So for awhile now my mail app has been acting up, both the inbox and sent. Sometimes it will look like it is refreshing but instead will refresh with mail from 2009. Same thing goes for when I look at the sent folder, it wont show any recent email that I have sent...

Is there something I should do like uninstall and reinstall? Or could it be a possible virus? I haven't had any issues at all with my surface other then this and I have had it for 2 years now.