There are several reasons that leads to the issue related to Yahoo mail not updating issue. If you want to know about how to resolve Yahoo mail not updating issue then you need to follow some specific steps. To resolve the issue, you need to make sure that the device is updated with latest version and if you are using a web browser like Safari then make sure that the browser is properly updated. After that, log into Yahoo mail and make sure that account is active and password is correct. Also, check whether are settings are correct by using the mail settings lookup.