outlook stopped receiving e-mails

Question

my outlook 365 stopped receiving e-mails. It can send, but not receive. This occurs on both desktop version and on web version

Answer 1

Dear @James Massa, 

Thank you for posting your question in the Microsoft Q&A forum.   

I understand how disruptive it is when Outlook suddenly stops receiving emails, especially when it affects both the desktop application and Outlook on the web. 

There are several common reasons why Outlook may be able to send emails but not receive them. These include reaching your mailbox or cloud storage quota, messages being redirected by filters or rules, security or quarantine actions or a tenant level configuration issue. 

To help me better understand the situation and assist you effectively, could you please share a few details such as:    

1/ When the issue occurs, do you see any error message or error code? If so, please provide it. If you share a screenshot, kindly blur or cover any personal or sensitive information. 

2/ Have any of your colleagues experienced the same issue? 

This will help us better understand the context and provide more targeted support. Any additional information will help us better understand and support you.     

Please see the following workarounds that will help you verify the issue:  

Option 1: Check mailbox or cloud storage 

Open Outlook on the web or the new Outlook > Go to Settings > Select Account > Open Storage to review usage. 

Clean large folders like Deleted Items, Junk Email and Sent Items. 

Permanently delete items using Shift + Delete. 

Option 2: Review Focused Inbox and Junk Email 

Check if Focused Inbox is enabled. 

Look in the Other tab for missing messages. 

Temporarily turn off Focused Inbox if needed. 

Review Junk Email and blocked or safe sender lists. 

Option 3: Ask your IT administrator to verify tenant settings 

Note: Only an IT administrator has permission to perform these steps. 

• Verify license: 

Open Microsoft 365 Admin Center > Users > Active users > Locate your account and check your assigned license. 

• Run a message trace: 

Open Exchange Admin Center > Go to Mail flow > Select Message trace > Search for a recent incoming message > Review its status. 

• Review quarantine: 

Open Microsoft Defender portal > Go to Email and collaboration > Select Review > Open Quarantine > Filter by your mailbox > Release or allow messages. 

• Check mailbox usage and archiving: 

Open Microsoft 365 Admin Center > Go to Reports > Select Usage > Open Mailbox usage > Enable Archive mailbox or adjust license if near quota. 

Additional information is available in the following resources: 
Focused Inbox for Outlook - Microsoft Support 

Manage email messages by using rules in Outlook - Microsoft Support 

Find and release quarantined messages as a user - Microsoft Defender for Office 365 | Microsoft Lea… 

Message trace in the new EAC in Exchange Online | Microsoft Learn 

Microsoft 365 admin center mailbox usage reports - Microsoft 365 admin | Microsoft Learn 

Troubleshoot mail flow in Exchange Online | Microsoft Learn 

Option 4: Contact Microsoft Support 

If the issue persists after completing the steps above, I sincerely recommend reaching out to your IT administrator to create a support ticket via Microsoft 365 Admin Center > Support > Help & Support for further investigation. 

A technical support engineer can perform a remote session to investigate the situation, verify the backend configurations, and run any necessary synchronization tools to resolve the problem. If the issue requires further attention, they can escalate it to a specialized team for deeper analysis.     

As community moderators, we kindly ask for your understanding that our access to internal development details is limited. Our primary role is to guide users toward the appropriate resources and support channels. While we may not have visibility into performing deeper backend analysis, we’ll continue doing our best to support you within the scope of our responsibilities.  

I hope this information is helpful. If you have any questions or need further support, please don’t hesitate to reach out at any time. 

Thank you for your patience and understanding. 

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