Clear communication is critical for the success of a business, and email is one of the most important tools for this. Many of us exchange emails every day with supervisors, colleagues, business partners, clients, and more. Not surprisingly, a Radicati study cited by AIIM International reports that 3.9 billion people worldwide actively sent and received emails in 2019¹. While you may think of email as one-on-one business or personal communication, that is not always the case. You can easily send messages to hundreds or thousands of recipients simultaneously. However, you may not want your whole mailing list to see every single address².