Originally Posted by Cat Herder:
Etiquette is dead. 
"Unless you are covered by an employment contract or state law that stipulates how you can be terminated, there are no restrictions on how an employer can fire you. Employers can fire employees over the phone, by paper letter or email, in person - or even by sending a text message." - https://www.thebalancecareers.com/wh...-email-4030579
Sadly, but true! On the other side, the employee doesn't feel any more obligated to give "notice" when they quit, they just stop showing up for work....so by the same token, the employer fires someone the same way.