1. Update your email client software to the latest version.
2. Clear the cache and cookies in your web browser.
3. Check the settings in your email client and confirm your preferences.
4. Check to see if you have any browser add-ons or extensions that could be causing the issue.
5. Refresh your inbox and check for email synchronization.

If none of these steps resolve your issue with emails being marked as read when they haven’t been opened, you should contact your email provider.