Yahoo email freaking out

[blademan1969]

Ive read in other post about excessive email not allowing phone to operate properly but whats happing here is it continues to download emails from my Yahoo account and will not stop. It has downloaded almost 4000 emails all the way back from 2008. Ive tried deleting them and when the phone get restarted all of them come back. I cant get in to anything else except email. Can not access settings ect... Any suggestions would be greatly appreciated. Thanks

Blademan1969