(New) Outlook for Windows Not Deleting Emails

If you have further questions, please let me know. Thanks, and keep safe.

Hello,

This is a sync issue, not related to using a local Windows account, since new Outlook relies on your email server; if deleted emails return, the server still has a copy, so Outlook syncs them back:

• Check your account type, IMAP or Exchange sync deletes, POP does not

• Confirm Outlook shows “Up to date” and you have a stable connection

• Delete the email and verify in your email provider’s webmail, if it is still there, it will return

• If the issue continues, remove and re-add the account in new Outlook to refresh sync

If the message is not deleted on the server side, Outlook will keep restoring it.

Using a local Windows account instead of signing into a Microsoft account on the PC does not, by itself, prevent new Outlook for Windows from deleting or syncing messages with the mail server. Deletion behavior is controlled by how the account is set up in Outlook and by the mail provider’s server settings.

When deleted emails keep reappearing, the usual causes are:

1. The account type or setup in Outlook is incorrect, so changes (delete/move) are not syncing properly.
2. The mail provider’s server is configured to keep or restore messages (for example, POP or certain IMAP rules), so items deleted in the client are recreated on the next sync.

To resolve this in new Outlook for Windows, use these steps:

1. Remove and re-add the account in new Outlook
   1. In new Outlook, go to the View tab and select View settings, or go to the File tab → Account info → Accounts → Your accounts.
   2. In Email accounts, find the problematic account and select Manage.
   3. Under Account details, select Remove. This removes the account from Outlook and deletes only the offline cached content on this PC; it does not delete the actual mailbox at the provider.
   4. Add the account again in new Outlook, making sure to choose the correct account type (for example, Outlook.com/Exchange vs IMAP/POP) as required by the provider.
2. If using classic Outlook anywhere in the setup, verify the account type If the same mailbox is also configured in classic Outlook and messages or folders are not syncing correctly, confirm the account type is correct (for example, a Hotmail.com or Live.com address should use Outlook.com as the account type, not Exchange or Microsoft 365). Incorrect account type can cause sync anomalies.
3. If the issue persists only with a specific provider After re-adding the account correctly, if deleted messages still return, check the provider’s webmail or support documentation for:
   • POP vs IMAP behavior (POP often leaves or re-downloads messages).
   • Any server-side rules or retention settings that restore messages to the Inbox.

If none of these steps resolve the problem, contact Outlook.com or Outlook for Windows support directly from within Outlook, or use the Outlook.com Community for additional troubleshooting.

References:

• Add an email account to Outlook for Windows
• Troubleshoot Outlook email setup
• Emails deleted from Outlook.com are reverting back to the Inbox