If your email is from your company, you don't own it and there's no expectation of privacy as you're working as a representative of that company. It's well est

If your email is from your company, you don't own it and there's no expectation of privacy as you're working as a representative of that company. It's well established that what I do outside of work can get me fired if it's deemed inappropriately representing the company. So I don't get why there's an expectation of privacy when I'm doing something with work property, even if it's an email. I'll get fired if I'm inappropriately using the vehicle my work gives me, why wouldn't I get fired if I'm inappropriately using an email address my work gives me?