diff --git a/e2e/helpers.ts b/e2e/helpers.ts
index e3d251c69..006d20acb 100644
--- a/e2e/helpers.ts
+++ b/e2e/helpers.ts
@@ -42,7 +42,18 @@ export function collectConsole(page: Page): ConsoleCollector {
   const errors: string[] = [];
   const pageErrors: string[] = [];
   page.on('console', (msg) => {
-    if (msg.type() === 'error') errors.push(msg.text());
+    if (msg.type() !== 'error') return;
+    // The login page's registration probe (POST /_matrix/client/v3/register)
+    // answers 403 "Registration has been disabled" on a homeserver with sign-up
+    // closed (matrix.lotusguild.org since 2026-10-16: accounts come from SSO).
+    // Allowed only for that URL so any other 403 still fails the test.
+    if (
+      /status of 403/.test(msg.text()) &&
+      /\/_matrix\/client\/v3\/register/.test(msg.location().url)
+    ) {
+      return;
+    }
+    errors.push(msg.text());
   });
   page.on('pageerror', (err) => {
     pageErrors.push(err.message);
diff --git a/src/app/utils/linkSafety.test.ts b/src/app/utils/linkSafety.test.ts
index aaaad5ea9..7bd2f8a72 100644
--- a/src/app/utils/linkSafety.test.ts
+++ b/src/app/utils/linkSafety.test.ts
@@ -38,3 +38,38 @@ test('hostFromText only accepts URL/host-shaped text; IDN becomes punycode', ()
   assert.equal(analyzeLink('paypal.com', 'https://xn--pypal-4ve.com/')?.punycode, true);
   assert.equal(analyzeLink('paypal.com', 'https://xn--pypal-4ve.com/')?.mismatch, true);
 });
+
+test('a trusted name inside a sentence still exposes a different destination (#335)', () => {
+  const a = analyzeLink('Log in at chat.lotusguild.org', 'https://evil.example/');
+  assert.equal(a?.mismatch, true);
+  assert.equal(a?.shownHost, 'chat.lotusguild.org');
+  assert.equal(
+    analyzeLink('chat.lotusguild.org (official)', 'https://evil.example/')?.mismatch,
+    true,
+  );
+  assert.equal(
+    analyzeLink('Open https://paypal.com/login now', 'https://evil.example/')?.mismatch,
+    true,
+  );
+  // honest sentences are not flagged
+  assert.equal(
+    analyzeLink('Log in at chat.lotusguild.org', 'https://chat.lotusguild.org/login')?.mismatch,
+    false,
+  );
+  assert.equal(analyzeLink('read the docs', 'https://evil.example/')?.mismatch, false);
+  assert.equal(analyzeLink('see main.py and report.pdf', 'https://github.com/x')?.mismatch, false);
+  assert.equal(analyzeLink('release v1.2.3 notes', 'https://github.com/x')?.mismatch, false);
+});
+
+test('shared hosting suffixes are separate sites (#335)', () => {
+  assert.equal(registrableDomain('alice.github.io'), 'alice.github.io');
+  assert.equal(registrableDomain('www.alice.github.io'), 'alice.github.io');
+  assert.equal(registrableDomain('bucket.s3.amazonaws.com'), 'bucket.s3.amazonaws.com');
+  assert.equal(analyzeLink('alice.github.io', 'https://evil.github.io/')?.mismatch, true);
+  assert.equal(analyzeLink('lotusguild.pages.dev', 'https://evil.pages.dev/')?.mismatch, true);
+  assert.equal(
+    analyzeLink('alice.github.io/blog', 'https://alice.github.io/blog/1')?.mismatch,
+    false,
+  );
+  assert.equal(registrableDomain('news.bbc.co.uk'), 'bbc.co.uk');
+});
diff --git a/src/app/utils/linkSafety.ts b/src/app/utils/linkSafety.ts
index 6a2682167..a6026a935 100644
--- a/src/app/utils/linkSafety.ts
+++ b/src/app/utils/linkSafety.ts
@@ -48,11 +48,53 @@ const TWO_LABEL_SUFFIXES = new Set([
   'com.tw',
 ]);
 
+// [Gitea #335] Shared-hosting suffixes (the Public Suffix List's "private"
+// section, the ones phishing actually uses): every customer gets their own
+// subdomain, so `alice.github.io` and `evil.github.io` are different sites.
+// A curated list rather than the full PSL keeps this out of the bundle budget.
+const SHARED_HOSTING_SUFFIXES = new Set([
+  'github.io',
+  'gitlab.io',
+  'codeberg.page',
+  'pages.dev',
+  'workers.dev',
+  'trycloudflare.com',
+  'netlify.app',
+  'vercel.app',
+  'web.app',
+  'firebaseapp.com',
+  'appspot.com',
+  'herokuapp.com',
+  'onrender.com',
+  'fly.dev',
+  'glitch.me',
+  'replit.app',
+  'repl.co',
+  'surge.sh',
+  'blogspot.com',
+  'wordpress.com',
+  'wixsite.com',
+  'weebly.com',
+  'azurewebsites.net',
+  'cloudfront.net',
+  'ngrok.io',
+  'ngrok-free.app',
+  'duckdns.org',
+  's3.amazonaws.com',
+]);
+
+const isPublicSuffix = (suffix: string): boolean =>
+  TWO_LABEL_SUFFIXES.has(suffix) || SHARED_HOSTING_SUFFIXES.has(suffix);
+
 export const registrableDomain = (host: string): string => {
   const labels = host.toLowerCase().replace(/\.$/, '').split('.');
-  if (labels.length <= 2) return labels.join('.');
-  const lastTwo = labels.slice(-2).join('.');
-  return TWO_LABEL_SUFFIXES.has(lastTwo) ? labels.slice(-3).join('.') : lastTwo;
+  // Longest matching public suffix wins (3 labels, e.g. s3.amazonaws.com, then 2).
+  for (const n of [3, 2]) {
+    if (labels.length > n && isPublicSuffix(labels.slice(-n).join('.'))) {
+      return labels.slice(-(n + 1)).join('.');
+    }
+  }
+  return labels.slice(-2).join('.');
 };
 
 const HOST_LIKE =
@@ -72,6 +114,85 @@ export const hostFromText = (text: string): string | null => {
   }
 };
 
+// Words that look like hosts but are usually files or versions in chat
+// ("see main.py", "report.pdf", "v1.2.3"): skipped inside sentences unless
+// written as a URL (scheme, www., or a path) so ordinary links aren't flagged.
+const FILE_EXTENSIONS = new Set([
+  'py',
+  'sh',
+  'md',
+  'rs',
+  'js',
+  'ts',
+  'tsx',
+  'jsx',
+  'json',
+  'yaml',
+  'yml',
+  'toml',
+  'txt',
+  'log',
+  'csv',
+  'pdf',
+  'zip',
+  'gz',
+  'tar',
+  'png',
+  'jpg',
+  'jpeg',
+  'gif',
+  'webp',
+  'svg',
+  'mp3',
+  'mp4',
+  'mov',
+  'html',
+  'htm',
+  'css',
+  'exe',
+  'dll',
+  'lock',
+  'cfg',
+  'conf',
+  'ini',
+  'xml',
+  'doc',
+  'docx',
+  'xls',
+  'xlsx',
+  'ppt',
+  'pptx',
+  'apk',
+  'iso',
+  'jar',
+  'java',
+  'go',
+  'rb',
+  'php',
+  'c',
+  'h',
+  'cpp',
+]);
+const TRIM_PUNCT = /^[\s"'“”‘’«»([{<]+|[\s"'“”‘’«»)\]}>.,;:!?]+$/g;
+
+/** Every host a sentence names (Gitea #335), e.g. "Log in at chat.lotusguild.org". */
+export const hostsFromText = (text: string): string[] => {
+  const hosts: string[] = [];
+  text.split(/\s+/).forEach((raw) => {
+    const word = raw.replace(TRIM_PUNCT, '');
+    const host = word && hostFromText(word);
+    if (!host) return;
+    const tld = host.split('.').pop() ?? '';
+    if (!/[a-z]/i.test(tld)) return; // version numbers, IPs-as-words
+    const urlShaped =
+      /^[a-z][a-z0-9+.-]*:\/\//i.test(word) || /^www\./i.test(word) || word.includes('/');
+    if (!urlShaped && host.split('.').length === 2 && FILE_EXTENSIONS.has(tld.toLowerCase()))
+      return;
+    if (!hosts.includes(host)) hosts.push(host);
+  });
+  return hosts;
+};
+
 export type LinkSafety = {
   /** The visible text names a different site than the destination. */
   mismatch: boolean;
@@ -92,8 +213,11 @@ export const analyzeLink = (text: string, href: string): LinkSafety | null => {
   if (url.hostname === 'matrix.to') return null;
   const realHost = url.hostname;
   const punycode = realHost.split('.').some((l) => l.startsWith('xn--'));
-  const shownHost = hostFromText(text) ?? undefined;
-  const mismatch =
-    shownHost !== undefined && registrableDomain(shownHost) !== registrableDomain(realHost);
-  return { mismatch, shownHost, realHost, punycode };
+  // A single URL/host-shaped text, or (Gitea #335) host-shaped words inside a
+  // sentence: "Log in at chat.lotusguild.org" must not hide a different site.
+  const single = hostFromText(text);
+  const shown = single ? [single] : hostsFromText(text);
+  const realSite = registrableDomain(realHost);
+  const other = shown.find((h) => registrableDomain(h) !== realSite);
+  return { mismatch: other !== undefined, shownHost: other ?? shown[0], realHost, punycode };
 };