Gmail serves over 1.8 billion users worldwide, making any outage immediately noticeable. When Gmail stops working, the key question is: is this a Gmail-wide outage, a Google Workspace issue, or a problem specific to your account? This guide walks through systematic diagnosis from most likely cause to least.
How to Check if Gmail is Down (Step by Step)
1. Check the Google Workspace Status Dashboard
Visit workspace.google.com/dashboard/uptime — Google's official status page. It reports status separately for:
- Gmail — web interface, mobile apps, and email delivery
- Google Drive — related to Gmail attachments and Drive sharing
- Google Meet — video calling embedded in Gmail
- Google Calendar — calendar invites sent via Gmail
2. Test from a Different Device or Browser
Open Gmail in an incognito browser window or on a different device. If it loads fine in incognito but not in your regular browser, the issue is a browser extension, cached data, or cookie problem — not a Gmail outage.
3. Check Your Storage Quota
Gmail stops receiving new messages when your Google account storage is full. Free accounts share 15GB across Gmail, Google Drive, and Google Photos. Check your storage at one.google.com/storage. If you're at or near 100%, incoming emails are rejected with a "storage quota exceeded" bounce message to senders.
| Gmail Component | Description | Tier |
|---|---|---|
| Gmail Web Interface | mail.google.com web app for reading and composing email | Core |
| Gmail Mobile (iOS/Android) | Gmail app for iPhone and Android devices | Mobile |
| IMAP Access | Gmail via third-party clients (Outlook, Apple Mail, Thunderbird) | Protocol |
| SMTP Sending | Outbound email via smtp.gmail.com | Protocol |
| Google Workspace Mail | Custom domain email for businesses on Workspace plans | Business |
| Gmail API | REST API for programmatic email access (developers) | Developer |
| Google Meet in Gmail | Video calling integration within Gmail | Integration |
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Free 14-day trial →Why Does Gmail Go Down? Common Causes
- Google Infrastructure Incidents: Gmail runs on Google's global infrastructure. Major Google Cloud Platform incidents can cascade into Gmail availability issues, particularly for Workspace customers.
- Authentication Service Disruptions: Gmail relies on Google's OAuth and account authentication systems. When Google Account sign-in is degraded, Gmail login can fail even if the mail servers are operational.
- IMAP/SMTP Access Changes: Google periodically updates security policies for third-party email clients. Changes to "less secure app access" or OAuth requirements can break IMAP access for Outlook, Apple Mail, and other clients.
- Spam Filter Overloads: During high-volume email campaigns (holidays, product launches), Gmail's spam filtering infrastructure can experience delays, causing legitimate emails to be slow or misclassified.
- Storage System Maintenance: Scheduled Google Storage maintenance can temporarily slow down Gmail attachment access and email indexing.
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If Gmail is working in the web browser but not in Outlook or Apple Mail, the issue is almost always authentication or settings:
Incoming Mail (IMAP): Server: imap.gmail.com Port: 993 Encryption: SSL/TLS Username: your-full-email@gmail.com Outgoing Mail (SMTP): Server: smtp.gmail.com Port: 587 (TLS) or 465 (SSL) Authentication: Required Username: your-full-email@gmail.com If 2FA is enabled: Use App Password instead of your account password Generate at: myaccount.google.com/apppasswords
Gmail Not Sending? Step-by-Step Diagnosis
- Check workspace.google.com/dashboard/uptime — if Gmail shows "Service Disruption", it's a platform issue. Wait.
- Check your Sent folder — if the email is there, Gmail accepted it. The issue is delivery to the recipient's mail server.
- Check for bounce notifications — Gmail sends bounce-back emails for failed deliveries. Look in your inbox for "Delivery Status Notification (Failure)".
- Verify recipient address — typos are the most common cause of failed email delivery.
- Check outgoing SMTP limits — free Gmail limits sending to 500 emails/day; Workspace limits to 2,000/day. Exceeding this causes temporary blocks.
- Clear browser cache — corrupted cache can prevent Gmail from loading the compose window correctly.
What to Do During a Gmail Outage
For Personal Gmail Users:
- Wait — personal Gmail outages typically resolve in under an hour.
- Use the Gmail mobile app as a fallback if the web interface is down.
- Check workspace.google.com/dashboard/uptime for estimated resolution time.
For Google Workspace Business Users:
- Workspace plans include a 99.9% uptime SLA — contact Google Support for credits if downtime exceeds SLA.
- Use Google Admin Console to check per-service health for your domain.
- Communicate outage status to your team via Slack or Google Chat (if that's still up).
- For critical communications, use phone or SMS as a backup channel.
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Try 1Password Free →Gmail Outage History: How Often Does Gmail Go Down?
Gmail's historical availability is excellent for a free service. Major incidents are infrequent:
- December 2020: 5-hour global outage affecting all Google services including Gmail. Root cause: storage quota system failure during authentication process.
- April 2021: IMAP access disruptions affecting third-party email clients.
- Minor incidents occur a few times per year, typically affecting specific regions or features (attachment upload, search indexing) for 30-60 minutes.
Google Workspace Business Starter and higher plans carry a 99.9% monthly uptime SLA — approximately 8.76 hours of allowed downtime per year.
Frequently Asked Questions
Gmail is loading but emails are not coming through — is this an outage?
Not necessarily. Check: (1) Your storage quota at one.google.com/storage — a full inbox silently rejects new mail, (2) Your spam and all-mail folders — Gmail may have misclassified incoming emails, (3) Filters in Settings > See all settings > Filters — they could be archiving or deleting messages automatically, (4) The Google Workspace status dashboard for any delivery disruptions.
How do I get alerted when Gmail goes down?
Subscribe to the Google Workspace Status Dashboard at workspace.google.com/dashboard/uptime via RSS feed or email notifications. For businesses relying on Gmail, consider external email monitoring that sends alerts via SMS or Slack when delivery fails — these work even when Gmail itself is down.
Gmail says "temporary error 500" — what does that mean?
A "temporary error 500" in Gmail is a server-side error on Google's infrastructure. It usually resolves in a few minutes. Try: (1) Refreshing the page, (2) Clearing browser cache and cookies, (3) Trying a different browser, (4) Checking workspace.google.com/dashboard/uptime for a reported incident. If it persists more than 30 minutes and the status page shows no incident, contact Google Support.
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