Email sign-offs are a part of every day life. Chances are you've ended a message with "best" or "sincerely." Nothing wrong with that, right? It's polite, safe, but is it even necessary? A recent Bloomberg Business article made the argument we should stop using it altogether.

But not everyone agrees. Like Barbara Pachter. She teaches business writing and is author of 'The Essentials of Business Etiquette: How to Greet, Eat, and Tweet Your Way to Success,' and she joned the show for more.