For Yahoo Mail users’ convenience, Yahoo’s conversation feature groups together conversations by topics so that it will be easy for the user to track threads of conversations on the same topic or with the same person. One can open one email and see the exchange of conversation with the other person way back to the time that the first email was sent. This means that if you are looking for information mentioned by you or the other person, you can easily find it. However, if someone else gets to open your Yahoo mails, it will also be easy for him to find whatever information he is looking for because conversations are already grouped.
To prevent the threads of conversations from showing up, you should turn off the conversation option. You can do this by clicking the gear icon on the top right portion of your Yahoo mail page. Then, click “settings”, then click “viewing email”. The disable and enable options will appear. Check “disable” to turn it off. Once you have done this, your conversation threads will stop from showing. This means that if ever someone opens your Yahoo mail, they cannot easily see all conversation from past to present. Still having trouble? visit Yahoo Support Australia and tell us your email issues.