Find Duplicate Messages Outlook: Email Cleanup Tool

Key Features

• Free and easy way to find and mark duplicate messages in Outlook folders with flag and/or categories.
• Can find duplicates across folders and storages.
• The whole operation is completely safe, because the utility only marks duplicates without removing them from your mailbox.
• The product provides Outlook add-in and standalone Windows application for your convenience.

Technical Specifications

• **Publisher:** Outlookfreeware.com
• **License:** Freeware
• **Operating System:** Windows 7, Windows 8, Windows 10, Windows 11
• **Last Updated:** October 15, 2025
• **Category:** Email / Misc Email Tools