Скачать или смотреть How to stop NDR errors when users report emails as Not Junk in Microsoft 365

How to stop NDR errors when users report emails as Not Junk in Microsoft 365

How to stop NDR errors when users report emails as Not Junk in Microsoft 365

Are you struggling with Non-Delivery Reports (NDR) when your users try to report emails as Not Junk in Microsoft 365? This comprehensive guide shows you how to fix Microsoft 365 NDR errors, resolve email reporting issues, and get your "Not Junk" submissions working smoothly again. Whether you’re facing Exchange Online reporting failures, "Access Denied" NDRs, or Microsoft Defender for Office 365 configuration errors, we walk you through troubleshooting steps, including adjusting user submission settings, configuring outbound spam policies, checking transport rules, and verifying administrative permissions. This step-by-step solution helps you fix reporting problems for tenant mailboxes, ensure false positives are correctly analyzed, and prevent future NDR errors during the email reporting process.

In This Video We Will See How to Stop NDR Errors When Users Report Emails as Not Junk in Microsoft 365

Here Are The Steps to Stop NDR Errors When Users Report Emails as Not Junk in Microsoft 365

Method 1: Configure User Submission Settings

1. Log in to the Microsoft Defender portal (https://www.google.com/search?q=secur...)
2. In the left-hand menu, click on "Settings"
3. Select "Email & collaboration"
4. Click on "User submissions"
5. Ensure "Microsoft Outlook" is selected as the reporting tool
6. Under "Reported message destinations," verify the "Send reported messages to" settings
7. Check the "Notifications" tab to ensure users receive proper feedback
8. Click "Save"
9. Done!

Method 2: Adjust Outbound Spam Policies

1. In the Microsoft Defender portal, go to "Policies & rules"
2. Click on "Threat policies"
3. Select "Anti-spam" under the Policies section
4. Click on "Anti-spam outbound policy (Default)"
5. Scroll down to "Protection settings"
6. Ensure "Automatic forwarding rules" is set to "On - Forwarding is enabled" if reporting to an external address
7. Review the "Recipient limits" to ensure reporting traffic isn't being throttled
8. Click "Save"
9. Done!

Method 3: Check Exchange Transport Rules (Mail Flow Rules)

1. Open the Exchange Admin Center (EAC)
2. Navigate to "Mail flow" and click "Rules"
3. Search for any rules that might be blocking internal messages sent to "[email protected]" or "[email protected]"
4. If a rule is found, add an exception for "The sender is..." or "The recipient is..."
5. Ensure no "Do not forward" or "Block" actions are being applied to reporting addresses
6. Save the rule changes
7. Restart your Outlook client to test
8. Done!

Method 4: Verify Admin Submission Mailbox

1. In the Microsoft Defender portal, go to "Submissions"
2. Click on the "User reported" tab
3. Click "Settings" at the top right
4. Ensure the "Custom mailbox" (if used) is not full or restricted by a size limit
5. Verify the mailbox has the necessary permissions to receive reports from all users
6. Send a test "Not Junk" report from a user account
7. Monitor for any bounce-back messages
8. Done!

Topic Covered:
Microsoft 365 NDR error fix, stop email reporting NDR, Not Junk reporting failed, Microsoft Defender for Office 365 submissions, Exchange Online NDR troubleshooting, fix user submission errors, Outlook Not Junk error, Microsoft 365 email flow fix, resolve reporting NDR, how to stop Not Junk bounce back, M365 admin submission guide, fix false positive reporting, Exchange transport rules for reporting, anti-spam policy configuration, Microsoft 365 mail flow rules, user reported message settings, resolve access denied NDR, M365 security portal settings, troubleshoot email submissions, fix Microsoft 365 junk mail reporting, stop NDR errors in Outlook.