Notifications are crucial, particularly when they are regarding useless emails, texts, and other things. However, for everyone who uses email and email clients like Yahoo, email notifications are quite important. Nowadays, the Yahoo mail app works on both iOS and non-iOS devices, but many users still encounter problems when their Yahoo notifications don't show up in their notification bars. They might start repeatedly checking their Yahoo application as a result. However, there are a few potential causes for your Yahoo Mail Notification Not Working that can also be quickly fixed. So, if you own a Yahoo mail account and use an iPhone, here's what you can do to resolve the notification issue on your smartphone.