e - mail abuse
When your boss uses your work email against you like it's a weapon. Usually happens when they want you gone, or someone else gets promoted over you, or they don't want to pay people who get fired.
My boss sent me an email saying I was 'unreliable' even though I was the one who fixed the server crash.
They used my email to blame me for the coffee machine breaking. I didn't even touch the coffee machine.
I got an email saying I was 'disrespectful' after I told my boss he looked like a drowned rat.