Gmail Not Receiving Emails: Full Fix Checklist

Missing Gmail is almost never a Google outage. The usual suspects are a filter quietly archiving or deleting mail, a full Google Account storage quota, a forwarding rule sending messages elsewhere, a blocked sender, or a sync problem in a desktop client or the mobile app. Work through the checklist below in order, and check the symptom-to-fix table if you already know how the problem shows up.

Symptom, Cause, and Fix#

Symptom	Likely cause	Fix
A specific sender’s mail never shows up	Message landed in Spam, or the sender is blocked	Check Spam; open Filters and Blocked Addresses to unblock
New mail appears, then disappears	A filter auto-archives or deletes matching messages	Edit or delete the filter in Filters and Blocked Addresses
Nothing new arrives, and your own sent mail bounces	Google Account storage is full (15 GB shared)	Free up space at one.google.com/storage
Mail seems to vanish entirely	Auto-forwarding is silently redirecting it	Settings > Forwarding and POP/IMAP > check the forwarding address
Outlook, Apple Mail, or Thunderbird gets nothing new	Wrong IMAP/POP settings or an outdated password	Recheck server settings and sign-in method
Browser inbox is current, phone is not	The Gmail app has stopped syncing	Check the Sync Gmail toggle and device storage

Check Spam, All Mail, and Your Filters First#

Open the Spam folder from the left sidebar (click More if it’s hidden) and search for the missing message. Gmail’s spam filter is generally reliable, but it does misfire on cold outreach, invoices from new senders, and anything with unusual formatting. If it’s there, open it and click Not spam so future mail from that address lands in the inbox.

If it isn’t in Spam, a filter may be quietly handling it. Go to Settings (gear icon) > See all settings > Filters and Blocked Addresses. Filters can apply a label, skip the inbox, archive, or delete matching mail automatically, and it’s easy to forget one you set up months ago for a different reason. Edit or delete anything that matches the sender or subject you’re missing. It’s worth doing this check periodically anyway, since the same filters can also hide phishing emails you actually want to see and act on.

A Full Google Account Blocks New Mail Entirely#

Gmail, Google Drive, and Google Photos share one 15 GB storage pool on a free account. Once you hit that limit, Google will not deliver new mail to you at all, and anything sent to your address bounces back to the sender. This is the cause people miss most often because Gmail itself still looks and opens normally.

Check your usage at one.google.com/storage. If you’re at or near 15 GB, empty the Gmail Trash and Spam folders (both auto-empty after 30 days, but emptying manually is instant), search has:attachment larger:10M to find and delete oversized emails, and clear out large files or duplicates in Drive and Photos. Storage counts can take up to a day or two to refresh after a cleanup, so give it time before assuming the fix didn’t work. A paid Google One plan is the other option if you’d rather not delete anything.

Forwarding Rules and a Blocked Sender List#

Under Settings > See all settings > Forwarding and POP/IMAP, check whether “Forward a copy of incoming mail to” is turned on. Gmail allows only one forwarding address, and it silently sends nearly all new mail there except what lands in Spam — so if someone else set it up, or you enabled it once and forgot, your inbox can look empty while the real mail is elsewhere.

The Filters and Blocked Addresses tab also lists every sender you’ve blocked. Select any you no longer want blocked and click Unblock selected addresses; you can also open a message from that sender and unblock them directly from the More menu next to Reply.

POP and IMAP Client Problems#

If Gmail’s own inbox has the message but Outlook, Apple Mail, or Thunderbird doesn’t, the problem is on the client side. As of January 2025 Google removed the separate Enable IMAP/Disable IMAP toggle — IMAP access is simply always on for Gmail accounts — so there’s no setting to check there. What still matters is the server configuration: imap.gmail.com on port 993 with SSL, matching Google’s recommended IMAP settings.

Authentication is the more common culprit. If two-factor authentication is on for your account, older clients that don’t support signing in with Google need an app password instead of your normal one. If you use POP instead of IMAP, open Forwarding and POP/IMAP and confirm “Archive Gmail’s copy” or “Delete Gmail’s copy” isn’t checked, since either setting can pull messages out of Gmail as soon as your client downloads them. For the specific sync error codes some of these clients throw, see our guide to Outlook, Gmail, and Yahoo sync error 0x800CCC0E.

Fix Sync on the Gmail Mobile App#

When the web inbox is current but the phone isn’t, start inside the Gmail app: tap the menu, Settings, your account, then confirm Sync Gmail is checked under Data usage. Next check that your device itself has free storage, since Android stops syncing apps when storage runs critically low, and a full phone can affect the same apps that need to clear their cache to keep working properly.

On Android, also confirm account sync is enabled at the system level: open Settings, search for Accounts, select your Google account, and make sure sync is turned on. A weak or no internet connection will produce the same symptom, so test another app before assuming it’s Gmail-specific. If nothing else works, clearing the Gmail app’s cache (Settings > Apps > Gmail > Storage & cache > Clear cache, not Clear storage, which also wipes drafts and signatures) resolves most stubborn sync failures.

Work through these in order — Spam and filters first, then storage, then forwarding and blocked senders, then client or app sync — and the missing mail almost always turns up in one of them. If everything checks out and mail is still missing, Google’s own Gmail Help Center has account-specific troubleshooters for cases tied to a suspended or compromised account.