deleting mail

WIN 10 build 10162. How do I delete all mail at once? Mail I do not want to read, junk mail etc. How do I empty the junk folder?

You can't if using the mail app.

It is necessary to delete files one at a time moving the mouse to the trash can.
Who knows where the email goes?

The mail app is apparently WinRT only.

If you want, like I do, to use mail in a NORMAL way,
You will have to install Windows Live Mail or something else.

Then you can handle email files normally,
like changing views or multi select deleting, emptying the junk / or deleted,
or opening and / or saving or saving as.