It would not open on my Mac OS X

For some reason my Apple mail didn’t open on the Mac. It has always worked and then just stopped. It had happened on my phone and they said to just download Yahoo mail, which I couldn’t find in the App store so I found this. It shows up in my applications, but when I try to open, it won’t. Waste of time…and I still can’t get my mail without opening Yahoo Mail.

Alena123 about Varietas