Gmail Not Sending Emails in Google Workspace – Causes and Complete Fix

Another frequent issue reported by Google Workspace users is Gmail not sending emails. Messages may remain in the Outbox, fail to deliver, or return bounce errors.

This article explains the possible causes and solutions.

Common Reasons Gmail Cannot Send Emails

1. Internet Connectivity Issue

If your internet connection is unstable, Gmail may fail to send messages.

Check:

• Network connectivity

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• Firewall restrictions

• Corporate proxy settings

2. SMTP Configuration Problems

If Gmail is configured in Outlook or another email client, incorrect SMTP settings may prevent email sending.

Correct SMTP settings:

Server:

smtp.gmail.com

Port:

465 or 587

Encryption:

SSL / TLS

3. Sending Limit Exceeded

Google Workspace has sending limits to prevent spam.

Typical limits include:

• 2000 emails per day

• 500 recipients per email

If limits are exceeded, Gmail may temporarily block sending.

4. Suspicious Account Activity

If Google detects unusual login activity, it may block email sending.

Users may see messages like:

“Your account has been temporarily limited.”

5. DNS or Authentication Issues

Incorrect SPF or DKIM settings can also cause delivery failures.

How to Fix Gmail Sending Problems

Step 1 – Check Internet Connection

Ensure your network connection is stable.

Step 2 – Verify SMTP Settings

Confirm that email clients use the correct SMTP configuration.

Step 3 – Check Gmail Sending Limits

Avoid sending large volumes of emails quickly.

Step 4 – Review Google Admin Security Alerts

Admins can review suspicious login alerts in the Admin Console.

Step 5 – Verify DNS Authentication

Ensure SPF, DKIM, and DMARC are properly configured.

Conclusion

Most Gmail sending issues occur due to SMTP configuration errors, sending limits, or security restrictions. Reviewing these settings usually resolves the problem quickly.

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