Gmail account not receiving emails — the full fix guide (2026)

I had this exact issue on a client’s Google Workspace account two months ago — a director’s Gmail had stopped receiving messages from a single supplier for nine days. The Workspace dashboard was green. Spam was empty. The filter list looked clean. The cause, when we finally found it: a forwarding rule the director had set in 2022 to send all messages from that supplier to a now-defunct iCloud address, which bounced back and looped. The fix took 30 seconds once we knew where to look. This guide is the triage sequence I use on every “Gmail not receiving” support ticket — five minutes, in order, covers 95% of cases.

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TL;DR — Most common causes & quickest fix

When a Gmail account stops receiving emails, the cause is almost always one of five things: storage full (15 GB Google quota at 100%), a filter auto-archiving or deleting incoming mail, a forwarding rule pointing to a broken address, an attacker who silently set forwarding after a compromise, or a Google-wide outage. Run the 60-second triage below in order — storage first, because it is the most common single cause and it is the only one Google does not flag visibly in the inbox.

Fastest possible fix: open one.google.com/storage, check the bar. If full, search Gmail for has:attachment larger:10M and delete what you don’t need. New mail will start arriving within minutes once storage drops below 100%. If storage is fine, move down the triage list.

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Quick diagnostic checklist (5-step triage)

This sequence covers 95% of “Gmail not receiving” cases in five minutes. Do it in order — the cheap checks first.

#	Check	Where	What you’re looking for
1	Storage	one.google.com/storage	Bar at 100% or near — quota exceeded
2	Spam folder	Gmail → Spam	Expected emails landing in Spam (search in:spam)
3	Filters	Settings → Filters and Blocked Addresses	Any rule with “Delete it” or “Skip Inbox” matching incoming mail
4	Forwarding & POP/IMAP	Settings → Forwarding and POP/IMAP	Unexpected forwarding address; “Delete Gmail’s copy” set
5	Google outage	google.com/appsstatus/dashboard	Active Gmail incident on the timeline

If all five clear, the issue is on the sender’s side — see the dedicated section below. As of May 2026 the Workspace Status Dashboard listed an ongoing Gmail incident that started on 6 May 2026, so step 5 is not theoretical — major Gmail outages happen multiple times a year.

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Cause 1: Google storage is full (15 GB shared quota)

Google gives every free account 15 GB of storage shared across Gmail, Google Drive, and Google Photos. When that quota hits 100%, Gmail stops accepting new messages. Senders receive a bounce back. There is no in-inbox warning that this is happening — Google’s own help docs confirm this is the first thing to check when messages go missing.

How to check storage

1. Go to one.google.com/storage while signed into the affected account.
2. The page shows a colored bar with three segments: Gmail (red), Drive (blue), Photos (yellow).
3. The total below the bar shows your usage out of 15 GB (free) or your Google One quota (paid).

If the bar is at or near 100%, this is your problem.

How to free Gmail space fast

Use Gmail search to find the largest items:

• has:attachment larger:10M — emails with attachments over 10 MB
• has:attachment larger:25M — over 25 MB (Gmail’s send limit)
• older_than:5y — anything older than 5 years
• from:newsletter@ or category:promotions — bulk promo mail

Select the results, Delete, then empty Trash — files in Trash still count against the quota for 30 days unless you manually empty it. For Google Drive, sort by Size at drive.google.com and delete or move large files.

When to upgrade

If your account is heavily used for work and you cannot reasonably trim 15 GB, Google One starts at 100 GB for around $1.99/month or $19.99/year. For a Workspace account, your admin controls quota — ask them to increase your allocation or migrate you to a higher SKU.

One quirk: even after you free space, it can take up to an hour for incoming mail to resume. If senders are bouncing right now, ask them to retry — most mail servers automatically retry for 24-72 hours.

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Cause 2: Aggressive filters auto-archiving or deleting

Gmail filters can apply “Skip Inbox”, “Delete it”, or “Mark as read” to incoming messages — and once set, they run silently. A filter you forgot you created two years ago is one of the most common reasons a single sender’s mail seems to vanish.

Audit your filter list

1. In Gmail, click the gear icon (top-right) → See all settings.
2. Open the Filters and Blocked Addresses tab.
3. Read every filter — pay attention to ones with these actions in the right column:
   • Delete it — the message goes straight to Trash and is permanently deleted after 30 days.
   • Skip the Inbox (Archive it) — the message exists in All Mail but never appears in the inbox.
   • Forward to — the message is sent elsewhere.
   • Apply label “Trash” — same as delete.

For each suspicious filter, click edit to see the matching criteria (e.g., from:supplier@example.com), then delete the filter if it’s wrong.

Search for archived mail

If you suspect a filter has been archiving messages, search:

• from:supplier@example.com in:anywhere — finds the message anywhere, including Archived
• is:archived from:supplier@example.com — explicit archived filter
• label:trash from:supplier@example.com — in Trash before 30-day deletion

Our Gmail search operators complete list covers every operator including the lesser-known has:userlabels and category: modifiers useful for diagnosing filter behavior.

Blocked addresses

In the same Filters tab, scroll to Blocked addresses at the bottom. Blocked addresses go straight to Spam. If you blocked someone in the past and now expect mail from them, unblock here.

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Cause 3: Forwarding loop or wrong forwarding address

If your Gmail forwards incoming mail to another address that doesn’t exist anymore — an old work account, a closed iCloud, a decommissioned Yahoo — the message can bounce back, loop, or be silently dropped depending on the destination’s bounce behavior. Forwarding misconfiguration was the actual cause of the client incident I opened this guide with.

Check forwarding settings

1. Settings (gear icon) → See all settings → Forwarding and POP/IMAP tab.
2. Look at the Forwarding section at the top. Possible states:
   • Disable forwarding — no forwarding active (good if you didn’t intend any).
   • Forward a copy of incoming mail to [address] — actively forwarding. Verify the address is one you control and is working.
   • The dropdown next to the address controls what happens to Gmail’s copy: Keep Gmail’s copy in the Inbox (safe), Mark Gmail’s copy as read, Archive Gmail’s copy, or Delete Gmail’s copy (dangerous if forwarding is broken).

If “Delete Gmail’s copy” is set and forwarding is broken

This is the worst-case combination: every incoming message is sent to a dead address AND deleted from your inbox. Switch to Keep Gmail’s copy in the Inbox immediately, then either fix the forwarding address or disable forwarding entirely.

Filter-based forwarding

Forwarding can also happen at the filter level (a filter with “Forward to” action). Check the Filters tab and look at every filter’s actions — a filter forwarding to a broken address bypasses the main Forwarding settings entirely.

POP and IMAP

If you connect Gmail to a desktop client (Outlook, Apple Mail, Thunderbird) over POP, the client may be downloading and deleting messages from Gmail’s server. Check the client’s account settings — for POP, set “Leave a copy on the server”; in Gmail, Settings → Forwarding and POP/IMAP → POP Download → “Keep Gmail’s copy in the Inbox”.

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Cause 4: Account compromised — attacker-set forwarding

An attacker who briefly accessed your Google account can set up silent mail interception in under a minute: add their address to forwarding, add a filter that deletes everything after forwarding so you never see a notification, then sign out. If your Gmail “suddenly” stops receiving expected mail and you can’t explain it through storage, filters, or your own forwarding rules, treat compromise as a real possibility.

Security audit (5 minutes)

1. Recent security activity: go to myaccount.google.com/security → Recent security activity. Look for sign-ins from cities, countries, or devices that aren’t yours.
2. Your devices: in the same Security page, click Manage all devices. Sign out any device you don’t recognize.
3. App passwords and connected apps: still in Security, scroll to Third-party apps with account access — revoke anything unfamiliar. Also check App passwords (only visible if 2FA is on) for entries you didn’t create.
4. Forwarding addresses: re-check Settings → Forwarding and POP/IMAP for addresses you don’t own.
5. Filters: re-check Settings → Filters for any rule that forwards-then-deletes (the classic interception pattern is from:* → forward to attacker@ → delete it).

If you find evidence of compromise

• Change your password immediately — see our Gmail password change guide for the full reset flow including recovery options.
• Enable 2-Step Verification if it wasn’t on, or rotate it if it was on (an attacker with session access may have approved a passkey).
• Revoke all app passwords.
• Sign out all sessions via Manage all devices.
• Run Google’s Security Checkup at myaccount.google.com/security-checkup.

Compromise via leaked password is more common than people realise — Google publishes that billions of stolen credentials circulate annually. If you reuse passwords across sites, treat every “Gmail not receiving” mystery as a possible breach until you’ve ruled it out.

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Cause 5: Gmail outage — Workspace Status Dashboard

Google operates a public status page that lists active and historical incidents for Gmail and the rest of Google Workspace. If Gmail is down for everyone, the dashboard will say so — there’s no point troubleshooting your account when the service itself is broken.

Where to check

The official URL is google.com/appsstatus/dashboard — this is the Google Workspace Status Dashboard. It shows a colored grid: green = operational, orange = service disruption, red = service outage, for Gmail, Drive, Calendar, Meet, Docs, Sheets and every other Workspace product.

Click any cell to see the incident timeline with timestamps, affected regions, and Google’s most recent update.

As an example: at the time of writing, the dashboard listed an active Gmail incident that began on 6 May 2026 at 16:00 UTC, with the most recent update posted on 16 May 2026 at 02:05 UTC. Outages of this duration are unusual but not rare — Gmail has had measurable downtime in most calendar years.

Cross-check with third-party

If you want a second opinion, Downdetector (downdetector.com/status/gmail) crowdsources user reports. A spike there without anything on Google’s official dashboard usually means a regional or ISP-specific issue rather than a global Gmail outage.

What to do during an outage

Nothing — wait. Outgoing senders’ servers will retry for 24-72 hours. Mail sent during the outage is not lost; it queues at the sender’s server and delivers when Gmail returns. If you urgently need to receive a specific message, ask the sender to use an alternate channel (Slack, SMS) and resend the email later.

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Cause 6: Sender blocked by DMARC, SPF, or blocklist

In February 2024 Google rolled out stricter requirements for bulk senders — anyone sending more than 5,000 messages per day to Gmail addresses must now publish valid SPF, DKIM, and DMARC records or have their messages filtered or rejected. Smaller senders are also affected if their domain reputation is poor or they appear on a major blocklist (Spamhaus, Barracuda).

Symptoms

• Mail from a specific company arrives intermittently or not at all.
• Mail from one specific newsletter you signed up for never reaches the inbox or Spam.
• A colleague’s emails arrive normally on other platforms but not on Gmail.

What to ask the sender

The sender should:

1. Check their bounce reply. When Gmail rejects a message, the sending server gets a non-delivery report (NDR) with a code — often 550-5.7.26 (authentication failed) or 421-4.7.0 (temporary block). Ask the sender to forward you the NDR.
2. Test their domain at Google Postmaster Tools if they send any meaningful volume to Gmail addresses. Postmaster Tools shows authentication status, spam rate, and reputation.
3. Verify SPF, DKIM, DMARC using a free tool like mxtoolbox.com or dmarcian.com. The 2024 enforcement requires DMARC with at least p=none for bulk senders, and Google has signalled that requirements will continue to tighten through 2026.

What you can do on your end

• Add the sender to your contacts — Gmail is much less aggressive with mail from contacts.
• Mark previous messages as “Not spam” if they ended up in Spam — Gmail learns from this.
• Create a filter: from:supplier@example.com → Never send to Spam. This is the most reliable lever you have for a sender Gmail keeps flagging incorrectly.

For full coverage of Gmail’s authentication and deliverability requirements, see Google’s email sender guidelines.

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Cause 7: It’s the sender — ask for the bounce reply

If steps 1-6 all clear, the message was never accepted by Gmail in the first place — meaning the issue is upstream of you. The single most useful piece of information at this point is the sender’s bounce-back email.

Why the bounce matters

When an email cannot be delivered, the sending mail server generates a Delivery Status Notification (DSN) or “bounce” that goes back to the sender’s address. The DSN contains the specific error code that tells you (or them) exactly why delivery failed.

Common Gmail bounce codes:

Code	Meaning	Who fixes it
550-5.1.1	No such user — address mistyped or doesn’t exist	Sender (check the address)
550-5.7.1	Message rejected by content/policy	Sender (rewrite, check links)
550-5.7.26	Authentication failed (SPF/DKIM/DMARC)	Sender (fix DNS)
421-4.7.0	Temporary rate limit or block	Sender (wait, retry)
552-5.2.2	Recipient mailbox full	You (free Gmail storage)
550-5.2.1	Account disabled or doesn’t exist	You (check account status)

If the sender forwards you a 552-5.2.2, you have circular confirmation that Cause 1 (storage full) was the issue all along — even if you thought you had checked.

Ask the sender these three things

1. Forward the bounce-back email they received.
2. Confirm the exact “To:” address they used — typos like gmaill.com or hidden invisible characters from a calendar paste are surprisingly common.
3. Try again after you confirm fixes — many mail servers retry automatically for 24-72 hours, so the message may still arrive on its own.

If the sender used a contact form or marketing platform (Mailchimp, HubSpot, SendGrid), they may need to escalate to that platform’s deliverability team. Platforms with poor reputation can be blocked at the IP level regardless of what their customer does.

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Last resort: unified inbox to avoid Gmail-only issues

If a single Gmail account keeps creating delivery anxiety — important client mail missed because of a filter, a forwarding glitch, or a Workspace outage that took out your only inbox — running a desktop client that pulls from multiple providers (Gmail plus a backup IMAP or Outlook address) gives you redundancy without the friction of constant tab switching.

For more on managing multiple Gmail accounts and the inevitable account-switching friction, our Gmail account switching guide covers every method.

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Sources & references

1. Google Support — “Gmail messages are missing” — official Gmail troubleshooting reference covering storage, filters, forwarding, POP/IMAP. Accessed 2026-05-16. support.google.com/mail/answer/7015314
2. Google Workspace Status Dashboard — official live status page for Gmail and all Workspace services. Accessed 2026-05-16; an active Gmail incident was listed from 2026-05-06. google.com/appsstatus/dashboard
3. Google Support — “Email sender guidelines” — February 2024 bulk-sender DMARC/SPF/DKIM enforcement requirements. Accessed 2026-05-16. support.google.com/mail/answer/81126
4. Google Postmaster Tools — sender reputation, authentication status, spam rate diagnostics for domain owners. postmaster.google.com
5. Google One — storage plans and the 15 GB free quota shared across Gmail, Drive, and Photos. one.google.com/about/plans

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Frequently asked questions

Why is my Gmail account suddenly not receiving emails?

The five most common causes, in order of frequency: (1) your Google account storage is at 100% of the 15 GB free quota — Gmail stops accepting new messages until you free space; (2) a filter is auto-archiving or deleting incoming mail; (3) emails are landing in Spam after Google’s 2024 sender authentication tightening; (4) forwarding is misconfigured and looping; (5) a Google Workspace outage. Always start by checking storage at one.google.com/storage.

How do I check if my Gmail storage is full?

Go to one.google.com/storage while signed in. You will see a breakdown across Gmail, Drive, and Photos sharing the same 15 GB free quota. If the bar is at or near 100%, Gmail stops accepting new messages and may bounce them back to senders with a “quota exceeded” error. Free space by deleting large attachments (search has:attachment larger:10M) or large Drive files, or upgrade to Google One.

Could a hacker be silently forwarding my Gmail?

Yes — this is one of the most overlooked causes. An attacker who briefly accessed your account can set a forwarding rule to their own address and a filter that deletes incoming mail so you never notice. Check Settings → Forwarding and POP/IMAP for unfamiliar forwarding addresses, Settings → Filters for delete-on-arrival rules, and myaccount.google.com → Security → Recent security activity for suspicious sign-ins. Change your password and revoke app passwords if anything looks wrong.

How do I know if Gmail itself is down vs my account is broken?

Check the Google Workspace Status Dashboard at google.com/appsstatus/dashboard — it lists active and recent Gmail incidents with timestamps. If there is an active Gmail incident, the issue is server-side and you wait. If the dashboard shows all-green, the issue is specific to your account or your sender’s setup.

Why do some senders’ emails never arrive but others do?

The sender’s domain is failing Google’s authentication requirements — DMARC, SPF, or DKIM. Google tightened bulk-sender enforcement in February 2024: bulk senders without proper DMARC alignment now have messages silently filtered or rejected. Ask the sender to check their bounce reply and verify their domain at Google Postmaster Tools. If they are a small sender, check your Spam folder — their message is likely there.

What’s the fastest 60-second triage when Gmail stops receiving?

Sixty-second triage: (1) one.google.com/storage — is it full? (2) Search in:spam from:[expected sender] — landed in Spam? (3) Settings → Filters — any delete rules? (4) Settings → Forwarding and POP/IMAP — anything unexpected? (5) google.com/appsstatus/dashboard — Gmail outage? If all five clear, ask the sender to forward their bounce message — the issue is on their side.

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Related: Gmail search operators complete list — find any “missing” email with the right query. Gmail keyboard shortcuts list — power-user navigation. Gmail password change guide — reset and account recovery if you suspect compromise. Gmail switch between accounts — managing multiple inboxes.