<p data-start="0" data-end="287">If Outlook is filling up with duplicate emails, the easiest way to remove them is by using a dedicated duplicate remover tool. You can try manual methods like sorting emails by date/subject and deleting duplicates or using "Clean Up" in Outlook, but they don&rsquo;t always catch everything.



<p data-start="289" data-end="632">For a reliable and automatic solution, the <strong data-start="332" data-end="370">SysTools Outlook Duplicate Remover works great. It scans your PST/OST files and removes duplicate emails, contacts, calendars, etc., without affecting original data. You can also choose to compare items across folders and apply filters for specific dates &mdash; making the cleanup fast and accurate.