Fewer phones are ringing and more computers are beeping at workplaces nationwide. That's because an increasing number of employees, especially millennials, are choosing to conduct their interactions through emails instead of phone calls.

New email message (Pavel Potapov, ThinkStock)

Sending a message through one's computer or smartphone can certainly save workers time, resulting in an increased productivity rate for the office, but experts claim that emailing is only appropriate at certain times and with certain people.

"Sometimes, you really do need to talk to people," said Barbara Pachter, author of the Essentials of Business Etiquette. "If I don't know you, and all of a sudden you're pitching me in an email, why would I want to connect with you?"

The interaction can definitely get off on the wrong foot if someone's email style isn't up to par. Pachter said many workers don't pay close attention to their grammar and spelling, which can end up being an immediate turn-off for the email recipient.

"There's lots of opportunities to make mistakes when you send email," said Pachter, based in Cherry Hill.

Once a relationship is established, email can start guiding the conversations. After time, texting can even become a viable option.