviconSrc;
 
diff --git a/lib/__tests__/favicon-route-refresh.test.ts b/lib/__tests__/favicon-route-refresh.test.ts
new file mode 100644
index 000000000..d15ceba08
--- /dev/null
+++ b/lib/__tests__/favicon-route-refresh.test.ts
@@ -0,0 +1,68 @@
+// @vitest-environment node
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import { NextRequest } from 'next/server';
+
+// #960: the route caches a domain's favicon for two weeks. A sender who
+// replaced their icon kept showing the old one; a ?v=<ms> refresh stamp newer
+// than the cached copy must fetch it again.
+
+const T0 = Date.UTC(2026, 9, 1);
+let now = T0;
+let icon = 1;
+const fetchMock = vi.fn(async () =>
+  new Response(new Uint8Array(64).fill(icon), { headers: { 'content-type': 'image/png' } }),
+);
+
+beforeEach(() => {
+  now = T0;
+  icon = 1;
+  fetchMock.mockClear();
+  vi.spyOn(Date, 'now').mockImplementation(() => now);
+  vi.stubGlobal('fetch', fetchMock);
+});
+
+afterEach(() => {
+  vi.restoreAllMocks();
+  vi.unstubAllGlobals();
+  vi.resetModules();
+});
+
+async function get(query: string) {
+  const { GET } = await import('@/app/api/favicon/route');
+  const res = await GET(new NextRequest(`https://webmail.example/api/favicon?${query}`));
+  return new Uint8Array(await res.arrayBuffer())[0];
+}
+
+describe('favicon route refresh', () => {
+  it('serves the cached icon until a newer refresh stamp arrives', async () => {
+    expect(await get('domain=example.cz')).toBe(1);
+
+    icon = 2; // the sender replaces their favicon
+    now = T0 + 60 * 60 * 1000;
+    expect(await get('domain=example.cz')).toBe(1);
+    expect(fetchMock).toHaveBeenCalledTimes(1);
+
+    expect(await get(`domain=example.cz&v=${now}`)).toBe(2);
+    expect(fetchMock).toHaveBeenCalledTimes(2);
+
+    // The fresh copy is cached again: same stamp, plain request, no refetch.
+    expect(await get(`domain=example.cz&v=${now}`)).toBe(2);
+    expect(await get('domain=example.cz')).toBe(2);
+    expect(fetchMock).toHaveBeenCalledTimes(2);
+  });
+
+  it('refetches a domain at most once a minute, even with future stamps', async () => {
+    expect(await get('domain=example.cz')).toBe(1);
+    icon = 2;
+    now = T0 + 30 * 1000;
+    expect(await get(`domain=example.cz&v=${now + 10 ** 9}`)).toBe(1);
+    expect(fetchMock).toHaveBeenCalledTimes(1);
+  });
+
+  it('keeps the cached icon when the refresh cannot reach upstream', async () => {
+    expect(await get('domain=example.cz')).toBe(1);
+    now = T0 + 60 * 60 * 1000;
+    fetchMock.mockRejectedValueOnce(new Error('offline'));
+    expect(await get(`domain=example.cz&v=${now}`)).toBe(1);
+  });
+});
diff --git a/locales/ar/common.json b/locales/ar/common.json
index 5f37b3696..1789c06be 100644
--- a/locales/ar/common.json
+++ b/locales/ar/common.json
@@ -2094,7 +2094,11 @@
       },
       "sender_favicons": {
         "label": "أيقونات مواقع المرسلين",
-        "description": "إظهار أيقونات المواقع كصور شخصية للمرسلين من الشركات"
+        "description": "إظهار أيقونات المواقع كصور شخصية للمرسلين من الشركات",
+        "refresh_label": "تحديث أيقونات المرسلين",
+        "refresh_description": "جلب أيقونات المواقع مرة أخرى، مثلاً عندما يغيّر المرسل أيقونته",
+        "refresh_button": "تحديث",
+        "refresh_done": "سيتم جلب أيقونات المرسلين مرة أخرى"
       },
       "show_avatars_in_junk": {
         "label": "إظهار الصور الشخصية في مجلد البريد المزعج",
diff --git a/locales/ca/common.json b/locales/ca/common.json
index 214dac12c..646530d1c 100644
--- a/locales/ca/common.json
+++ b/locales/ca/common.json
@@ -2094,7 +2094,11 @@
       },
       "sender_favicons": {
         "label": "Icones dels remitents",
-        "description": "Mostra icones de llocs web com a imatges de perfil per als remitents d'empresa"
+        "description": "Mostra icones de llocs web com a imatges de perfil per als remitents d'empresa",
+        "refresh_label": "Actualitza les icones dels remitents",
+        "refresh_description": "Torna a obtenir les icones dels llocs web, per exemple quan un remitent ha canviat la seva",
+        "refresh_button": "Actualitza",
+        "refresh_done": "Es tornaran a obtenir les icones dels remitents"
       },
       "show_avatars_in_junk": {
         "label": "Mostra els avatars a la carpeta de brossa",
diff --git a/locales/cs/common.json b/locales/cs/common.json
index ffdfc4d77..387d381f9 100644
--- a/locales/cs/common.json
+++ b/locales/cs/common.json
@@ -2087,7 +2087,11 @@
       },
       "sender_favicons": {
         "label": "Favikony odesílatelů",
-        "description": "Zobrazovat ikony webových stránek jako profilové obrázky firemních odesílatelů"
+        "description": "Zobrazovat ikony webových stránek jako profilové obrázky firemních odesílatelů",
+        "refresh_label": "Obnovit ikony odesílatelů",
+        "refresh_description": "Znovu načíst ikony webů, například když odesílatel změnil svou ikonu",
+        "refresh_button": "Obnovit",
+        "refresh_done": "Ikony odesílatelů se načtou znovu"
       },
       "show_avatars_in_junk": {
         "label": "Zobrazovat avatary ve spamu",
diff --git a/locales/da/common.json b/locales/da/common.json
index a35a306a3..24adbcaa3 100644
--- a/locales/da/common.json
+++ b/locales/da/common.json
@@ -2090,7 +2090,11 @@
       },
       "sender_favicons": {
         "label": "Afsender-favicons",
-        "description": "Vis hjemmesideikoner som profilbilleder for forretningsafsendere"
+        "description": "Vis hjemmesideikoner som profilbilleder for forretningsafsendere",
+        "refresh_label": "Opdater afsenderikoner",
+        "refresh_description": "Hent webstedsikonerne igen, f.eks. når en afsender har skiftet sit ikon",
+        "refresh_button": "Opdater",
+        "refresh_done": "Afsenderikonerne hentes igen"
       },
       "show_avatars_in_junk": {
         "label": "Vis avatarer i spam-mappe",
diff --git a/locales/de/common.json b/locales/de/common.json
index 0efab2a2c..3832be9df 100644
--- a/locales/de/common.json
+++ b/locales/de/common.json
@@ -2087,7 +2087,11 @@
       },
       "sender_favicons": {
         "label": "Absender-Favicons",
-        "description": "Website-Symbole als Profilbilder für geschäftliche Absender anzeigen"
+        "description": "Website-Symbole als Profilbilder für geschäftliche Absender anzeigen",
+        "refresh_label": "Absender-Symbole aktualisieren",
+        "refresh_description": "Website-Symbole neu laden, zum Beispiel wenn ein Absender sein Symbol geändert hat",
+        "refresh_button": "Aktualisieren",
+        "refresh_done": "Absender-Symbole werden neu geladen"
       },
       "show_avatars_in_junk": {
         "label": "Avatare im Spam-Ordner anzeigen",
diff --git a/locales/en/common.json b/locales/en/common.json
index 102ed0f14..4b3d3e2ce 100644
--- a/locales/en/common.json
+++ b/locales/en/common.json
@@ -2094,7 +2094,11 @@
       },
       "sender_favicons": {
         "label": "Sender Favicons",
-        "description": "Show website icons as profile pictures for business senders"
+        "description": "Show website icons as profile pictures for business senders",
+        "refresh_label": "Refresh Sender Icons",
+        "refresh_description": "Fetch the website icons again, for example when a sender changed theirs",
+        "refresh_button": "Refresh",
+        "refresh_done": "Sender icons will be fetched again"
       },
       "show_avatars_in_junk": {
         "label": "Show Avatars in Junk Folder",
diff --git a/locales/es/common.json b/locales/es/common.json
index c8ff4d650..ebc26351b 100644
--- a/locales/es/common.json
+++ b/locales/es/common.json
@@ -2087,7 +2087,11 @@
       },
       "sender_favicons": {
         "label": "Favicons de remitente",
-        "description": "Mostrar iconos de sitios web como fotos de perfil para remitentes empresariales"
+        "description": "Mostrar iconos de sitios web como fotos de perfil para remitentes empresariales",
+        "refresh_label": "Actualizar iconos de remitentes",
+        "refresh_description": "Volver a obtener los iconos de los sitios web, por ejemplo cuando un remitente ha cambiado el suyo",
+        "refresh_button": "Actualizar",
+        "refresh_done": "Los iconos de los remitentes se volverán a obtener"
       },
       "show_avatars_in_junk": {
         "label": "Mostrar avatares en la carpeta de spam",
diff --git a/locales/fa/common.json b/locales/fa/common.json
index 105cdc629..40782c9f8 100644
--- a/locales/fa/common.json
+++ b/locales/fa/common.json
@@ -2094,7 +2094,11 @@
       },
       "sender_favicons": {
         "label": "Favicon فرستنده",
-        "description": "نمایش آیکون وبسایت به عنوان تصویر پروفایل فرستندگان تجاری"
+        "description": "نمایش آیکون وبسایت به عنوان تصویر پروفایل فرستندگان تجاری",
+        "refresh_label": "بازخوانی آیکون فرستندگان",
+        "refresh_description": "آیکون وب‌سایت‌ها را دوباره دریافت کن، مثلاً وقتی فرستنده آیکون خود را تغییر داده است",
+        "refresh_button": "بازخوانی",
+        "refresh_done": "آیکون فرستندگان دوباره دریافت می‌شود"
       },
       "show_avatars_in_junk": {
         "label": "نمایش آواتار در پوشه هرزنامه",
diff --git a/locales/fr/common.json b/locales/fr/common.json
index 4f57757e4..4c9e05c1e 100644
--- a/locales/fr/common.json
+++ b/locales/fr/common.json
@@ -2087,7 +2087,11 @@
       },
       "sender_favicons": {
         "label": "Favicons des expéditeurs",
-        "description": "Afficher les icônes de sites web comme photos de profil pour les expéditeurs professionnels"
+        "description": "Afficher les icônes de sites web comme photos de profil pour les expéditeurs professionnels",
+        "refresh_label": "Actualiser les icônes des expéditeurs",
+        "refresh_description": "Récupérer à nouveau les icônes des sites web, par exemple quand un expéditeur a changé la sienne",
+        "refresh_button": "Actualiser",
+        "refresh_done": "Les icônes des expéditeurs vont être récupérées à nouveau"
       },
       "show_avatars_in_junk": {
         "label": "Afficher les avatars dans le dossier indésirable",
diff --git a/locales/he/common.json b/locales/he/common.json
index a62813eb8..bd8fd8b74 100644
--- a/locales/he/common.json
+++ b/locales/he/common.json
@@ -2052,7 +2052,11 @@
       },
       "sender_favicons": {
         "label": "סמלים של השולח (ניסיוני)",
-        "description": "הצג סמלי אתרים כתמונות פרופיל עבור שולחים עסקיים"
+        "description": "הצג סמלי אתרים כתמונות פרופיל עבור שולחים עסקיים",
+        "refresh_label": "רענון סמלי שולחים",
+        "refresh_description": "טעינה מחדש של סמלי האתרים, למשל כששולח החליף את הסמל שלו",
+        "refresh_button": "רענון",
+        "refresh_done": "סמלי השולחים ייטענו מחדש"
       },
       "sender_avatars": {},
       "keyboard_shortcuts": {
diff --git a/locales/hu/common.json b/locales/hu/common.json
index 280aab4bf..8fd6531a1 100644
--- a/locales/hu/common.json
+++ b/locales/hu/common.json
@@ -2090,7 +2090,11 @@
       },
       "sender_favicons": {
         "label": "Feladó faviconok",
-        "description": "Weboldal ikonok megjelenítése profilképekként az üzleti feladók számára"
+        "description": "Weboldal ikonok megjelenítése profilképekként az üzleti feladók számára",
+        "refresh_label": "Feladóikonok frissítése",
+        "refresh_description": "A webhelyikonok újbóli letöltése, például ha egy feladó lecserélte a sajátját",
+        "refresh_button": "Frissítés",
+        "refresh_done": "A feladóikonok újra le lesznek töltve"
       },
       "show_avatars_in_junk": {
         "label": "Avatárok mutatása a Spam mappában",
diff --git a/locales/it/common.json b/locales/it/common.json
index 7e782f095..794d42c7d 100644
--- a/locales/it/common.json
+++ b/locales/it/common.json
@@ -2087,7 +2087,11 @@
       },
       "sender_favicons": {
         "label": "Favicon dei mittenti",
-        "description": "Mostra le icone dei siti web come immagini profilo per i mittenti aziendali"
+        "description": "Mostra le icone dei siti web come immagini profilo per i mittenti aziendali",
+        "refresh_label": "Aggiorna icone dei mittenti",
+        "refresh_description": "Scarica di nuovo le icone dei siti web, ad esempio quando un mittente ha cambiato la sua",
+        "refresh_button": "Aggiorna",
+        "refresh_done": "Le icone dei mittenti verranno scaricate di nuovo"
       },
       "show_avatars_in_junk": {
         "label": "Mostra avatar nella cartella spam",
diff --git a/locales/ja/common.json b/locales/ja/common.json
index eda9e4023..ec1791639 100644
--- a/locales/ja/common.json
+++ b/locales/ja/common.json
@@ -2087,7 +2087,11 @@
       },
       "sender_favicons": {
         "label": "送信者ファビコン",
-        "description": "ビジネス送信者のプロフィール画像としてウェブサイトアイコンを表示"
+        "description": "ビジネス送信者のプロフィール画像としてウェブサイトアイコンを表示",
+        "refresh_label": "送信者アイコンを更新",
+        "refresh_description": "送信者がアイコンを変更した場合などに、ウェブサイトのアイコンを再取得します",
+        "refresh_button": "更新",
+        "refresh_done": "送信者アイコンを再取得します"
       },
       "show_avatars_in_junk": {
         "label": "迷惑メールフォルダでアバターを表示",
diff --git a/locales/ko/common.json b/locales/ko/common.json
index dd681dfd2..8db0c3a2c 100644
--- a/locales/ko/common.json
+++ b/locales/ko/common.json
@@ -2087,7 +2087,11 @@
       },
       "sender_favicons": {
         "label": "보낸 사람 파비콘",
-        "description": "비즈니스 메일의 경우 해당 웹사이트의 아이콘을 프로필 사진으로 보여줘요"
+        "description": "비즈니스 메일의 경우 해당 웹사이트의 아이콘을 프로필 사진으로 보여줘요",
+        "refresh_label": "발신자 아이콘 새로 고침",
+        "refresh_description": "발신자가 아이콘을 바꾼 경우 등에 웹사이트 아이콘을 다시 가져옵니다",
+        "refresh_button": "새로 고침",
+        "refresh_done": "발신자 아이콘을 다시 가져옵니다"
       },
       "show_avatars_in_junk": {
         "label": "스팸함에서 아바타 표시",
diff --git a/locales/lv/common.json b/locales/lv/common.json
index 32e7e55ed..7680004f8 100644
--- a/locales/lv/common.json
+++ b/locales/lv/common.json
@@ -2068,7 +2068,11 @@
       },
       "sender_favicons": {
         "label": "Sūtītāju ikonas",
-        "description": "Rādīt vietņu ikonas kā sūtītāju avatarus"
+        "description": "Rādīt vietņu ikonas kā sūtītāju avatarus",
+        "refresh_label": "Atsvaidzināt sūtītāju ikonas",
+        "refresh_description": "Vēlreiz ielādēt vietņu ikonas, piemēram, ja sūtītājs ir nomainījis savu ikonu",
+        "refresh_button": "Atsvaidzināt",
+        "refresh_done": "Sūtītāju ikonas tiks ielādētas vēlreiz"
       },
       "show_avatars_in_junk": {
         "label": "Rādīt avatarus mēstuļu mapē",
diff --git a/locales/mn/common.json b/locales/mn/common.json
index ec0c04933..e6bdf1ce7 100644
--- a/locales/mn/common.json
+++ b/locales/mn/common.json
@@ -2094,7 +2094,11 @@
       },
       "sender_favicons": {
         "label": "Илгээгчийн Favicons",
-        "description": "Вэб сайтын дүрсийг бизнес илгээгчдэд профайл зураг болгон харуулах"
+        "description": "Вэб сайтын дүрсийг бизнес илгээгчдэд профайл зураг болгон харуулах",
+        "refresh_label": "Илгээгчийн дүрсийг шинэчлэх",
+        "refresh_description": "Вэбсайтын дүрсийг дахин татах, жишээ нь илгээгч дүрсээ сольсон үед",
+        "refresh_button": "Шинэчлэх",
+        "refresh_done": "Илгээгчийн дүрсийг дахин татна"
       },
       "show_avatars_in_junk": {
         "label": "Хогийн хавтас дахь аватаруудыг харуулах",
diff --git a/locales/nb/common.json b/locales/nb/common.json
index 6726269d1..65b65dd22 100644
--- a/locales/nb/common.json
+++ b/locales/nb/common.json
@@ -2094,7 +2094,11 @@
       },
       "sender_favicons": {
         "label": "Nettstedsikoner for avsendere",
-        "description": "Vis nettstedsikoner som profilbilder for bedriftsavsendere"
+        "description": "Vis nettstedsikoner som profilbilder for bedriftsavsendere",
+        "refresh_label": "Oppdater avsenderikoner",
+        "refresh_description": "Hent nettstedikonene på nytt, for eksempel når en avsender har byttet ikon",
+        "refresh_button": "Oppdater",
+        "refresh_done": "Avsenderikonene hentes på nytt"
       },
       "show_avatars_in_junk": {
         "label": "Vis profilbilder i søppelpostmappen",
diff --git a/locales/nl/common.json b/locales/nl/common.json
index 12967b6f8..653b92374 100644
--- a/locales/nl/common.json
+++ b/locales/nl/common.json
@@ -2087,7 +2087,11 @@
       },
       "sender_favicons": {
         "label": "Afzender-favicons",
-        "description": "Toon websitepictogrammen als profielfoto's voor zakelijke afzenders"
+        "description": "Toon websitepictogrammen als profielfoto's voor zakelijke afzenders",
+        "refresh_label": "Afzenderpictogrammen vernieuwen",
+        "refresh_description": "De websitepictogrammen opnieuw ophalen, bijvoorbeeld als een afzender het zijne heeft gewijzigd",
+        "refresh_button": "Vernieuwen",
+        "refresh_done": "Afzenderpictogrammen worden opnieuw opgehaald"
       },
       "show_avatars_in_junk": {
         "label": "Avatars tonen in de map ongewenst",
diff --git a/locales/pl/common.json b/locales/pl/common.json
index 7ec43d247..93918746b 100644
--- a/locales/pl/common.json
+++ b/locales/pl/common.json
@@ -2087,7 +2087,11 @@
       },
       "sender_favicons": {
         "label": "Favikony nadawców",
-        "description": "Pokazuj ikony stron internetowych jako zdjęcia profilowe nadawców firmowych"
+        "description": "Pokazuj ikony stron internetowych jako zdjęcia profilowe nadawców firmowych",
+        "refresh_label": "Odśwież ikony nadawców",
+        "refresh_description": "Pobierz ponownie ikony stron, na przykład gdy nadawca zmienił swoją ikonę",
+        "refresh_button": "Odśwież",
+        "refresh_done": "Ikony nadawców zostaną pobrane ponownie"
       },
       "show_avatars_in_junk": {
         "label": "Pokazuj awatary w folderze spam",
diff --git a/locales/pt/common.json b/locales/pt/common.json
index 15e8e49b8..da81c662a 100644
--- a/locales/pt/common.json
+++ b/locales/pt/common.json
@@ -2087,7 +2087,11 @@
       },
       "sender_favicons": {
         "label": "Favicons de remetente",
-        "description": "Exibir ícones de sites como fotos de perfil para remetentes empresariais"
+        "description": "Exibir ícones de sites como fotos de perfil para remetentes empresariais",
+        "refresh_label": "Atualizar ícones dos remetentes",
+        "refresh_description": "Obter novamente os ícones dos sites, por exemplo quando um remetente alterou o seu",
+        "refresh_button": "Atualizar",
+        "refresh_done": "Os ícones dos remetentes serão obtidos novamente"
       },
       "show_avatars_in_junk": {
         "label": "Mostrar avatares na pasta de spam",
diff --git a/locales/ro/common.json b/locales/ro/common.json
index a281787df..d8ef29c9e 100644
--- a/locales/ro/common.json
+++ b/locales/ro/common.json
@@ -2094,7 +2094,11 @@
       },
       "sender_favicons": {
         "label": "Favicon-uri ale expeditorului",
-        "description": "Afișați pictogramele site-urilor web ca imagini de profil pentru expeditorii de afaceri"
+        "description": "Afișați pictogramele site-urilor web ca imagini de profil pentru expeditorii de afaceri",
+        "refresh_label": "Reîmprospătează pictogramele expeditorilor",
+        "refresh_description": "Descarcă din nou pictogramele site-urilor, de exemplu când un expeditor și-a schimbat pictograma",
+        "refresh_button": "Reîmprospătează",
+        "refresh_done": "Pictogramele expeditorilor vor fi descărcate din nou"
       },
       "show_avatars_in_junk": {
         "label": "Afișați avatarurile din folderul „Junk”",
diff --git a/locales/ru/common.json b/locales/ru/common.json
index 3941e248e..49f609c7a 100644
--- a/locales/ru/common.json
+++ b/locales/ru/common.json
@@ -2087,7 +2087,11 @@
       },
       "sender_favicons": {
         "label": "Фавиконы отправителей",
-        "description": "Показывать иконки сайтов как аватары для корпоративных отправителей"
+        "description": "Показывать иконки сайтов как аватары для корпоративных отправителей",
+        "refresh_label": "Обновить значки отправителей",
+        "refresh_description": "Заново загрузить значки сайтов, например если отправитель сменил свой",
+        "refresh_button": "Обновить",
+        "refresh_done": "Значки отправителей будут загружены заново"
       },
       "show_avatars_in_junk": {
         "label": "Показывать аватары в папке «Спам»",
diff --git a/locales/sk/common.json b/locales/sk/common.json
index 8a7730411..967d8ccce 100644
--- a/locales/sk/common.json
+++ b/locales/sk/common.json
@@ -2094,7 +2094,11 @@
       },
       "sender_favicons": {
         "label": "Favikony odosielateľov",
-        "description": "Zobrazovať ikony webových stránok ako profilové obrázky firemných odosielateľov"
+        "description": "Zobrazovať ikony webových stránok ako profilové obrázky firemných odosielateľov",
+        "refresh_label": "Obnoviť ikony odosielateľov",
+        "refresh_description": "Znova načítať ikony webov, napríklad keď odosielateľ zmenil svoju ikonu",
+        "refresh_button": "Obnoviť",
+        "refresh_done": "Ikony odosielateľov sa načítajú znova"
       },
       "show_avatars_in_junk": {
         "label": "Zobrazovať avatáry v spame",
diff --git a/locales/tr/common.json b/locales/tr/common.json
index 74c700a4e..e360c1795 100644
--- a/locales/tr/common.json
+++ b/locales/tr/common.json
@@ -2087,7 +2087,11 @@
       },
       "sender_favicons": {
         "label": "Gönderici Favorikonları",
-        "description": "İş göndericileri için profil resmi olarak web sitesi simgelerini göster"
+        "description": "İş göndericileri için profil resmi olarak web sitesi simgelerini göster",
+        "refresh_label": "Gönderen simgelerini yenile",
+        "refresh_description": "Web sitesi simgelerini yeniden al, örneğin bir gönderen simgesini değiştirdiğinde",
+        "refresh_button": "Yenile",
+        "refresh_done": "Gönderen simgeleri yeniden alınacak"
       },
       "show_avatars_in_junk": {
         "label": "İstem Dışı Klasöründe Avatarları Göster",
diff --git a/locales/uk/common.json b/locales/uk/common.json
index af5af58f2..70ac98e37 100644
--- a/locales/uk/common.json
+++ b/locales/uk/common.json
@@ -2087,7 +2087,11 @@
       },
       "sender_favicons": {
         "label": "Favicons відправника",
-        "description": "Показувати піктограми веб-сайтів як зображення профілю для бізнес-відправників"
+        "description": "Показувати піктограми веб-сайтів як зображення профілю для бізнес-відправників",
+        "refresh_label": "Оновити значки відправників",
+        "refresh_description": "Заново завантажити значки сайтів, наприклад якщо відправник змінив свій",
+        "refresh_button": "Оновити",
+        "refresh_done": "Значки відправників буде завантажено заново"
       },
       "show_avatars_in_junk": {
         "label": "Показувати аватари в папці «Спам»",
diff --git a/locales/zh-TW/common.json b/locales/zh-TW/common.json
index dbbc098a1..004f12c2d 100644
--- a/locales/zh-TW/common.json
+++ b/locales/zh-TW/common.json
@@ -2094,7 +2094,11 @@
       },
       "sender_favicons": {
         "label": "寄件者圖示",
-        "description": "使用企業寄件者的網站圖示作為頭像"
+        "description": "使用企業寄件者的網站圖示作為頭像",
+        "refresh_label": "重新整理寄件者圖示",
+        "refresh_description": "重新取得網站圖示，例如寄件者更換了圖示時",
+        "refresh_button": "重新整理",
+        "refresh_done": "將重新取得寄件者圖示"
       },
       "show_avatars_in_junk": {
         "label": "在垃圾郵件信件匣顯示頭像",
diff --git a/locales/zh/common.json b/locales/zh/common.json
index 1f3fc3546..1b079b2f4 100644
--- a/locales/zh/common.json
+++ b/locales/zh/common.json
@@ -2087,7 +2087,11 @@
       },
       "sender_favicons": {
         "label": "发件人图标",
-        "description": "使用企业发件人的网站图标作为头像"
+        "description": "使用企业发件人的网站图标作为头像",
+        "refresh_label": "刷新发件人图标",
+        "refresh_description": "重新获取网站图标，例如发件人更换了图标时",
+        "refresh_button": "刷新",
+        "refresh_done": "将重新获取发件人图标"
       },
       "show_avatars_in_junk": {
         "label": "在垃圾邮件文件夹中显示头像",
diff --git a/stores/favicon-refresh-store.ts b/stores/favicon-refresh-store.ts
new file mode 100644
index 000000000..f6087774b
--- /dev/null
+++ b/stores/favicon-refresh-store.ts
@@ -0,0 +1,29 @@
+import { create } from 'zustand';
+import { persist } from 'zustand/middleware';
+
+// Domains whose favicon failed to load in this tab. Avatars skip them so a
+// missing icon isn't requested again on every render.
+export const failedFaviconDomains = new Set<string>();
+
+interface FaviconRefreshState {
+  /** When the user last asked for fresh sender icons (ms), 0 if never. */
+  refreshedAt: number;
+  refresh: () => void;
+}
+
+// Sender favicons are cached for two weeks by the browser and by the
+// /api/favicon proxy. Refreshing stamps a new time that avatars append to the
+// favicon URL (so the browser and any proxy in between miss their cache) and
+// that the route compares against its own cache entry (issue #960).
+export const useFaviconRefreshStore = create<FaviconRefreshState>()(
+  persist(
+    (set) => ({
+      refreshedAt: 0,
+      refresh: () => {
+        failedFaviconDomains.clear();
+        set({ refreshedAt: Date.now() });
+      },
+    }),
+    { name: 'favicon-refresh', partialize: (s) => ({ refreshedAt: s.refreshedAt }) },
+  ),
+);