Emails put in folders keep reappearing in inbox

Question

I have an issue with New Outlook. I save emails into folders/subfolders, but then copies of these emails keep reappearing in the inbox. It is incredibly frustrating and feels like some kind of syncing issue. Can anyone help? Thanks.

Answer 1

The issue you're experiencing with emails reappearing in your inbox after moving them to folders can be related to synchronization problems, especially if you're using a mobile device or a third-party application that interacts with your Exchange Server mailbox. This can lead to unexpected duplication of emails.

To troubleshoot this issue, consider the following steps:

1. Check Synchronization Settings: Ensure that your Outlook settings are properly configured for synchronization. Sometimes, adjusting these settings can help resolve the issue.
2. Review Third-Party Applications: If you have any third-party applications or mobile devices that sync with your mailbox, they might be causing the duplication. Try disabling them temporarily to see if the issue persists.
3. Mailbox Maintenance: Occasionally, mailbox maintenance on the Exchange Server can lead to duplication. If this is the case, you might need to consult with your IT department or the service provider managing your Exchange Server.
4. Update Outlook: Ensure that you are using the latest version of Outlook, as updates often contain fixes for known issues.

If the problem continues, you may want to reach out to Microsoft support for further assistance.

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References:

• Remove duplicate folders in Outlook when connected to an Exchange Server mailbox
• Items reappear in a user's mailbox or are duplicated in the archive mailbox when an archiving policy is enabled during IMAP migration
• Only a subset of items are synchronized in shared mailboxes or public folders in Outlook 2016

Answer 2

Hi David Halligan,

Welcome to Microsoft Q&A.

This is usually a sync/mapping loop: the message is moved to a folder, but another device/app (or the server) still thinks it belongs in Inbox, so it “reappears” after syncing.

Quick things to check:

• Rules: New Outlook > Settings (⚙️) > Mail > Rules (also check webmail rules). Anything that moves/copies mail back to Inbox can cause this.
• IMAP Path Prefix / Root folder path: Some IMAP providers need the root mailbox path set correctly (often INBOX) or folder mapping gets messy.
• Mobile “Smart/Focused” inboxes: Phone mail apps can sometimes “correct” moves made on PC.
• Gmail accounts: Gmail uses labels (All Mail/Inbox label behavior), so items may pop back if label changes don’t sync cleanly.

Fast tests to pinpoint the source:

• Web test: Move an email in a browser. If it stays on the web but returns in the app, it’s likely local to New Outlook.
• One-device test: Turn off your phone’s Wi-Fi/data for ~1 hour, then move a few emails on PC. If they stay put, your phone/app is likely putting them back.

Fixes (New Outlook for Windows):

• Remove & re-add the account (resets local cache).
• If you suspect a “stuck” item: Empty Deleted Items, and check Recover items deleted from this folder (Recoverable Items) in case a half-deleted/corrupted item is causing repeated sync attempts.

Please let me know your account type (Outlook.com vs Gmail vs other IMAP) and whether the move “sticks” on the web. Once I have this information, I can narrow this down quickly.

Please let me know if this proves useful to you, or if you would like further assistance.

I'm looking forward to your reply.