Mail in the iOS app opens the Yahoo Mail app!?

I have 2 accounts set up in iOS mail. Gamil and Yahoo. When I get an email addressed to my yahoo address, I tap it and the Yahoo Mail app opens!?



I have the Gmail account set as the default in Settings.



??????



iOS 7 - iPhone 4S

via iLounge Forums http://forums.ilounge.com/iphone/278453-mail-ios-app-opens-yahoo-mail-app.html