If you’re unable to send or receive emails in Microsoft Outlook, the issue may be related to your internet connection, account settings, mailbox storage, or a temporary Microsoft 365 service issue.
Before attempting advanced troubleshooting, try the following recommendations.
Check Your Internet Connection
A stable internet connection is required for Outlook to send and receive email.
Verify that your computer is connected to the internet and that you can access websites before continuing.
Verify Your Email Credentials
If your password has recently changed, Outlook may no longer be able to authenticate your account.
Confirm you’re using the correct email address and password. If Multi-Factor Authentication (MFA) is enabled, complete any required verification prompts.
Check Your Mailbox Storage
A full mailbox may prevent you from sending or receiving new messages.
Delete unnecessary emails or empty your Deleted Items folder if your mailbox has reached its storage limit.
Confirm Outlook Is Online
If Outlook is set to Work Offline, new emails will not be sent or received.
Verify that Outlook is connected and actively syncing with your mailbox.
Try Outlook on the Web
Sign in to Outlook using your web browser.
If email works in Outlook on the web but not in the desktop application, the issue may be related to the Outlook application rather than your Microsoft 365 account.
Restart Outlook
Close Outlook completely and reopen the application.
If the problem continues, restart your computer and try again.
When Additional Troubleshooting May Be Needed
If you’re still unable to send or receive email, the issue may involve:
Additional troubleshooting may be required to identify the root cause.
Need Help?
If Outlook continues to experience email synchronization problems after trying these troubleshooting steps, GZM Enterprises can help.
Our IT support services can diagnose Outlook and Microsoft 365 email issues, identify account or configuration problems, and help restore normal email functionality as quickly as possible.
