Send & Receive Issues

Fix Emails Automatically Moving to Junk Folder in Outlook

Maira Mehtab Sep 21, 2026 868 views

Question details

Users are experiencing an issue where legitimate incoming emails are automatically routed to the Junk folder in Outlook. Even after moving them back to the Inbox, they return to Junk and disappear from synced devices.

Product: Microsoft Outlook
Device & OS: not provided
Scenario: Receiving and organizing incoming emails across multiple devices.
Observed behavior: Incoming emails automatically go to the Junk Email folder, disappear from other synced devices, and revert to Junk even after being manually moved to the Inbox.

Before you start

Before making changes to your local app settings, sign in to Outlook on the web to verify if this issue happens across the server or is isolated to your desktop client.

Solution 1Recommended

Verify Settings in Outlook on the Web and Mark as Not Junk

Checking the web version helps determine if the issue is local to the desktop client or server-wide, allowing you to train the spam filter properly.

By accessing your email via the web browser, you bypass any localized glitches occurring on the desktop software.

If the emails are also going to junk on the web, you need to mark them as safe to adjust the server's spam filtering behavior.

Sign in online

Open a web browser and sign in to your email account using Outlook on the web.

Locate the affected messages

Navigate to your Junk Email folder and find the emails that were incorrectly filtered.

Mark as Not Junk

Right-click the email, select 'Mark as Not Junk', and confirm that you want to always trust this sender.

Check Blocked Senders

Go to Settings (the gear icon), select 'Mail', then 'Junk email', and ensure the sender is not accidentally listed under your Blocked Senders list.

Syncing changes: Once the server recognizes the sender as safe, the changes will automatically sync to your desktop and mobile applications.

Solution 2

Review and Disable Conflicting Inbox Rules

Sometimes an accidentally created rule or a compromised setting routes specific emails directly to the Junk folder.

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Frequently Asked Questions

Why do emails keep returning to the Junk folder after I move them?

This usually happens when an active Inbox rule, a strict junk email filter setting, or a conflicting third-party antivirus add-in forces the emails back into the Junk folder automatically upon syncing.

How do I whitelist an email address in the Outlook desktop app?

Go to the Home tab, click the Junk dropdown icon in the Delete group, select 'Junk Email Options', navigate to the 'Safe Senders' tab, and add the specific email address or domain.

Does marking an email as 'Not Junk' apply to all future emails from that sender?

Yes, when you mark a message as 'Not Junk', Outlook typically prompts you to always trust emails from that sender, automatically adding their address to your Safe Senders list for future deliveries.

Can other synced devices cause emails to move to Junk?

Yes. If you access your email on a mobile device or another computer that has aggressive local spam filtering rules, it can independently move the email to Junk, and that action will sync across all your connected devices.

Outlook & Email Problems