US employees spend, on average, about a quarter of the workweek combing through hundreds of emails.
Despite the fact that we're glued to our reply buttons, career coach Barbara Pachter says that plenty of professionals still don't know how to use email appropriately.
Because of the sheer volume of messages we're reading and writing, we may be more prone to making embarrassing errors, and those mistakes can have serious consequences.
Pachter outlines the basics of modern email etiquette in her book "The Essentials of Business Etiquette."
We spoke to her and pulled out the most essential rules you need to know.