Missing Gmail emails from Inbox? First, open the Trash folder. If you deleted an email, it stays there for 30 days. Then, check Spam. Gmail may have filtered it wrongly. Look into All Mail to find archived messages. Don’t forget to check the Social and Promotions tabs. Use the Gmail search bar to locate messages with names, dates, or subjects. Still nothing? Clear your browser cache or switch browsers. To avoid losing emails again, use a backup tool. A backup keeps all your emails secure.