Some workplaces feature — and even encourage — a casual vibe.
That being said, it's best to err on the side of formality in your emails, especially if you're new to the organization or speaking with clients outside of your institution.
"Signing off with phrases like 'later dude' is totally cool when you're firing off a note to a friend or your son, but signing off a work email with something this casual can make you sound unprofessional, too cutesy, or overly familiar," Kerr said.