How do I permanently delete emails from my inbox?

[Wendy]

I would like to delete the spam I keep getting by holding
down a button and hitting delete. I thought there was a
way to do this but I don't know what that button is.
Right now it is going into my delete folder and I have to
delete it from there. I would like to be able to
permanently delete it right from the inbox. Any ideas?

Thanks!