Gmail Not Working? 9 Fixes in 10 Minutes (2026)

Quick answer: When Gmail is not working, the fastest fix is to test Gmail on another network/device, then clear Gmail/Google sign-in site data (web) or reset the app’s sync/auth token (mobile).

Most failures come from corrupted cookies/cache, extensions/privacy settings, VPN/DNS/security filtering, or a full Google storage quota—use the checklist to match your symptom to the right fix.

Quick Fix Checklist

Pick what matches what you see, then apply the linked fix below (web or mobile).

• Gmail won’t load / blank page / endless spinner (web): clear site data for mail.google.com + accounts.google.com → then reload.
• Login loop / “cookies disabled” / keeps returning to sign-in: allow cookies for Google sign-in domains and disable strict tracking prevention for Gmail.
• “Temporary Error (404/500)” / “Something went wrong”: test without VPN/security filtering; then clear site data and hard refresh.
• Gmail not sending / stuck in Outbox / delayed delivery: check Google storage, attachment size, and sending limits; then retry from web Gmail.
• Gmail app stuck syncing (Android/iPhone): toggle sync/account, clear cache (Android) or reinstall (iPhone), then re-authenticate.
• Only fails on one Wi‑Fi/network: suspect DNS filtering, router “safe browsing,” or HTTPS inspection.

60-second isolation test (do this first):

• Try Gmail on mobile data (turn off Wi‑Fi). If it works, your Wi‑Fi/VPN/DNS/security filter is the issue.
• Try a different browser profile (not just another tab). If it works, your main profile’s cookies/storage/extensions are the issue.
• Try web Gmail vs app: if web works but app doesn’t, reset app sync/auth; if app works but web doesn’t, fix browser cookies/extensions.

Causes (realistic, not generic)

• Corrupted Google site data: broken cookies/local storage/service worker for mail.google.com or accounts.google.com causes blank inbox, infinite loading, or sign-in loops.
• Extension/script interference: ad blockers, privacy tools, script blockers, password managers, and CRM/email tracking add-ons can block Gmail scripts, XHR calls, or Google auth.
• VPN / antivirus HTTPS scanning / DNS filtering: SSL inspection, “web shield,” Pi-hole/NextDNS/AdGuard rules, or router filtering can block Google endpoints and attachments.
• Browser privacy settings: blocked cookies (including third-party cookie restrictions), strict tracking prevention, or “clear on exit” settings can break Google sign-in and session persistence.
• Account sync/auth token stuck (mobile): Google Play services (Android) or iOS app token issues can leave Gmail stuck on “Syncing…” or not updating.
• Google storage full: a full quota can prevent sending and may disrupt receiving until space is freed.
• IMAP/SMTP client auth changes: Outlook/Apple Mail/Thunderbird may fail after password changes, 2‑Step Verification, or when OAuth/app passwords are required.
• Time/OS certificate issues (edge case): incorrect device time/date or outdated OS certificates can break secure connections to Google services.

Cause	Fastest fix
Corrupted cookies/site storage	Clear site data for mail.google.com + accounts.google.com, then sign in again
Extension blocking Gmail	Test Incognito/Private (extensions off), then disable the offending extension or allowlist Gmail
VPN / HTTPS scanning / DNS filter	Disable VPN + SSL inspection; allowlist Google domains in DNS/security tools
Blocked cookies / strict tracking	Allow cookies for Google sign-in domains; relax tracking prevention for Gmail
Mobile sync token stuck	Toggle sync; clear cache (Android) or reinstall (iPhone); re-add account if needed
Google storage full	Free space at one.google.com/storage, empty Trash, then resend
Mail client auth failure	Re-add account to trigger OAuth; use an App Password if required

Step-by-Step Fix

1) Web Gmail won’t load: clear the exact Google site data that breaks Gmail

This fixes blank pages, endless spinners, UI glitches, and many “Something went wrong” errors without wiping your whole browser history.

• Chrome / Edge: Settings → Privacy and security → Cookies and other site data → See all site data and permissions → remove data for:
  • mail.google.com
  • accounts.google.com
  • google.com (only if the first two don’t fix it)
• Firefox: Settings → Privacy & Security → Cookies and Site Data → Manage Data → remove google.com / mail.google.com entries.
• Close all Gmail tabs → reopen https://mail.google.com/ → sign in.

Advanced (non-obvious) fix: if Gmail loads but behaves “stuck” (buttons don’t respond, inbox doesn’t update), force a clean service worker/cache rebuild by removing site data for mail.google.com specifically (this clears Gmail’s offline cache layer).

2) Hard refresh Gmail (forces fresh scripts)

• Windows: Ctrl + F5 (or Ctrl + Shift + R)
• Mac: Cmd + Shift + R
• If the issue returns after refresh, go back to Step 1 (site data is likely corrupted).

3) Rule out extensions in 2 minutes (no guessing)

• Open Gmail in an Incognito/Private window (most extensions are disabled).
• If Gmail works there, disable extensions in your normal window in this order (test after each):
  • Ad blocker / privacy blocker
  • Script blocker
  • Password manager
  • Email tracking / CRM add-on
• Keep the extension installed but add allowlist rules for mail.google.com and accounts.google.com.

4) Fix sign-in loops and “cookies disabled” (browser privacy settings)

• Make sure you are not blocking all cookies.
• Allow cookies (or add exceptions) for:
  • accounts.google.com
  • mail.google.com
  • googleusercontent.com
  • gstatic.com
• If your browser has strict tracking prevention, set it to standard for Gmail or add a site exception.
• If you use “clear cookies on exit,” add Google domains to the do not clear list (otherwise Gmail may break every restart).

5) Gmail not sending: Outbox, delays, and bounce-backs

• Check Google storage (most common): open https://one.google.com/storage. If full:
  • In Gmail search: has:attachment larger:10M (or larger:5M) and delete large emails you don’t need
  • Empty Trash in Gmail and Drive (space often isn’t freed until Trash is emptied)
  • Retry sending from web Gmail
• Attachment too large: Gmail supports ~25MB attachments; use a Google Drive link for larger files.
• Sending limits hit: if you see “You have reached a limit for sending mail,” stop mail merge/add-ons/automation and wait for the limit window to reset (often within 24 hours).
• Check for a bounce message: open Sent and the message thread; look for a delivery status notification with an error code.
• If only one recipient/domain fails: it’s often the recipient server rejecting mail; the bounce text will say why (blocked, policy, mailbox full).

6) Gmail app not working on Android: cache, sync, and token reset

• Settings → Apps → Gmail → Storage & cache → Clear cache.
• Settings → Passwords & accounts (or Accounts) → Google → Account sync → ensure Gmail is enabled.
• If still stuck: Settings → Apps → Google Play services → Storage & cache → Clear cache.
• Advanced fix (auth token reset): remove and re-add the Google account:
  • Settings → Passwords & accounts → select your Google account → Remove account
  • Restart the phone
  • Add the Google account back → open Gmail and allow time to resync
• Update conflict check: update Gmail, Google Play services, and Android System WebView in the Play Store (WebView issues can break sign-in and embedded web flows).

7) Gmail app not working on iPhone/iPad: refresh account + reinstall if needed

• In Gmail app: profile icon → Manage accounts on this device → toggle the account off/on.
• If it won’t load or won’t sync: delete Gmail → reinstall → sign in again (this resets cached auth state).
• If you use Apple Mail instead: Settings → Apps (or Mail) → Mail → Accounts → Gmail → re-enter password, or remove and re-add the account.
• Edge case: ensure iOS Date & Time is set to automatic; incorrect time can break secure sign-in.

8) VPN/security suite/DNS filtering: stop HTTPS scanning and allowlist Google

If Gmail works on mobile data but not on Wi‑Fi, this is the most likely cause.

• Disable your VPN and retry Gmail.
• In antivirus/security tools, disable features named like:
  • HTTPS scanning / SSL inspection
  • Web Shield / Safe Browsing filtering
  • Network-level ad/tracker blocking
• If you manage DNS (Pi-hole/NextDNS/AdGuard DNS), allowlist:
  • mail.google.com, accounts.google.com
  • *.googleusercontent.com, *.gstatic.com
• Router check: disable “parental controls,” “safe browsing,” or “content filtering” temporarily to confirm.

9) Using Outlook/Apple Mail/Thunderbird? Fix Gmail IMAP/SMTP the right way

• In Gmail (web): Settings → See all settings → Forwarding and POP/IMAP → ensure IMAP is enabled (if you use IMAP).
• Prefer re-adding the account in the mail client to trigger modern Google OAuth sign-in (more reliable than manual passwords).
• If you have 2‑Step Verification and your client can’t do OAuth: Google Account → Security → create an App Password and use it in the client.
• If you recently changed your Google password: remove the account from the client and add it again (old tokens often fail silently).

Still Not Working

If Gmail is still not working after the steps above, use this deeper, support-style checklist to isolate the exact layer that’s failing.

• Check Google’s status: visit the Google Workspace Status Dashboard and look for Gmail incidents. If there’s an outage, local fixes won’t help.
• Test a clean environment:
  • Create a new browser profile (Chrome/Edge) and sign in there (this avoids hidden extension and storage corruption).
  • Try a different browser entirely (Chrome ↔ Firefox ↔ Safari) to confirm it’s browser-specific.
• Network isolation (fast):
  • Try a different network (mobile hotspot). If it works, focus on DNS/router/security filtering.
  • Change DNS temporarily to a known resolver (e.g., Google DNS or Cloudflare) to test whether DNS filtering is blocking Gmail endpoints.
• Account-specific checks:
  • Sign into the same account at https://mail.google.com/mail/u/0/#inbox in a clean profile.
  • Check Filters and Blocked Addresses for rules that archive/delete incoming mail.
  • Check Forwarding settings to ensure mail isn’t being redirected unexpectedly.
• Workspace (work/school) edge cases: admins can restrict IMAP, third-party apps, attachments, or external sending. Test web Gmail; then ask your admin to review Google Workspace Admin → Apps → Google Workspace → Gmail settings and security policies.
• Advanced web troubleshooting (when you need proof):
  • Open browser DevTools → Network tab → reload Gmail and look for requests failing with 401/403 (auth/cookies), 429 (rate limiting), or blocked domains (extensions/DNS).
  • If you see repeated redirects to accounts.google.com, it’s almost always cookies/tracking prevention or corrupted site data.
• Escalation steps:
  • Web: remove site data again, then temporarily disable all extensions and VPN/security filtering and retest.
  • Android: clear Gmail cache → update Gmail/Play services/WebView → remove/re-add Google account.
  • iPhone: reinstall Gmail → re-add the account → update iOS.
  • If you suspect compromise or lockouts: Google Account → Security → review recent activity and sign out of other sessions.
• Collect these details before contacting support/admin:
  • Exact error text (copy/paste) and screenshot
  • Web vs app (or both), and which device/OS/browser version
  • Whether it fails on one network only (Wi‑Fi vs mobile data)
  • Time it started and whether sending, receiving, or login is affected

Workaround while troubleshooting: use Gmail in a clean browser profile at https://mail.google.com/mail/u/0/#inbox or switch to the Gmail mobile app after re-authenticating.

Frequently Asked Questions